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[Maria-discuss] New Question: Get the error log of Mariadb
by AskMonty KB 09 Feb '15

09 Feb '15

Hello, A new question has been asked in "MariaDB Community" by nunocarapito. Please answer it at http://mariadb.com/kb/en/get-the-error-log-of-mariadb/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hi there. First of all sorry if I shouldn't be asking this. I have a big database with MariaDB running on CentOS 7, and recently it has been crashing about a time a day. I'm affraid to try anything and crush all database, making it offline for some time. I can't see what is the problem of it, because I cant find the error log of it. How can I enable it or start it? Thanks -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/get-the-error-log-of-mariadb/

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[Maria-discuss] doubt... show table status
by Roberto Spadim 07 Feb '15

07 Feb '15

guys, i'm creating a table with: CREATE TABLE xxx SELECT * FROM yyyy this one take a long time (more than 1 hour) to end... my problem is... i'm using HeidiSQL sometimes to check tables and etc... when i open database it execute a SHOW TABLE STATUS FROM `database` but is blocked while create table don't end, could we implement a non block show table? or a timeout? -- Roberto Spadim SPAEmpresarial Eng. Automação e Controle

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[Maria-discuss] Restated: JSON cannot represent binary data
by Tom Worster 06 Feb '15

06 Feb '15

I think we're getting lost in the detail. Beyond dispute are two facts: 1. BINARY is a valid datatype in dynamic columns. 2. JSON cannot represent binary data. It follows that: COLUMN_JSON() cannot (correctly) represent all dynamic column values. So I ask the question is: What *should* COLUMN_JSON() do when a dynamic column contains BINARY values? When I file a bug report, I like to give an expected result. I don't know what it is in this case. Every other decent JSON encoder errors on such input. Is that what Maria should do?

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[Maria-discuss] direct send data to app client
by Roberto Spadim 04 Feb '15

04 Feb '15

... i was thinking about big table results, internall network use, and optimization ... should be interesting, if we have a database-side way to export data directly to app-client i'm thinking about a configuration like... client app ----(conect)---> app server, app mysql client ----(connect)---> mysql server client app send a post/get/or any other rpc/ipc method app server, execute some functions ask to mysql database and return data sometimes data is too big, and we transfer data from mysql to app, and from app to client, my idea is transfer mysql to client app this idea have some security problems, but let's think about the solution... at app server we send queries to server and report to server save it, server send a ticket, with a ttl or something like it, app them send this ticket to app client app client connect to mysql/mariadb server with a daemon plugin and 'download' this data i didn't google about this yet, but, should this be possible? in this case, i think the json/bson should be interesting since we need to translate the mysql rows/columns to a standard encode (probably json, bson, xml, html table, csv or something like it), i'm thinking about http/https (or any other network file system / file share protocol) protocol at mysql side or... i didn't think if that's possible without some patch... could the mysql server save the result to a file? like a mysqldump but using only SQL interface? maybe a create table with connect engine? ideas are wellcome -- Roberto Spadim

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[Maria-discuss] MariaDB 10.0.16 now available
by Daniel Bartholomew 03 Feb '15

03 Feb '15

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.0.16 This is a Stable (GA) release. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 10.0.16 - Release Notes: https://mariadb.com/kb/en/mariadb-10016-release-notes - Changelog: https://mariadb.com/kb/en/mariadb-10016-changelog - Downloads: https://downloads.mariadb.org/mariadb/10.0.16 About MariaDB 10.0: - https://mariadb.com/kb/en/what-is-mariadb-100/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/en/donate/ - http://www.cafepress.com/mariadb We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] Sudden communication failure on MariaDB Galera Cluster
by Raina Masand 03 Feb '15

03 Feb '15

Hello, Recently, we experienced a sudden failure on a 3-node MariaDB Galera cluster (version 10.0.13), and can't find any documentation or discussion of these particular logs. Prior to the crash, our cluster seemed to be experiencing connectivity issues, and this particular node was partitioned from both its peers. It was in a non-primary state when the following occurred: 150126 6:26:16 [Note] WSREP: evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, GATHER, view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,4)) suspecting node: b3156374-a4dc-11e4-90ef-7745fb12a381 150126 6:26:17 [Warning] WSREP: subsequent views have same members, prev view view(view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,4) memb { fee139da-a4dc-11e4-896b-13e5de7439e0,0 } joined { } left { } partitioned { }) current view view(view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5) memb { fee139da-a4dc-11e4-896b-13e5de7439e0,0 } joined { } left { } partitioned { }) 150126 6:26:17 [Note] WSREP: view(view_id(NON_PRIM,fee139da-a4dc-11e4-896b-13e5de7439e0,5) memb { fee139da-a4dc-11e4-896b-13e5de7439e0,0 } joined { } left { } partitioned { 7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,0 b3156374-a4dc-11e4-90ef-7745fb12a381,0 }) 150126 6:26:17 [Note] WSREP: New COMPONENT: primary = no, bootstrap = no, my_idx = 0, memb_num = 1 150126 6:26:17 [Note] WSREP: Flow-control interval: [16, 16] 150126 6:26:17 [Note] WSREP: Received NON-PRIMARY. 150126 6:26:17 [Note] WSREP: New cluster view: global state: 7ef7ed24-a4dc-11e4-be97-6ee0620c8266:43, view# -1: non-Primary, number of nodes: 1, my index: 0, protocol version 3 150126 6:26:17 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification. 150126 6:26:20 [Note] WSREP: (fee139da-a4dc-11e4-896b-13e5de7439e0, 'tcp:// 0.0.0.0:4567') reconnecting to 7ef72f2a-a4dc-11e4-8f5b-bb400fba8578 (tcp:// 10.85.49.128:4567), attempt 0 150126 6:26:28 [Note] WSREP: (fee139da-a4dc-11e4-896b-13e5de7439e0, 'tcp:// 0.0.0.0:4567') address 'tcp://10.85.49.130:4567' pointing to uuid fee139da-a4dc-11e4-896b-13e5de7439e0 is blacklisted, skipping 150126 6:26:28 [Note] WSREP: (fee139da-a4dc-11e4-896b-13e5de7439e0, 'tcp:// 0.0.0.0:4567') address 'tcp://10.85.49.130:4567' pointing to uuid fee139da-a4dc-11e4-896b-13e5de7439e0 is blacklisted, skipping 150126 6:26:28 [Note] WSREP: (fee139da-a4dc-11e4-896b-13e5de7439e0, 'tcp:// 0.0.0.0:4567') address 'tcp://10.85.49.130:4567' pointing to uuid fee139da-a4dc-11e4-896b-13e5de7439e0 is blacklisted, skipping 150126 6:26:28 [Note] WSREP: (fee139da-a4dc-11e4-896b-13e5de7439e0, 'tcp:// 0.0.0.0:4567') address 'tcp://10.85.49.130:4567' pointing to uuid fee139da-a4dc-11e4-896b-13e5de7439e0 is blacklisted, skipping 150126 6:26:28 [Note] WSREP: (fee139da-a4dc-11e4-896b-13e5de7439e0, 'tcp:// 0.0.0.0:4567') turning message relay requesting off 150126 6:26:28 [Warning] WSREP: evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, INSTALL, view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5)) dropping foreign message from b3156374-a4dc-11e4-90ef-7745fb12a381 in install state 150126 6:26:28 [Warning] WSREP: evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, INSTALL, view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5)) dropping foreign message from b3156374-a4dc-11e4-90ef-7745fb12a381 in install state 150126 6:26:28 [Warning] WSREP: evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, INSTALL, view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5)) dropping foreign message from b3156374-a4dc-11e4-90ef-7745fb12a381 in install state 150126 6:26:28 [Warning] WSREP: evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, INSTALL, view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5)) dropping foreign message from b3156374-a4dc-11e4-90ef-7745fb12a381 in install state 150126 6:26:28 [Warning] WSREP: evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, INSTALL, view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5)) dropping foreign message from b3156374-a4dc-11e4-90ef-7745fb12a381 in install state 150126 6:26:28 [Warning] WSREP: evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, INSTALL, view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5)) dropping foreign message from b3156374-a4dc-11e4-90ef-7745fb12a381 in install state 150126 6:26:28 [ERROR] WSREP: exception caused by message: evs::msg{version=0,type=3,user_type=255,order=1,seq=-1,seq_range=-1,aru_seq=-1,flags=4,source=7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,source_view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,6),range_uuid=00000000-0000-0000-0000-000000000000,range=[-1,-1],fifo_seq=176868,node_list=() } state after handling message: evs::proto(evs::proto(fee139da-a4dc-11e4-896b-13e5de7439e0, INSTALL, view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,6)), INSTALL) { current_view=view(view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,6) memb { 7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,0 } joined { } left { } partitioned { }), input_map=evs::input_map: {aru_seq=-1,safe_seq=-1,node_index=}, fifo_seq=176418, last_sent=11, known={ 7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,evs::node{operational=1,suspected=0,installed=1,fifo_seq=176868,join_message= evs::msg{version=0,type=4,user_type=255,order=1,seq=4,seq_range=-1,aru_seq=4,flags=4,source=7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,source_view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,5),range_uuid=00000000-0000-0000-0000-000000000000,range=[-1,-1],fifo_seq=176864,node_list=( 7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,node: {operational=1,suspected=0,leave_seq=-1,view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,5),safe_seq=4,im_range=[10,9],} b3156374-a4dc-11e4-90ef-7745fb12a381,node: {operational=0,suspected=1,leave_seq=-1,view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,5),safe_seq=4,im_range=[5,4],} fee139da-a4dc-11e4-896b-13e5de7439e0,node: {operational=1,suspected=0,leave_seq=-1,view_id=view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,4),safe_seq=0,im_range=[1,0],} ) }, } fee139da-a4dc-11e4-896b-13e5de7439e0,evs::node{operational=1,suspected=0,installed=1,fifo_seq=-1,join_message= evs::msg{version=0,type=4,user_type=255,order=1,seq=11,seq_range=-1,aru_seq=11,flags=0,source=fee139da-a4dc-11e4-896b-13e5de7439e0,source_view_id=view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5),range_uuid=00000000-0000-0000-0000-000000000000,range=[-1,-1],fifo_seq=176416,node_list=( 7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,node: {operational=1,suspected=0,leave_seq=-1,view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,5),safe_seq=4,im_range=[10,9],} fee139da-a4dc-11e4-896b-13e5de7439e0,node: {operational=1,suspected=0,leave_seq=-1,view_id=view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5),safe_seq=11,im_range=[12,11],} ) }, } } install msg=evs::msg{version=0,type=5,user_type=255,order=1,seq=4,seq_range=-1,aru_seq=4,flags=4,source=7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,source_view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,5),range_uuid=00000000-0000-0000-0000-000000000000,range=[-1,-1],fifo_seq=176866,node_list=( 7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,node: {operational=1,suspected=0,leave_seq=-1,view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,5),safe_seq=4,im_range=[10,9],} b3156374-a4dc-11e4-90ef-7745fb12a381,node: {operational=0,suspected=1,leave_seq=-1,view_id=view_id(REG,7ef72f2a-a4dc-11e4-8f5b-bb400fba8578,5),safe_seq=4,im_range=[5,4],} fee139da-a4dc-11e4-896b-13e5de7439e0,node: {operational=1,suspected=0,leave_seq=-1,view_id=view_id(REG,fee139da-a4dc-11e4-896b-13e5de7439e0,5),safe_seq=11,im_range=[12,11],} ) } } 150126 6:26:28 [ERROR] WSREP: exception from gcomm, backend must be restarted: nmi != known_.end(): node b3156374-a4dc-11e4-90ef-7745fb12a381 not found from known map (FATAL) at gcomm/src/evs_proto.cpp:shift_to():2363 150126 6:26:28 [Note] WSREP: Received self-leave message. 150126 6:26:28 [Note] WSREP: Flow-control interval: [0, 0] 150126 6:26:28 [Note] WSREP: Received SELF-LEAVE. Closing connection. 150126 6:26:28 [Note] WSREP: Shifting OPEN -> CLOSED (TO: 43) 150126 6:26:28 [Note] WSREP: RECV thread exiting 0: Success 150126 6:28:16 [Note] WSREP: New cluster view: global state: 7ef7ed24-a4dc-11e4-be97-6ee0620c8266:43, view# -1: non-Primary, number of nodes: 0, my index: -1, protocol version 3 150126 6:28:16 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification. 150126 6:28:16 [Note] WSREP: applier thread exiting (code:0) At this point, the mysqld process was still running but no further logging occurred. We know that we can repair this cluster by bootstrapping a single node, but would like to understand what may have happened to cause this crash. We've highlighted some specific log messages that seemed more significant. The logs of the node in question, b3156374-a4dc-11e4-90ef-7745fb12a381, show that the node continued to function (attempting to find cluster members) for quite some time after this crash. It was unable to connect to fee139da-a4dc-11e4-896b-13e5de7439e0and is still running, still trying to connect at the moment. Any insight into what's going on here, or has anyone seen similar behavior? Looking to see whether this is an effect of the connectivity issues we've seen, or something else entirely. We've also cross-posted this on the Galera/Codership forums. Thanks, Raina and Lyle Cloud Foundry Services Team

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[Maria-discuss] New Question: install_spider.sql: no xa?
by AskMonty KB 02 Feb '15

02 Feb '15

Hello, A new question has been asked in "Spider" by michaeldec. Please answer it at http://mariadb.com/kb/en/install_spidersql-no-xa/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- I've a fresh server with MariaDB on it. After running install_spider.sql into it, the result of "SELECT engine, xa FROM information_schema.engines;" is: +--------------------+------+ | engine | xa | +--------------------+------+ | SPIDER | NO | | MRG_MyISAM | NO | | MEMORY | NO | | BLACKHOLE | NO | | MyISAM | NO | | InnoDB | YES | | ARCHIVE | NO | | FEDERATED | NO | | PERFORMANCE_SCHEMA | NO | | Aria | NO | | CSV | NO | +--------------------+------+ According to KB, this isn't meant to look like this and instead I'm meant to have xa set to YES on SPIDER. I'm running MariaDB 10.0.16 and here's my install_spider.sql: http://pastebin.com/RzrWTpaQ So the question is, why isn't xa being enabled on SPIDER? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/install_spidersql-no-xa/

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[Maria-discuss] The future of Dynamic Columns
by Tom Worster 01 Feb '15

01 Feb '15

I've been excited about the potential uses of Maria's Dynamic Columns (MDC) since I first read about the them. Now I am starting a new application development and want to use MDC. It's a server-side PHP webapp using the Yii 2.0 MVC framework. These days, for typical webapp pages, I seldom write SQL and use the ORM instead. So I started writing an extension to the Yii 2.0 Active Record ORM to provide an abstract interface to read and write structured dynamic attributes as well as use them in queries. I'm trying to do it so that I can make the same API work using PostgreSQL jsonb and perhaps other things. While this is very interesting work, I have developed a vague uncomfortable feeling about MDC. I have the sense that this wicked powerful feature is suffering from atrophy and possibly apathy. Contributing to this sense: 1. I haven't been able to discuss MDC with anyone who uses it. (If you do, contacts below). 2. In at least two places (one was here <https://mariadb.com/kb/en/mariadb/indexoptimizations-in-dynamic-columns/>) I've read text with the implied meaning, "we may improve such-and-such about MDC if and when people start actually using it." 3. The MDC syntax is so clunky I worry that people who might find it useful are turned away. 4. Did the 5.3 version with numbers for column names turn people off MDC for good? 5. The requirement to specify datatype when querying a dynamic column is agonizing. The manual says it is a limitation of SQL itself (presumably immutable) but PostgreSQL manages to avoid it when querying jsonb doc properties. 6. The lack of indexing of dynamic columns is a severe limitation but PostgreSQL manages to index jsonb document properties. And then... 7. I head a rumor that some kind of JSON features are coming to Maria. So, do Maria's Dynamic Columns have a future? Are my fears that MDC will be neglected as some better solution to the same problem receives all the attention? Basically, I'm trying to gauge the risk vs. return in my investment in developing the ORM extension I mentioned at the top. Tom fsb(a)thefsb.org tom[] on Freenode

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Re: [Maria-discuss] JSON and binary strings
by Tom Worster 31 Jan '15

31 Jan '15

I could have been more direct. What should be the expected behavior in the following? SELECT COLUMN_JSON(COLUMN_CREATE('name', UNHEX('C1C2C3C4C5C6'))); From: Tom Worster <fsb(a)thefsb.org> Date: Friday, January 30, 2015 at 9:05 PM To: maria-discuss email list <maria-discuss(a)lists.launchpad.net> Subject: [Maria-discuss] JSON and binary strings BINARY is one of the datatypes you can use with dynamic columns. If you try saving binary string and then retrieve it with COLUMN_JSON() then you get an invalid JSON document back. All the JSON decoders I tested reject such documents. It doesn't make sense to me that COLUMN_JSON() would return a document that's invalid according to the JSON spec and can't be decoded. But I don't know what it should do. It seems that BINARY in dynamic columns means that COLUMN_JSON() is in an impossible position. [On a related note, if you save a valid utf8 string that includes control characters (e.g. "I went down to the river,\nI set down on the bank.") then COLUMN_JSON() fails to escape them. While similar, this I think is a bug.] Tom _______________________________________________ Mailing list: https://launchpad.net/~maria-discuss Post to : maria-discuss(a)lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-discuss More help : https://help.launchpad.net/ListHelp

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[Maria-discuss] JSON and binary strings
by Tom Worster 31 Jan '15

31 Jan '15

BINARY is one of the datatypes you can use with dynamic columns. If you try saving binary string and then retrieve it with COLUMN_JSON() then you get an invalid JSON document back. All the JSON decoders I tested reject such documents. It doesn't make sense to me that COLUMN_JSON() would return a document that's invalid according to the JSON spec and can't be decoded. But I don't know what it should do. It seems that BINARY in dynamic columns means that COLUMN_JSON() is in an impossible position. [On a related note, if you save a valid utf8 string that includes control characters (e.g. "I went down to the river,\nI set down on the bank.") then COLUMN_JSON() fails to escape them. While similar, this I think is a bug.] Tom

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[Maria-discuss] New Question: Why are almost all ROWS_EXAMINED values 0 in events_statements_* tables (performance_schema) !?
by AskMonty KB 30 Jan '15

30 Jan '15

Hello, A new question has been asked in "MariaDB Community" by fabian-atrada. Please answer it at http://mariadb.com/kb/en/why-are-almost-all-rows_examined-values-0-in-event… as the person asking the question may not be subscribed to the mailing list. -------------------------------- In the last days I started to explore the new possibilities of the perofmance_schema in 10.0.x. In this process I discovered the valuable event_statemens_* tables, which I could imagine using for some new monitoring approaches. While studying the content of the event_statemens_* on our production DB server, I have noticed, that almost all ROWS_EXAMINED values were always equal 0! Only on one server, in the events_statements_summary_by_digest table could I find a few entries with ROWS_EXAMINED > 0 (but in those cases, both DIGEST and DIGEST_TEXT were NULL ???) .... which is a real pity, because this value seems to be the best one to be used as some kind of "load" indicator (and it can show very quickly, if a query needs an unreasonable amount of rows to be examined ... etc. ..). Now the questions is, why is this happening? As far as I could see, all other values in the event_statemens_* tables seemed to have reasonable values. Only ROWS_EXAMINED was missing notoriously. Is there special reason for this? Is there some instrumentation setting needed to make this work? Is there some server variable which influences this? or is there some very special technical reason - from the servers logic - which prohibits to gather this value most of the time? By the way, I have also observed - and this might coincide with this issue - that neither do I ever see EXAMINED_ROWS > 0 in `information_schema`.`PROCESSLIST`! Even if I fire a lung running query, which uses a table scan. By the way, the only place where I always - and reliably - see ROWS_EXAMINED is in the slow_query_log! I am really curious about the background (and possible reasons) for this - seemingly - strange behavior. Thank you very much! -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/why-are-almost-all-rows_examined-values-0-in-event…

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[Maria-discuss] New Question: What's the chance of a true Boolean data type in MariaDB?
by AskMonty KB 30 Jan '15

30 Jan '15

Hello, A new question has been asked in "MariaDB Community" by RobLewis. Please answer it at http://mariadb.com/kb/en/whats-the-chance-of-a-true-boolean-data-type-in-ma… as the person asking the question may not be subscribed to the mailing list. -------------------------------- As a MySQL user, I've often been bothered by the lack of a true Boolean data type in MySQL. Is there any chance this omission will be filled in MariaDB? And yes, I know there are workarounds. -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/whats-the-chance-of-a-true-boolean-data-type-in-ma…

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[Maria-discuss] MariaDB Galera Cluster 10.0.16 now available
by Daniel Bartholomew 29 Jan '15

29 Jan '15

The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 10.0.16 This is a Stable (GA) release. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB Galera Cluster 10.0.16 - Release Notes: https://mariadb.com/kb/en/mariadb-galera-cluster-10016-release-notes - Changelog: https://mariadb.com/kb/en/mariadb-galera-cluster-10016-changelog - Downloads: https://downloads.mariadb.org/mariadb-galera/10.0.16 About MariaDB Galera Cluster: - https://mariadb.com/kb/en/what-is-mariadb-galera-cluster/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to MariaDB, please see the "contributing" page in the Knowledge Base. - https://mariadb.com/kb/en/contributing We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] Fwd: Re: The future of Dynamic Columns
by Oleksandr Byelkin 28 Jan '15

28 Jan '15

Hi! Sorry I forgot to put in in the list. -------- Forwarded Message -------- Тема: Re: [Maria-discuss] The future of Dynamic Columns Дата: Wed, 28 Jan 2015 23:44:39 +0100 Від: Oleksandr Byelkin <sanja(a)montyprogram.com> Кому: Roberto Spadim <roberto(a)spadim.com.br> Hi, Roberto! On 28.01.15 23:13, Roberto Spadim wrote: > Hi Peter :) i will talk about what i used and what i consider > interesting to have, > > > 2015-01-28 19:25 GMT-02:00 Peter Laursen <peter_laursen(a)webyog.com > <mailto:peter_laursen@webyog.com>>: > > @Roberto. A comment to "i think it's a nice human readable format > for arrays/objects, nothing less nothing more". > > But why will you then need to **store** as JSON? > > about "store": > 1) it's nice to read data without any tool (function), it's easy to > read a object or a array, maybe could use YAML or any other format (i > don't like XML cause it consume too many space) > 2) saving json could optimize cpu use at php/application server > without decode data every read (if you use json a lot, not my case) > 3) could be nice to export/import data? i don't know, today i use > table dump when i need, or a small script or pre defined data format > > about "json internally implemented at database / store": > 1)seach with index, jpath/xpath or others functions, consume less > space when possible json/xml specific field type > 2)today when i use json i save using a blob column and execute a > compress() function when possible, sometimes i don't care about > datasize, and only save at blob columns (or maybe varchar when data is > small) Actually saving JSON as is looks so inefficient that even MongoDB store BSON AFAIK. [skip]

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Re: [Maria-discuss] Unable to DROP table, Data Dict problem
by Martin Langhoff 28 Jan '15

28 Jan '15

Hi Jan, the root cause for the corruption, we know: NFSv4 bugs. The "dump/restore-to-new-db" path we know as well. My question here is: is there a way to get rid of this table _without restoring to a new DB_. thanks, martin On Wed, Jan 28, 2015 at 2:05 AM, Jan Lindström <jan.lindstrom(a)mariadb.com> wrote: > Hi, > > Yes I see the assertion, it is a consistency check. Inside a tablespace > (table in this case) every page has space_id stored. This assertion tells us > that one page has different space_id than on tablespace header i.e. there is > one page that based on metadata does not belong to this table. Furthermore, > that means that tablespace could be corrupted. If the instructions on that > web page do not help, you need to export all tables, delete everything, > import tables to new database. Can you send me full, unedited error log, I > will try to see if there is something that could help to identify the real > problem. Also if you could send me dmesg output. > > R: Jan > > On Tue, Jan 27, 2015 at 4:19 PM, Martin Langhoff <martin.langhoff(a)gmail.com> > wrote: >> >> Hi Jan, >> >> thanks for your notes. I have gone through the instructions in that >> doc link, but they do not help. In the prior emails I have included >> stack dumps and straces of what happens when I follow those >> instructions. >> >> There is something else going on, or perhaps a regression that >> prevents the procedure you mention from working right. >> >> We are definitely NOT hitting ENOSPC, nor any FS or storage side >> issue. I have double checked on that. >> >> cheers, >> >> >> m >> >> On Tue, Jan 27, 2015 at 12:37 AM, Jan Lindström >> <jan.lindstrom(a)mariadb.com> wrote: >> > Hi, >> > >> > Failure you see on >> > >> > InnoDB: Error: tablespace id is 47073 in the data dictionary InnoDB: but >> > in >> > file ./moodle_sand/mdl_tag_correlation.ibd it is 48463! >> > 150119 17:14:45 InnoDB: Assertion failure in thread 140045886629632 in >> > file >> > fil0fil.c line 778 >> > >> > indicates database corruption that is caused most likely disk failure or >> > a >> > bug on a software. With this information not easy to say which one. If >> > drop >> > table crashes while the operation is done, deleting .ibd file is not >> > enough >> > to re-create the table because table definition is on innodb data >> > dictionary >> > while it is not on MySQL/MariaDB data dictionary. Please refer to >> > >> > http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting-datadict.html >> > how to resolve the issue. >> > >> > R: Jan >> > >> > On Tue, Jan 20, 2015 at 5:00 PM, Martin Langhoff >> > <martin.langhoff(a)gmail.com> >> > wrote: >> >> >> >> Hi Folks, >> >> >> >> We run a very large infra on MariaDB/RHEL6.x/RHEV/NetApp; thousands of >> >> VMs, each running MariaDB and very busy. MariaDB is 5.5.32. >> >> >> >> We recently had some NFS problems which led to minor DB corruption. >> >> Luckily, the corruption was isolated to a table holding cache data, >> >> and in fact one that is empty in most of our instances. That's the >> >> good news. >> >> >> >> The bad news is that the data dict is really unhappy about that table. >> >> >> >> - Cannot drop it, we get a nasty stack trace at [1] >> >> >> >> - Stopping MariaDB, removing the table by hand, restarting MariaDB, >> >> attempting to re-create the table hits a data dict error [2]. On disk >> >> I can see it created an ibd file, but no frm file. Following the >> >> instructions at >> >> >> >> >> >> http://dev.mysql.com/doc/refman/5.0/en/innodb-troubleshooting-datadict.html >> >> does not help. >> >> >> >> I have straced the process, and it does not seem to even try to create >> >> the frm file, so it really looks like it's internal state (data dict), >> >> not errors from further down the stack. OS / kernel logs are clean. >> >> >> >> Is there any reasonable method to cure this "in place" with minimal >> >> disruption? (These are large DBs, dump restore is more than awkward.) >> >> >> >> Oh and careful with NFSv4 :-/ >> >> >> >> thank you! >> >> >> >> >> >> martin >> >> >> >> 1 - Stack trace when trying to drop table >> >> >> >> Version: '5.5.32-MariaDB-log' socket: '/var/lib/mysql/mysql.sock' >> >> port: 3306 MariaDB Server >> >> InnoDB: Error: tablespace id is 47073 in the data dictionary >> >> InnoDB: but in file ./moodle_sand/mdl_tag_correlation.ibd it is 48463! >> >> 150119 17:14:45 InnoDB: Assertion failure in thread 140045886629632 >> >> in file fil0fil.c line 778 >> >> InnoDB: We intentionally generate a memory trap. >> >> InnoDB: Submit a detailed bug report to http://bugs.mysql.com. >> >> InnoDB: If you get repeated assertion failures or crashes, even >> >> InnoDB: immediately after the mysqld startup, there may be >> >> InnoDB: corruption in the InnoDB tablespace. Please refer to >> >> InnoDB: >> >> http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html >> >> InnoDB: about forcing recovery. >> >> 150119 17:14:45 [ERROR] mysqld got signal 6 ; >> >> This could be because you hit a bug. It is also possible that this >> >> binary >> >> or one of the libraries it was linked against is corrupt, improperly >> >> built, >> >> or misconfigured. This error can also be caused by malfunctioning >> >> hardware. >> >> >> >> To report this bug, see http://kb.askmonty.org/en/reporting-bugs >> >> >> >> We will try our best to scrape up some info that will hopefully help >> >> diagnose the problem, but since we have already crashed, >> >> something is definitely wrong and this may fail. >> >> >> >> Server version: 5.5.32-MariaDB-log >> >> key_buffer_size=134217728 >> >> read_buffer_size=131072 >> >> max_used_connections=1 >> >> max_threads=187 >> >> thread_count=1 >> >> It is possible that mysqld could use up to >> >> key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = >> >> 182265 K bytes of memory >> >> Hope that's ok; if not, decrease some variables in the equation. >> >> >> >> Thread pointer: 0x0xa92ee60 >> >> Attempting backtrace. You can use the following information to find out >> >> where mysqld died. If you see no messages after this, something went >> >> terribly wrong... >> >> stack_bottom = 0x7f5ef9531d78 thread_stack 0x48000 >> >> ??:0(my_print_stacktrace)[0xa8631e] >> >> ??:0(handle_fatal_signal)[0x6cdd0b] >> >> ??:0(??)[0x30a7c0f500] >> >> ??:0(??)[0x30a78328a5] >> >> ??:0(??)[0x30a7834085] >> >> ??:0(fil_node_open_file)[0x8f3add] >> >> ??:0(fil_node_prepare_for_io)[0x8f3be5] >> >> ??:0(fil_space_get_flags)[0x8f7420] >> >> ??:0(fil_space_get_zip_size)[0x8f7529] >> >> ??:0(dict_drop_index_tree)[0x8d64e6] >> >> ??:0(row_upd_clust_step)[0x86d84d] >> >> ??:0(row_upd_step)[0x86e22e] >> >> ??:0(que_run_threads)[0x9577a8] >> >> ??:0(que_eval_sql)[0x957ea6] >> >> ??:0(row_drop_table_for_mysql)[0x85ae6a] >> >> ??:0(ha_innobase::delete_table(char const*))[0x8424e3] >> >> ??:0(ha_delete_table(THD*, handlerton*, char const*, char const*, char >> >> const*, bool))[0x6d5233] >> >> ??:0(mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, >> >> bool))[0x5ff928] >> >> ??:0(mysql_rm_table(THD*, TABLE_LIST*, char, char))[0x60001d] >> >> ??:0(mysql_execute_command(THD*))[0x58ad90] >> >> ??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x58e369] >> >> ??:0(dispatch_command(enum_server_command, THD*, char*, unsigned >> >> int))[0x58f790] >> >> ??:0(do_handle_one_connection(THD*))[0x647cdf] >> >> ??:0(handle_one_connection)[0x647d7c] >> >> ??:0(??)[0x30a7c07851] >> >> ??:0(??)[0x30a78e811d] >> >> >> >> Trying to get some variables. >> >> Some pointers may be invalid and cause the dump to abort. >> >> Query (0x7f5db800afa8): is an invalid pointer >> >> Connection ID (thread ID): 2 >> >> Status: NOT_KILLED >> >> >> >> Optimizer switch: >> >> >> >> >> >> index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off >> >> >> >> >> >> >> >> 2 - Error when attempting to recreate table >> >> 150119 17:15:22 InnoDB: Operating system error number 2 in a file >> >> operation. >> >> InnoDB: The error means the system cannot find the path specified. >> >> InnoDB: If you are installing InnoDB, remember that you must create >> >> InnoDB: directories yourself, InnoDB does not create them. >> >> 150119 17:15:22 InnoDB: Error: trying to open a table, but could not >> >> InnoDB: open the tablespace file >> >> './moodle_sand/mdl_tag_correlation.ibd'! >> >> InnoDB: Have you moved InnoDB .ibd files around without using the >> >> InnoDB: commands DISCARD TABLESPACE and IMPORT TABLESPACE? >> >> InnoDB: It is also possible that this is a temporary table #sql..., >> >> InnoDB: and MySQL removed the .ibd file for this. >> >> InnoDB: Please refer to >> >> InnoDB: >> >> >> >> http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting-datadict.html >> >> InnoDB: for how to resolve the issue. >> >> >> >> >> >> -- >> >> martin.langhoff(a)gmail.com >> >> - ask interesting questions >> >> - don't get distracted with shiny stuff - working code first >> >> ~ http://docs.moodle.org/en/User:Martin_Langhoff >> >> >> >> _______________________________________________ >> >> Mailing list: https://launchpad.net/~maria-discuss >> >> Post to : maria-discuss(a)lists.launchpad.net >> >> Unsubscribe : https://launchpad.net/~maria-discuss >> >> More help : https://help.launchpad.net/ListHelp >> > >> > >> >> >> >> -- >> martin.langhoff(a)gmail.com >> - ask interesting questions >> - don't get distracted with shiny stuff - working code first >> ~ http://docs.moodle.org/en/User:Martin_Langhoff > > -- martin.langhoff(a)gmail.com - ask interesting questions - don't get distracted with shiny stuff - working code first ~ http://docs.moodle.org/en/User:Martin_Langhoff

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[Maria-discuss] Can't create account on MariaDB bugtracker
by Brian Sammon 28 Jan '15

28 Jan '15

I'm having trouble creating an account on the bugtracker. I can get it to send me the email-address-verification email, but when I use the link from the email to create my account I get a "unexpected error has occurred" message. P.S. I use atlassian-contact@ as my email address for the bugtracker.

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[Maria-discuss] Presentations, interviews, news articles etc. needed
by Ian Gilfillan 27 Jan '15

27 Jan '15

I am dusting some of the neglected corners of the Knowledge Base, and there are some areas that haven't been updated in a while and that are in need of some love. If anyone has presentations, videos, news articles, interviews, suggestions for interesting mailing list threads etc that could be added to these pages, feel free to either add them to the page yourself, or send them to me to add. These are some of the pages I'm looking at: https://mariadb.com/kb/en/mariadb/presentations/ https://mariadb.com/kb/en/mariadb/videos-related-to-mariadb/ https://mariadb.com/kb/en/mariadb/news-reports-related-to-mariadb/ https://mariadb.com/kb/en/mariadb/interviews-related-to-mariadb/ https://mariadb.com/kb/en/mariadb/blog-posts-relevant-to-mariadb/ https://mariadb.com/kb/en/mariadb/interesting-mailing-list-threads/ https://mariadb.com/kb/en/mariadb/articles-related-to-mariadb/ I will probably merge some of these pages as, for example, "Articles Related to MariaDB" overlaps with some of the other pages, but in the meantime any newer content would be great. thanks, ian

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Re: [Maria-discuss] Unable to DROP table, Data Dict problem
by Martin Langhoff 27 Jan '15

27 Jan '15

Hi Jan, thanks for your notes. I have gone through the instructions in that doc link, but they do not help. In the prior emails I have included stack dumps and straces of what happens when I follow those instructions. There is something else going on, or perhaps a regression that prevents the procedure you mention from working right. We are definitely NOT hitting ENOSPC, nor any FS or storage side issue. I have double checked on that. cheers, m On Tue, Jan 27, 2015 at 12:37 AM, Jan Lindström <jan.lindstrom(a)mariadb.com> wrote: > Hi, > > Failure you see on > > InnoDB: Error: tablespace id is 47073 in the data dictionary InnoDB: but in > file ./moodle_sand/mdl_tag_correlation.ibd it is 48463! > 150119 17:14:45 InnoDB: Assertion failure in thread 140045886629632 in file > fil0fil.c line 778 > > indicates database corruption that is caused most likely disk failure or a > bug on a software. With this information not easy to say which one. If drop > table crashes while the operation is done, deleting .ibd file is not enough > to re-create the table because table definition is on innodb data dictionary > while it is not on MySQL/MariaDB data dictionary. Please refer to > http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting-datadict.html > how to resolve the issue. > > R: Jan > > On Tue, Jan 20, 2015 at 5:00 PM, Martin Langhoff <martin.langhoff(a)gmail.com> > wrote: >> >> Hi Folks, >> >> We run a very large infra on MariaDB/RHEL6.x/RHEV/NetApp; thousands of >> VMs, each running MariaDB and very busy. MariaDB is 5.5.32. >> >> We recently had some NFS problems which led to minor DB corruption. >> Luckily, the corruption was isolated to a table holding cache data, >> and in fact one that is empty in most of our instances. That's the >> good news. >> >> The bad news is that the data dict is really unhappy about that table. >> >> - Cannot drop it, we get a nasty stack trace at [1] >> >> - Stopping MariaDB, removing the table by hand, restarting MariaDB, >> attempting to re-create the table hits a data dict error [2]. On disk >> I can see it created an ibd file, but no frm file. Following the >> instructions at >> >> http://dev.mysql.com/doc/refman/5.0/en/innodb-troubleshooting-datadict.html >> does not help. >> >> I have straced the process, and it does not seem to even try to create >> the frm file, so it really looks like it's internal state (data dict), >> not errors from further down the stack. OS / kernel logs are clean. >> >> Is there any reasonable method to cure this "in place" with minimal >> disruption? (These are large DBs, dump restore is more than awkward.) >> >> Oh and careful with NFSv4 :-/ >> >> thank you! >> >> >> martin >> >> 1 - Stack trace when trying to drop table >> >> Version: '5.5.32-MariaDB-log' socket: '/var/lib/mysql/mysql.sock' >> port: 3306 MariaDB Server >> InnoDB: Error: tablespace id is 47073 in the data dictionary >> InnoDB: but in file ./moodle_sand/mdl_tag_correlation.ibd it is 48463! >> 150119 17:14:45 InnoDB: Assertion failure in thread 140045886629632 >> in file fil0fil.c line 778 >> InnoDB: We intentionally generate a memory trap. >> InnoDB: Submit a detailed bug report to http://bugs.mysql.com. >> InnoDB: If you get repeated assertion failures or crashes, even >> InnoDB: immediately after the mysqld startup, there may be >> InnoDB: corruption in the InnoDB tablespace. Please refer to >> InnoDB: >> http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html >> InnoDB: about forcing recovery. >> 150119 17:14:45 [ERROR] mysqld got signal 6 ; >> This could be because you hit a bug. It is also possible that this binary >> or one of the libraries it was linked against is corrupt, improperly >> built, >> or misconfigured. This error can also be caused by malfunctioning >> hardware. >> >> To report this bug, see http://kb.askmonty.org/en/reporting-bugs >> >> We will try our best to scrape up some info that will hopefully help >> diagnose the problem, but since we have already crashed, >> something is definitely wrong and this may fail. >> >> Server version: 5.5.32-MariaDB-log >> key_buffer_size=134217728 >> read_buffer_size=131072 >> max_used_connections=1 >> max_threads=187 >> thread_count=1 >> It is possible that mysqld could use up to >> key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = >> 182265 K bytes of memory >> Hope that's ok; if not, decrease some variables in the equation. >> >> Thread pointer: 0x0xa92ee60 >> Attempting backtrace. You can use the following information to find out >> where mysqld died. If you see no messages after this, something went >> terribly wrong... >> stack_bottom = 0x7f5ef9531d78 thread_stack 0x48000 >> ??:0(my_print_stacktrace)[0xa8631e] >> ??:0(handle_fatal_signal)[0x6cdd0b] >> ??:0(??)[0x30a7c0f500] >> ??:0(??)[0x30a78328a5] >> ??:0(??)[0x30a7834085] >> ??:0(fil_node_open_file)[0x8f3add] >> ??:0(fil_node_prepare_for_io)[0x8f3be5] >> ??:0(fil_space_get_flags)[0x8f7420] >> ??:0(fil_space_get_zip_size)[0x8f7529] >> ??:0(dict_drop_index_tree)[0x8d64e6] >> ??:0(row_upd_clust_step)[0x86d84d] >> ??:0(row_upd_step)[0x86e22e] >> ??:0(que_run_threads)[0x9577a8] >> ??:0(que_eval_sql)[0x957ea6] >> ??:0(row_drop_table_for_mysql)[0x85ae6a] >> ??:0(ha_innobase::delete_table(char const*))[0x8424e3] >> ??:0(ha_delete_table(THD*, handlerton*, char const*, char const*, char >> const*, bool))[0x6d5233] >> ??:0(mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, >> bool))[0x5ff928] >> ??:0(mysql_rm_table(THD*, TABLE_LIST*, char, char))[0x60001d] >> ??:0(mysql_execute_command(THD*))[0x58ad90] >> ??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x58e369] >> ??:0(dispatch_command(enum_server_command, THD*, char*, unsigned >> int))[0x58f790] >> ??:0(do_handle_one_connection(THD*))[0x647cdf] >> ??:0(handle_one_connection)[0x647d7c] >> ??:0(??)[0x30a7c07851] >> ??:0(??)[0x30a78e811d] >> >> Trying to get some variables. >> Some pointers may be invalid and cause the dump to abort. >> Query (0x7f5db800afa8): is an invalid pointer >> Connection ID (thread ID): 2 >> Status: NOT_KILLED >> >> Optimizer switch: >> >> index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off >> >> >> >> 2 - Error when attempting to recreate table >> 150119 17:15:22 InnoDB: Operating system error number 2 in a file >> operation. >> InnoDB: The error means the system cannot find the path specified. >> InnoDB: If you are installing InnoDB, remember that you must create >> InnoDB: directories yourself, InnoDB does not create them. >> 150119 17:15:22 InnoDB: Error: trying to open a table, but could not >> InnoDB: open the tablespace file './moodle_sand/mdl_tag_correlation.ibd'! >> InnoDB: Have you moved InnoDB .ibd files around without using the >> InnoDB: commands DISCARD TABLESPACE and IMPORT TABLESPACE? >> InnoDB: It is also possible that this is a temporary table #sql..., >> InnoDB: and MySQL removed the .ibd file for this. >> InnoDB: Please refer to >> InnoDB: >> http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting-datadict.html >> InnoDB: for how to resolve the issue. >> >> >> -- >> martin.langhoff(a)gmail.com >> - ask interesting questions >> - don't get distracted with shiny stuff - working code first >> ~ http://docs.moodle.org/en/User:Martin_Langhoff >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~maria-discuss >> Post to : maria-discuss(a)lists.launchpad.net >> Unsubscribe : https://launchpad.net/~maria-discuss >> More help : https://help.launchpad.net/ListHelp > > -- martin.langhoff(a)gmail.com - ask interesting questions - don't get distracted with shiny stuff - working code first ~ http://docs.moodle.org/en/User:Martin_Langhoff

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[Maria-discuss] Inclusion of Mysql security fixes in MariaDB
by Raina Masand 27 Jan '15

27 Jan '15

Hello, We recently were informed of some security fixes in Mysql 5.5.41: http://www.ubuntu.com/usn/usn-2480-1/ and are wondering whether there are plans to include these in an upcoming MariaDB release. Right now, we are running 10.0.13, so we're trying to plan the next upgrade. We see that there have been similar fixes included in MariaDB 10.0.14 and 10.0.15, so this seems likely. Based on this https://mariadb.com/kb/en/mariadb/development/security/ list of CVE's, it looks like the MariaDB 10.0.15 and MariaDB 5.5.40 include the same security fixes (presumably pulled from Mysql 5.5.40). Can we expect that the fixes from Mysql 5.5.41 will be included in an upcoming MariaDB 10.0.16 release? Would appreciate any insight into the general schedule for addressing these vulnerabilities. Thanks! Raina Masand and Lyle Franklin Cloud Foundry Core Services Team

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[Maria-discuss] New Question: Getting column names from the fields that use non-ANSI characters
by AskMonty KB 27 Jan '15

27 Jan '15

Hello, A new question has been asked in "CONNECT" by evgenyko. Please answer it at http://mariadb.com/kb/en/getting-column-names-from-the-fields-that-use-non-… as the person asking the question may not be subscribed to the mailing list. -------------------------------- I am trying to replicate example how to create pivot table like from MariaDB documentation: https://mariadb.com/kb/en/mariadb/documentation/storage-engines/connect/con… Everything works as fine as explained. However, if I replace in source table fields 'Beer' with '啤酒‘ and 'Car' with 'машина‘, I get the following CREATE TABLE statement: CREATE TABLE `pivex_cn` ( `who` varchar(135) NOT NULL, `week` int(11) NOT NULL, `å•¤é…’` decimal(6,2) NOT NULL `FLAG`=1, `Food` decimal(6,2) NOT NULL `FLAG`=1, `Ð¼Ð°ÑˆÐ¸Ð½Ð°` decimal(6,2) NOT NULL `FLAG`=1 ) ENGINE=CONNECT DEFAULT CHARSET=utf8 `TABLE_TYPE`='pivot' `TABNAME`='topivot_cn' Which then in SELECT * FROM pivex_cn; gives the following error: "Error Code: 1296. Got error 122 'Cannot find matching column' from CONNECT" All tables are using utf8 as default. I also tried uft8mb4, the same result :( -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/getting-column-names-from-the-fields-that-use-non-…

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[Maria-discuss] Row size too large
by Reindl Harald 26 Jan '15

26 Jan '15

after upgrade the first testserver to 10.0.15: InnoDB: The total blob data length (13476124) is greater than 10% of the redo log file size (5120). Please increase innodb_log_file_size. * previously no problems * stopped server * increased innodb_log_file_size to 128MB * deleted ib_logfile* * started server * the same again why - that's only a small test-vm with not much data? ____________________________________________ ERROR 1118 (42000): Row size too large. The maximum row size for the used table type, not counting BLOBs, is 8126. This includes storage overhead, check the manual. You have to change some columns to TEXT or BLOBs MariaDB [dbmail]> show create table dbmail_mimeparts; +------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Table | Create Table | +------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | dbmail_mimeparts | CREATE TABLE `dbmail_mimeparts` ( `id` bigint(20) unsigned NOT NULL AUTO_INCREMENT, `hash` char(128) NOT NULL, `data` longblob NOT NULL, `size` bigint(20) NOT NULL DEFAULT '0', PRIMARY KEY (`id`), KEY `hash` (`hash`) ) ENGINE=InnoDB AUTO_INCREMENT=43391 DEFAULT CHARSET=utf8 ROW_FORMAT=COMPRESSED | +------------------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.00 sec)

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[Maria-discuss] New Question: External (Connect) Tables read-only after MariaDB upgrade from 10.0.12.0 to 10.0.15.0
by AskMonty KB 21 Jan '15

21 Jan '15

Hello, A new question has been asked in "CONNECT" by jhtclaessen. Please answer it at http://mariadb.com/kb/en/external-connect-tables-read-only-after-mariadb-up… as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hello, I am testing MariaDB and I have ODBC connections to MSSQL server. This seemed to work pretty well in 10.0.12.0. After we installed a new 10.0.15.0 we could not get this working, all our external tables reported back as 'read-only'. (SQL Error (1036): Table '.....' is read only). We started troubleshooting but couldn't figure out why. So we upgraded the 10.0.12.0 version to 10.0.15.0 as well and now we have the same problem there. I see a lot of changes to the Connect Engine in 10.0.13.0, so that might be the problem. But I cannot downgrade anymore, hence we now have a problem, since we cannot use the functionality anymore due to the fact that we cannot update or insert records into another MSSQL database (through triggers). Does anyone have any clue what could cause this and how to solve this? Thanks in advance! -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/external-connect-tables-read-only-after-mariadb-up…

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[Maria-discuss] Unable to DROP table, Data Dict problem
by Martin Langhoff 20 Jan '15

20 Jan '15

Hi Folks, We run a very large infra on MariaDB/RHEL6.x/RHEV/NetApp; thousands of VMs, each running MariaDB and very busy. MariaDB is 5.5.32. We recently had some NFS problems which led to minor DB corruption. Luckily, the corruption was isolated to a table holding cache data, and in fact one that is empty in most of our instances. That's the good news. The bad news is that the data dict is really unhappy about that table. - Cannot drop it, we get a nasty stack trace at [1] - Stopping MariaDB, removing the table by hand, restarting MariaDB, attempting to re-create the table hits a data dict error [2]. On disk I can see it created an ibd file, but no frm file. Following the instructions at http://dev.mysql.com/doc/refman/5.0/en/innodb-troubleshooting-datadict.html does not help. I have straced the process, and it does not seem to even try to create the frm file, so it really looks like it's internal state (data dict), not errors from further down the stack. OS / kernel logs are clean. Is there any reasonable method to cure this "in place" with minimal disruption? (These are large DBs, dump restore is more than awkward.) Oh and careful with NFSv4 :-/ thank you! martin 1 - Stack trace when trying to drop table Version: '5.5.32-MariaDB-log' socket: '/var/lib/mysql/mysql.sock' port: 3306 MariaDB Server InnoDB: Error: tablespace id is 47073 in the data dictionary InnoDB: but in file ./moodle_sand/mdl_tag_correlation.ibd it is 48463! 150119 17:14:45 InnoDB: Assertion failure in thread 140045886629632 in file fil0fil.c line 778 InnoDB: We intentionally generate a memory trap. InnoDB: Submit a detailed bug report to http://bugs.mysql.com. InnoDB: If you get repeated assertion failures or crashes, even InnoDB: immediately after the mysqld startup, there may be InnoDB: corruption in the InnoDB tablespace. Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html InnoDB: about forcing recovery. 150119 17:14:45 [ERROR] mysqld got signal 6 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. To report this bug, see http://kb.askmonty.org/en/reporting-bugs We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. Server version: 5.5.32-MariaDB-log key_buffer_size=134217728 read_buffer_size=131072 max_used_connections=1 max_threads=187 thread_count=1 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 182265 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. Thread pointer: 0x0xa92ee60 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... stack_bottom = 0x7f5ef9531d78 thread_stack 0x48000 ??:0(my_print_stacktrace)[0xa8631e] ??:0(handle_fatal_signal)[0x6cdd0b] ??:0(??)[0x30a7c0f500] ??:0(??)[0x30a78328a5] ??:0(??)[0x30a7834085] ??:0(fil_node_open_file)[0x8f3add] ??:0(fil_node_prepare_for_io)[0x8f3be5] ??:0(fil_space_get_flags)[0x8f7420] ??:0(fil_space_get_zip_size)[0x8f7529] ??:0(dict_drop_index_tree)[0x8d64e6] ??:0(row_upd_clust_step)[0x86d84d] ??:0(row_upd_step)[0x86e22e] ??:0(que_run_threads)[0x9577a8] ??:0(que_eval_sql)[0x957ea6] ??:0(row_drop_table_for_mysql)[0x85ae6a] ??:0(ha_innobase::delete_table(char const*))[0x8424e3] ??:0(ha_delete_table(THD*, handlerton*, char const*, char const*, char const*, bool))[0x6d5233] ??:0(mysql_rm_table_no_locks(THD*, TABLE_LIST*, bool, bool, bool, bool))[0x5ff928] ??:0(mysql_rm_table(THD*, TABLE_LIST*, char, char))[0x60001d] ??:0(mysql_execute_command(THD*))[0x58ad90] ??:0(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x58e369] ??:0(dispatch_command(enum_server_command, THD*, char*, unsigned int))[0x58f790] ??:0(do_handle_one_connection(THD*))[0x647cdf] ??:0(handle_one_connection)[0x647d7c] ??:0(??)[0x30a7c07851] ??:0(??)[0x30a78e811d] Trying to get some variables. Some pointers may be invalid and cause the dump to abort. Query (0x7f5db800afa8): is an invalid pointer Connection ID (thread ID): 2 Status: NOT_KILLED Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=off 2 - Error when attempting to recreate table 150119 17:15:22 InnoDB: Operating system error number 2 in a file operation. InnoDB: The error means the system cannot find the path specified. InnoDB: If you are installing InnoDB, remember that you must create InnoDB: directories yourself, InnoDB does not create them. 150119 17:15:22 InnoDB: Error: trying to open a table, but could not InnoDB: open the tablespace file './moodle_sand/mdl_tag_correlation.ibd'! InnoDB: Have you moved InnoDB .ibd files around without using the InnoDB: commands DISCARD TABLESPACE and IMPORT TABLESPACE? InnoDB: It is also possible that this is a temporary table #sql..., InnoDB: and MySQL removed the .ibd file for this. InnoDB: Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.5/en/innodb-troubleshooting-datadict.html InnoDB: for how to resolve the issue. -- martin.langhoff(a)gmail.com - ask interesting questions - don't get distracted with shiny stuff - working code first ~ http://docs.moodle.org/en/User:Martin_Langhoff

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[Maria-discuss] 10.0.x: [Warning] Unsafe statement written to the binary log using statement format
by Reindl Harald 19 Jan '15

19 Jan '15

uhm - binlog-format = ROW since at least 5 years everywhere how does 10.0.x come to the crazy idea it is "BINLOG_FORMAT = STATEMENT"? 150119 22:07:52 [Warning] Unsafe statement written to the binary log using statement format since BINLOG_FORMAT = STATEMENT. The statement is unsafe because it uses the general log, slow query log, or performance_schema table(s). This is unsafe because system tables may differ on slaves. Statement: repair table `mysql`.`column_stats`, `mysql`.`columns_priv`, `mysql`.`db`, `mysql`.`event`, `mysql`.`func`, `mysql`.`general_log`, `mysql`.`help_category`, `mysql`.`help_keyword`, `mysql`.`help_relation`, `mysql`.`help_topic`, `mysql`.`host`, `mysql`.`index_stats`, `mysql`.`ndb_binlog_index`, `mysql`.`plugin`, `mysql`.`proc`, `mysql`.`procs_priv`, `mysql`.`proxies_priv`, `mysql`.`roles_mapping`, `mysql`.`servers`, `mysql`.`slow_log`, `mysql`.`table_stats`, `mysql`.`tables_priv`, `mysql`.`time_zone`, `mysql`.`time_zone_leap_second`, `mysql`.`time_zone_name`, `mysql`.`time_zone_transition`, `mysql`.`time_zone_transition_type`, `mysql`.`user`

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[Maria-discuss] build minimized MariaDB 10.0.x
by Reindl Harald 19 Jan '15

19 Jan '15

https://mariadb.atlassian.net/browse/MDEV-7076 well, in general i try to only have Aria/XtraDB/MyISAM -DWITH_XTRADB_STORAGE_ENGINE=ON \ -DWITH_PARTITION_STORAGE_ENGINE=ON \ -DWITH_ARCHIVE_STORAGE_ENGINE=OFF \ -DWITH_BLACKHOLE_STORAGE_ENGINE=OFF \ -DWITH_SPHINX_STORAGE_ENGINE=OFF \ -DWITH_MROONGA_STORAGE_ENGINE=OFF \ -DWITH_OQGRAPH_STORAGE_ENGINE=OFF \ -DWITH_SPIDER_STORAGE_ENGINE=OFF \ -DWITH_CASSANDRA_STORAGE_ENGINE=OFF \ but OOM in context of "mroonga" i want my ./configure --help back while in other aspects cmake is really cool there is no way i know to get a list of valid configure options :-( /usr/bin/ranlib libsql.a make[2]: Leaving directory `/home/builduser/rpmbuild/BUILD/mariadb-10.0.15' /usr/bin/cmake -E cmake_progress_report /home/builduser/rpmbuild/BUILD/mariadb-10.0.15/CMakeFiles 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 make[2]: Leaving directory `/home/builduser/rpmbuild/BUILD/mariadb-10.0.15' make[1]: *** [storage/mroonga/vendor/groonga/lib/CMakeFiles/libgroonga.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... [ 99%] Built target sql make[1]: Leaving directory `/home/builduser/rpmbuild/BUILD/mariadb-10.0.15'

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[Maria-discuss] Spider - query end
by Nicolas Payart 12 Jan '15

12 Jan '15

Hi list, I am using Spider Storage Engine for sharding data and remote access to some innodb tables on 3 different MariaDB 10.0.14 instances. It performs quite well in production except that sometimes, some queries (a minority of them fortunately) do not respond and stay indefinitely in "query end" state in processlist. What can make a query stay indefinitely in "query end" state? Maybe a bug in Spider Storage Engine? Any advice is welcome! Some more details: db01 =# show full processlist\G *************************** 4. row *************************** Id: 1699242 User: np Host: 10.0.0.1:24220 db: db01 Command: Query Time: 155777 State: query end Info: SELECT s.id,s.title,sum(s.cpt) AS sumcpt FROM s INNER JOIN u ON u.id = s.u_id INNER JOIN d ON s.d_id = d.id WHERE u.str = 'abc123456' AND d.str = 'def456789' GROUP BY s.title ORDER BY sumcpt DESC LIMIT 0,10 Progress: 0.000 About tables used in query: s is a spider table pointing on 24 innodb shards over 3 remote servers (PARTITION BY LIST (mod(id,24))) u is a spider table referencing one remote innodb table (not sharded, millions rows) d is a spider table referencing one remote innodb table (not sharded, <100 rows) Spider config: (none) =# show variables like 'spider%'; +---------------------------------------+--------+ | Variable_name | Value | +---------------------------------------+--------+ | spider_auto_increment_mode | -1 | | spider_bgs_first_read | -1 | | spider_bgs_mode | -1 | | spider_bgs_second_read | -1 | | spider_bka_engine | | | spider_bka_mode | -1 | | spider_block_size | 16384 | | spider_bulk_size | -1 | | spider_bulk_update_mode | -1 | | spider_bulk_update_size | -1 | | spider_casual_read | 1 | | spider_conn_recycle_mode | 1 | | spider_conn_recycle_strict | 0 | | spider_connect_mutex | OFF | | spider_connect_retry_count | 1000 | | spider_connect_retry_interval | 1000 | | spider_connect_timeout | 10 | | spider_crd_bg_mode | 1 | | spider_crd_interval | 4 | | spider_crd_mode | 1 | | spider_crd_sync | 0 | | spider_crd_type | -1 | | spider_crd_weight | -1 | | spider_delete_all_rows_type | -1 | | spider_direct_dup_insert | 1 | | spider_direct_order_limit | -1 | | spider_dry_access | OFF | | spider_error_read_mode | -1 | | spider_error_write_mode | -1 | | spider_first_read | -1 | | spider_force_commit | 1 | | spider_general_log | OFF | | spider_init_sql_alloc_size | -1 | | spider_internal_limit | -1 | | spider_internal_offset | -1 | | spider_internal_optimize | -1 | | spider_internal_optimize_local | -1 | | spider_internal_sql_log_off | ON | | spider_internal_unlock | OFF | | spider_internal_xa | OFF | | spider_internal_xa_id_type | 0 | | spider_internal_xa_snapshot | 0 | | spider_local_lock_table | OFF | | spider_lock_exchange | OFF | | spider_log_result_error_with_sql | 0 | | spider_log_result_errors | 0 | | spider_low_mem_read | -1 | | spider_max_order | -1 | | spider_multi_split_read | -1 | | spider_net_read_timeout | 30 | | spider_net_write_timeout | 60 | | spider_ping_interval_at_trx_start | 3600 | | spider_quick_mode | -1 | | spider_quick_page_size | -1 | | spider_read_only_mode | -1 | | spider_remote_access_charset | | | spider_remote_autocommit | 0 | | spider_remote_default_database | | | spider_remote_sql_log_off | 1 | | spider_remote_time_zone | | | spider_remote_trx_isolation | -1 | | spider_reset_sql_alloc | 0 | | spider_same_server_link | ON | | spider_second_read | -1 | | spider_select_column_mode | -1 | | spider_selupd_lock_mode | -1 | | spider_semi_split_read | -1 | | spider_semi_split_read_limit | -1 | | spider_semi_table_lock | 1 | | spider_semi_table_lock_connection | -1 | | spider_semi_trx | ON | | spider_semi_trx_isolation | -1 | | spider_skip_default_condition | -1 | | spider_split_read | -1 | | spider_sts_bg_mode | -1 | | spider_sts_interval | -1 | | spider_sts_mode | -1 | | spider_sts_sync | 0 | | spider_support_xa | OFF | | spider_sync_autocommit | OFF | | spider_sync_time_zone | OFF | | spider_sync_trx_isolation | OFF | | spider_table_init_error_interval | 1 | | spider_udf_ct_bulk_insert_interval | -1 | | spider_udf_ct_bulk_insert_rows | -1 | | spider_udf_ds_bulk_insert_rows | -1 | | spider_udf_ds_table_loop_mode | -1 | | spider_udf_ds_use_real_table | -1 | | spider_udf_table_lock_mutex_count | 20 | | spider_udf_table_mon_mutex_count | 20 | | spider_use_all_conns_snapshot | OFF | | spider_use_consistent_snapshot | OFF | | spider_use_default_database | ON | | spider_use_flash_logs | OFF | | spider_use_handler | 0 | | spider_use_pushdown_udf | -1 | | spider_use_snapshot_with_flush_tables | 0 | | spider_use_table_charset | -1 | | spider_version | 3.2.11 | +---------------------------------------+--------+ 99 rows in set (0.00 sec) -- Nicolas Payart

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[Maria-discuss] future of SHOW ENGINE INNODB MUTEX in MariaDB
by Federico Razzoli 12 Jan '15

12 Jan '15

Hi! Morgan Tocker asked the community's opinions about SHOW ENGINE INNODB MUTEX: http://www.tocker.ca/2013/11/28/show-engine-innodb-mutex.html Despite these opinions, as Valerii Kravchuk notes on Facebook, the command disappeared in the latest 5.7 release. He also notes that the command has never been deprecated (!). Question is: will MariaDB preserve this command? Frankly, I don't know any other convenient way to obtain the same information... Regards, Federico

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[Maria-discuss] The relay-log is not fluashed after the slave-relay-log.999999 showed
by Gmail 07 Jan '15

07 Jan '15

Hello, dear users. I am using MariaDB 10.0.14 at CentOS 6.5. And, as I mentioned at the title of this question, the relay-log is not flushed after the slave-relay-log.999999 showed when using "Salve_parallel_threads:10" setting. like showed blow. - binlog_format: ROW - Slave_parallel_threads:10 Everything are working fine except the "slave-relay-log.******" files continue to exist at the disk which will finally cause the disk full. If I change the value of Slave_parallel_threads setting from 10 to 0, the log will be flushed. Howevery "PK duplicate warning" error logs come next. Is there any setting should be used with Slave_parallel_threads setting? Any help will be great. Best regareds, - Jasung

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[Maria-discuss] MariaDB Galera Cluster 5.5.41 now available
by Daniel Bartholomew 06 Jan '15

06 Jan '15

The MariaDB project is pleased to announce the immediate availability of MariaDB Galera Cluster 5.5.41 This is a Stable (GA) release. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB Galera Cluster 5.5.41 - Release Notes: https://mariadb.com/kb/en/mariadb-galera-cluster-5541-release-notes - Changelog: https://mariadb.com/kb/en/mariadb-galera-cluster-5541-changelog - Downloads: https://downloads.mariadb.org/mariadb-galera/5.5.41 About MariaDB Galera Cluster: - https://mariadb.com/kb/en/what-is-mariadb-galera-cluster/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/en/donate/ - http://www.cafepress.com/mariadb We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] Newbie Question - Multi-Master vs Cluster
by Stuart Elvish 06 Jan '15

06 Jan '15

Hi all, Up until now we have only directly managed stand alone MySQL instances. For clusters (MySQL) we have used a contractor to build and administrate the clusters. Our current product development requirements and good business practice (high availability of critical databases) now dictate that we move to a multi-server setup. Our goal is to setup at least two servers which will have the same data at all times and which are at separate sites so if the link between the sites goes down, the cell of servers at that site can keep operating. Our database stores text fields and blobs of audio recordings. We read data (SELECT with a WHERE) for 90-95% of our queries, some tables can be populated with hundreds of thousand of rows but normally far fewer. The software we are running which interacts with the database is smart enough to figure out if one of the database servers it is trying to reach is not responding and will hunt through a list of IP's until it successfully connects. I have a couple of questions as this will be our first cluster. (I don't think multi-master will meet our requirements based on the examples available online so I have chosen MariaDB 10 with Galera.) How often is complex management (manual intervention) required such as adding a node back into the cluster after communications between the nodes fails and then is restored? Is it normal, say 90% of the time, for syncing to re-establish automatically? What type of monitoring tools are advised? (Or is it as simple as automatically parsing logs to find errors?) The documented recommendation is 3 servers; we don't have the hardware at the moment so is it ok to start with 2 and add an additional database server at a later time? Alternatively, we could use 2 dedicated servers and 1 virtual server but the documentation states that the cluster only works as quickly as the slowest node. Is that only if you are running queries against the slowest node? Or if you are writing to the slowest node? I am assuming we can run the arbiter (garbd) on one of the existing data nodes. I am assuming we can use the SSL options in the configuration file to secure communication between the servers so if it was sniffed it would not be possible to decode the data. Does anyone have any comments on if this affects reliability? Thank you for any input you have on these questions. Please feel free to ask if you want clarification on anything.

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[Maria-discuss] Oracle sets 'tone' and standard/level of discussion
by Peter Laursen 05 Jan '15

05 Jan '15

http://mysqlrelease.com/2014/12/official-mysql-repos-for-suse-linux/ "Regarding SUSE Linux Enterprise 12, SUSE unfortunately chose to not provide users with a mature and robust version of MySQL as part of the distro," https://www.suse.com/releasenotes/x86_64/SUSE-SLES/12/#fate-316482 "The MariaDB open source database replaces the MySQL database system." I also posted this comment (don't know it it will be approved) *“Regarding SUSE Linux Enterprise 12, SUSE unfortunately chose to not provide users with a mature and robust version of MySQL as part of the distro .. ”* *https://www.suse.com/releasenotes/x86_64/SUSE-SLES/12/#fate-316482 <https://www.suse.com/releasenotes/x86_64/SUSE-SLES/12/#fate-316482>“The MariaDB open source database replaces the MySQL database system.”* *Maybe rather Oracle should try to understand *WHY” almost all recent Linux distros (as well as most major web2 companies) have switched to MariaDB.* *One important reason is that the public bug-tracker for Oracle/MySQL is incomplete. This was the most stupid thing Oracle ever did to MySQL and it is completely unacceptable in the open-source world. Another reason is that patches that are released as strictly GPL cannot be included in Oracle/MySQL. MariaDB can freely use such patches – primarily from major web2 companies (Google,Facebook etc.) – and they are doing and we have only seen the beginning.* *@guys .. soon time to find another employer!* -- Peter -- Webyog

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[Maria-discuss] Does MariaDB support 2 level replication and crash recover from such situation?
by 司同 30 Dec '14

30 Dec '14

Hi, all I am working on MariaDB with replication topology A->B->C, in which B is the slave of A and also the master of C, thus C contains data of both A and B. and A, B would be modified by application, while C be read only. now let B crash, I alter A to let it be the new master of C, and this time C would be modified by application. then after a period of time, B restart, this time I need let C be the master of B, and I need B has the same data with A and C, thus the topology change from A->B->C to A->C->B. Does this be possible? (I set skip-slave-start for all servers.) Regards.

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[Maria-discuss] Best way to find out what function(s) generate the value of the VIRTUAL/PERSISTENT column.
by Abhishek Kumar Pandey 29 Dec '14

29 Dec '14

Hi, I need to find out the function(s) which generate the value of VIRTUAL/PERSISTENT column. According to documentation here- https://mariadb.com/kb/en/mariadb/documentation/sql-commands/data-definitio… I have to use *SHOW CREATE TABLE.. *to get the definition. It is doable of course but It involves painful parsing of returned create table statement to get the required function(s)( As I want to display them in GUI client.) This function(s) is not returned in *show full fields from... *and I can't find any relevant information in INFORMATION_SCHEMA also. So my question is- Is there any better way of getting this information other than using SHOW CREATE TABLE.. and do parsing? or is it the only way of accomplishing it? Regards, Abhishek.

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[Maria-discuss] 5.5.x vs 10.x
by Tanstaafl 29 Dec '14

29 Dec '14

So, thinking of building a totally new server from scratch on a new vmWare host for playing around, and was curious of the differences. Is 5.5 still being maintained just because it is the last major stable version before 10.x? But then isn't 10.x the way forward? Is 10.x still considered a drop-in replacement for MySQL? Thanks, Charles

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[Maria-discuss] mariadb galera and storage engines
by Federico Razzoli 26 Dec '14

26 Dec '14

Hi! Galera claims that it only supports InnoDB tables (and MyISAM, experimentally). What about storage engines that add functionalities upon another table? For example, can I have a Mroonga or OQGRAPH or CONNECT/PROXY table built over an InnoDB table? As far as I understand this should be supported, since InnoDB will handle transactions. But did anyone test this? Regards Federico

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[Maria-discuss] All MariaDB ebooks on sale
by Daniel Bartholomew 22 Dec '14

22 Dec '14

FYI: All MariaDB ebooks from Packt are on sale now through 6 Jan 2015. $5 each. (Actually, all of their ebooks are on sale, not just the MariaDB ones.) https://www.packtpub.com/all/?search=mariadb It's not as good of a deal as when they had the book giveaway last week, but it's for all titles this time around. :-) Happy Holidays everyone! -- Daniel Bartholomew, MariaDB Release Manager MariaDB | http://mariadb.com

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[Maria-discuss] MariaDB 5.5.41 now available
by Daniel Bartholomew 22 Dec '14

22 Dec '14

The MariaDB project is pleased to announce the immediate availability of MariaDB 5.5.41 This is a Stable (GA) release. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 5.5.41 - Release Notes: https://mariadb.com/kb/en/mariadb-5541-release-notes - Changelog: https://mariadb.com/kb/en/mariadb-5541-changelog - Downloads: https://downloads.mariadb.org/mariadb/5.5.41 About MariaDB 5.5: - https://mariadb.com/kb/en/what-is-mariadb-55/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/en/donate/ - http://www.cafepress.com/mariadb We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] MariaDB OpenSuSE repo does not resolve all conflicts if KDE programs are installed.
by Peter Laursen 17 Dec '14

17 Dec '14

I have written about this in another thread. But let us take it from scratch. The other thread is messy. The problem is KDE and certain KDE programs. Quite a lot of those have an option to store data in MySQL (embedded or not) and they install dependent libraries in order to do so. Do this to reproduce and understand the problem: 1) Install OpenSUSE with a GUI. I used xfce desktop, but it should be the same with any destop not based on KDE (with KDE and KDE-derivates, it could be more complicated) 2) During install also install the "LAMP Server". Probably just installing MariaDB 10.10.14 from SuSE's repos later will also do. 3) Now install Amarok (for instance). Inspect dependencies being installed - including two MySQL-related libraries. I used the GUI for install but probably zypper has a --verbose option listing dependencies. See dependencies.jpg. 4) Register MariaDB's repo for SuSE '. See repos.jpg 5) Open "Software management" and search for MariaDB . See packages.jpg 6) MariaDB's RPMs do not resolve dependencies on libraries installed with Amarok (see conflict.jpg). 7) But you can do manually - if using the GUI at least (as in conflicts_resolved.jpg). Now everything installs and works fine after install. If you don't do it right first time (later is too late!) you will encounter issues. For instance I was only able to use command line clients as root. This is reproducible exactly the same way with OpenSuSE 12.3 GA as well as the 'bleeding edge' "OpenSuSE factory". Should not those dependencies be resolved automatically? -- Peter -- Webyog

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[Maria-discuss] New Question: 10.0.15 missing from this list
by AskMonty KB 16 Dec '14

16 Dec '14

Hello, A new question has been asked in "MariaDB Galera 10.0 Release Notes" by daniel-black. Please answer it at http://mariadb.com/kb/en/10015-missing-from-this-list/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- Can't see 10.0.15 on this page despite it existing -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/10015-missing-from-this-list/

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[Maria-discuss] Getting Started with MariaDB, free today
by Daniel Bartholomew 16 Dec '14

16 Dec '14

FYI, the electronic version of my book, Getting Started with MariaDB, is FREE today (16 Dec) as part of Packt's "Christmas Countdown" promotion. DRM free as well, in pdf, mobi, and epub formats. :-) https://www.packtpub.com/packt/offers/christmas-countdown Happy holidays everyone! -- Daniel Bartholomew, MariaDB Release Manager MariaDB | http://mariadb.com

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[Maria-discuss] Doubt about 'atomic' insert
by Roberto Spadim 15 Dec '14

15 Dec '14

Hi guys i'm with a doubt about the "standard" (sql standand?) error reporting , about INSERT SELECT... should this insert select return duplicate key? INSERT INTO errorsX (id) SELECT MAX(id)+1 FROM errorsX; considering: ---- CREATE TABLE errorsX( id INT NOT NULL DEFAULT 0, PRIMARY KEY (id) ) ; ---- -- Roberto Spadim SPAEmpresarial Eng. Automação e Controle

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[Maria-discuss] the future of --skip-innodb
by Federico Razzoli 14 Dec '14

14 Dec '14

Hi. In MySQL 5.7 documentation: https://dev.mysql.com/doc/refman/5.7/en/innodb-parameters.html I read: "As of MySQL 5.7.5, the InnoDB storage engine can no longer be disabled, and the --innodb=OFF and --skip-innodb options are deprecated and have no effect. Their use results in a warning. These options will be removed in a future MySQL release." Will MariaDB remove --skip-innodb? If so, when? Regards Federico

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[Maria-discuss] mariadb 10 build/link ignores specified linker path to specified lib (pcre). correct method?
by grantksupport＠operamail.com 13 Dec '14

13 Dec '14

building mariadb 10.0.15 on linux/64 i have a non-system instance of (lib)pcre, installed in /usr/local/test/pcre, that i need to build/link against reading Link MariaDB Client Library for C with specific external zlib and openssl https://mariadb.com/kb/en/mariadb/client-libraries/client-library-for-c/lin… i've built with cmake .. \ ... -DCMAKE_C_FLAGS="... -I/usr/local/test/pcre/includes" \ -DCMAKE_CXX_FLAGS="... -I/usr/local/test/pcre/includes" \ -DCMAKE_SHARED_LINKER_FLAGS="... -L/usr/local/test/pcre/lib64 -lpcre" \ ... and cmake .. \ ... -DCMAKE_C_FLAGS="... -I/usr/local/test/pcre/includes" \ -DCMAKE_CXX_FLAGS="... -I/usr/local/test/pcre/includes" \ -DCMAKE_SHARED_LINKER_FLAGS="... -L/usr/local/test/pcre/lib64 -Wl,-rpath,/usr/local/test/pcre/lib64 -lpcre " \ ... but id both cases, the resultant binary still links against system pcre libs ldd sql/mysqld | egrep -i "pcre" libpcre.so.1 => /usr/lib64/libpcre.so.1 (0x00007f6165a5e000) what's the correct method for linking against a specified, non-system path'd lib? specifically, here, libpcre?

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[Maria-discuss] New Question: TokuDB
by AskMonty KB 13 Dec '14

13 Dec '14

Hello, A new question has been asked in "Development" by timosaarinen. Please answer it at http://mariadb.com/kb/en/tokudb/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- We noticed, that MariaDB includes TokuDB engine too nowadays. We have read, that it should be more high-performance than the default one. We are curious to know, what's the reason, it's not the default engine in MariaDB. Is it ready for production use? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/tokudb/

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[Maria-discuss] New Question: MaxScale Customisation - Filter, Routing of Clients, "Sticky" Statements
by AskMonty KB 11 Dec '14

11 Dec '14

Hello, A new question has been asked in "MariaDB community" by moshpit. Please answer it at http://mariadb.com/kb/en/maxscale-customisation-filter-routing-of-clients-s… as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hey guys, I am with a company that provides services and develops software for shipping companies. We usually deploy our web applications on our own infrastructure. I've been dealing with MariaDB and MaxScale for 2 weeks now and I'd say I do have a pretty good overview of whats going on. I already set up a demo environment with 1 master, 3 slaves, 1 client and 1 MaxScale proxy. Since we want to use MariaDB and MaxScale in production environments when it gets out of the Beta state, I am trying to test this technology for some requirements we have. This one might be rather tricky than trivial, though I wanted to discuss this here because I am having struggle setting it up the way I want. If you need more information on the requirements itself let me know so I can figure out if I can provide you with a more detailed description. Requirement: Our web applications excessively use temporary tables. This means, a lot of tables are generated on-the-fly and used within a session. They are deleted by cronjobs after a specified period of time (or after the current http session was closed/invalidated/timed out). The web applications then use these temporary tables to join them with persistent tables on the databases to generate reports. Usually, the table names of temporary tables are named somewhat similar to __tmp_<number>__ . The last part of those table names are equal to a part of the URL of the web application within the “session_id=” variable. For example: + URL: https://url.to.web.app./session_id=123 + temporary table name: __tmp_123 So, depending on the variable “session_id=” in the URL of the application the names of the temporary tables gets generated dynamically from within the application. To reduce network overhead, throughput decrease and other performance parameters, we do not want those tables to be replicated to the slaves. But we do not as well want to have all the read/write load for those temporary tables on one single master machine. So, this is when a multi-master setup comes on the plan. And with it the question on filters and how to manage and distribute the load on the available master servers. Suggestion: Supposing we have 4 master servers (master_00, master_01, master_02 and master_03). Supposing they are set up in a multi-master replication setup. Supposing we use MaxScale as the respective proxy for routing the requests. When a client sends one of those MySQL statements that create or read from a temporary table, we could use the RegEx filter to route the client to specific master machines (not slaves, since write statements are redirected to master servers in any case). Excluding the temporary tables from replication in the server configuration might be mandatory here. Questionnaire: Since the names of those temporary tables are unique throughout their lifecycle (meaning the name could be used again in another session after the table currently holding the name is being deleted), it might come in handy to do an operation such as: Table name: __tmp_<number>__ Operation: <number> MOD x (x being the number of master servers in the cluster) For example: <number> = 6091073567508922368; Number of master servers: 8  Resolves in 6091073567508922368 MOD 4 = 0, so the request gets routed to master_00 (assuming we start counting on 0 for the number of master servers) Regarding the (RegEx) filter, these questions come to mind: + Is it possible to do mathematic operations such as Modulo within the filter definition? + Is it possible to retrieve the number of current master servers being a member of the cluster from within the filter definition? + Is it possible to dynamically build the filter definitions with a script and inject them into a running MaxScale implementation or does MaxScale need to be restarted after changing the configuration? + What happens when one of the masters dies? + Is it possible to have join statements spread over multiple servers? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/maxscale-customisation-filter-routing-of-clients-s…

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[Maria-discuss] What happened to 10.1 downloads
by Peter Laursen 10 Dec '14

10 Dec '14

Not listed here: https://downloads.mariadb.org/ -- Peter -- Webyog

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[Maria-discuss] MariaDB 10.0.15 now available
by Daniel Bartholomew 10 Dec '14

10 Dec '14

The MariaDB project is pleased to announce the immediate availability of MariaDB 10.0.15 This is a Stable (GA) release. See the Release Notes and Changelog for details. - - Links - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - MariaDB 10.0.15 - Release Notes: https://mariadb.com/kb/en/mariadb-10015-release-notes - Changelog: https://mariadb.com/kb/en/mariadb-10015-changelog - Downloads: https://downloads.mariadb.org/mariadb/10.0.15 About MariaDB 10.0: - https://mariadb.com/kb/en/what-is-mariadb-100/ APT and YUM Repository Configuration Generator: - https://downloads.mariadb.org/mariadb/repositories/ - - MariaDB Webinars - - - - - - - - - - - - - - - - - - - - - - - - - There are several upcoming MariaDB-focused webinars and many previously held ones available to watch on an on-demand basis at: - https://mariadb.com/news-events/webinars - - MariaDB Books - - - - - - - - - - - - - - - - - - - - - - - - - - There is an ever-growing library of MariaDB books available to help you get the most out of MariaDB. See the MariaDB Books page for details and links: - https://mariadb.com/kb/en/mariadb/books/ - - User Feedback plugin - - - - - - - - - - - - - - - - - - - - - - - MariaDB includes a User Feedback plugin. This plugin is disabled by default. If enabled, it submits basic, completely anonymous MariaDB usage information. This information is used by the developers to track trends in MariaDB usage to better guide development efforts. If you would like to help make MariaDB better, please add "feedback=ON" to your my.cnf or my.ini file! See http://mariadb.com/kb/en/user-feedback-plugin for more information. - - Quality - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - The project always strives for quality, but in reality, nothing is perfect. Please take time to report any issues you encounter at: - http://mariadb.org/jira - - Support MariaDB - - - - - - - - - - - - - - - - - - - - - - - - - - If you would like to contribute to the MariaDB Foundation, please see the "contributing" and "donations" pages. We also have merchandise available in a cafepress store. All proceeds go to support the MariaDB Foundation. - https://mariadb.com/kb/en/contributing - https://mariadb.org/en/donate/ - http://www.cafepress.com/mariadb We hope you enjoy MariaDB! -- MariaDB Website - http://mariadb.org Twitter - http://twitter.com/mariadb Google+ - http://google.com/+mariadb Facebook - http://fb.com/MariaDB.dbms Knowledge Base - http://mariadb.com/kb

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[Maria-discuss] New Question: Memory Instrumentaion
by AskMonty KB 10 Dec '14

10 Dec '14

Hello, A new question has been asked in "MariaDB community" by paskalkarsenti. Please answer it at http://mariadb.com/kb/en/memory-instrumentaion/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hello, Is there a way to enable Memory instrumentation in performance_schema.setup_instruments ? Thanks for your help -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/memory-instrumentaion/

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[Maria-discuss] Converting the whole database and tables from one charset+collation to another
by Honza Horak 10 Dec '14

10 Dec '14

Google does not provide any source I would be sure of, many different approaches.. so rather asking here.. Given I have a database with latin1 and some latin* collation, the same for tables and I want to convert database, tables and data to utf8. Are the following two commands really all I need to do? I mean if that is really enough to change the data as well.. ALTER DATABASE db_name DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci; ALTER TABLE db_table CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci; Thanks ahead for clarification. Honza

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[Maria-discuss] New Question: MariaDB client/server (TCP) protocol
by AskMonty KB 07 Dec '14

07 Dec '14

Hello, A new question has been asked in "Geographic Features" by massimo.manca.pn. Please answer it at http://mariadb.com/kb/en/mariadb-clientserver-tcp-protocol/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hi, I am interested to interface embedded boards to MariaDB data bases. Actually I made some trials with Mysql and a LPC1769 based board. I am quite satisfied, the results are very good but there is a problem with the license of the Mysql TCP protocol that is released under GPL so... there is a problem to work with closed source applications. 1. I would like to know if client/server protocol is the same for MariaDB and MySql 2. I would like to know if client/server protocol for MariaDB is under GPL or LGPL 3. Is there any documentation about client/server protocol for MariaDB? Thank you very much and thank you also to fork MariaDB from MySQL, it is a better product. Massimo -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mariadb-clientserver-tcp-protocol/

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