- discuss - lists.mariadb.org

[Maria-discuss] New Question: my.cnf 128 GB RAM server
by AskMonty KB 11 Feb '16

11 Feb '16

Hello, A new question has been asked in "MariaDB Community" by wgn. Please answer it at http://mariadb.com/kb/en/mycnf-128-gb-ram-server/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- We are using /usr/share/lve/dbgovernor/db-select-mysql --mysql-version=mariadb101 Hello, As I see MySQL-governor and cl-MariaDB packages have already installed in your system. Could you please clarify what exactly doesn't work? Best regards, -- Anton Mashnin | L2 Technical Support Engineer CloudLinux.com | KernelCare.com [Free Trial] | KuberDock.com [Free Trial] It is work but make an issue ... we not know what is the best setting with our server 128GB RAM We use this http://www.gk-root.com/GK-Blog/optimize-mysql-apache-on-cpanelwhm-server/ Best config base on 8 core & 12GB memory (Shared server) MySQL 5.5: [mysqld] local-infile=0 max_connections = 600 max_user_connections=1000 key_buffer_size = 512M myisam_sort_buffer_size = 64M read_buffer_size = 1M table_open_cache = 5000 thread_cache_size = 384 wait_timeout = 20 connect_timeout = 10 tmp_table_size = 256M max_heap_table_size = 128M max_allowed_packet = 64M net_buffer_length = 16384 max_connect_errors = 10 concurrent_insert = 2 read_rnd_buffer_size = 786432 bulk_insert_buffer_size = 8M query_cache_limit = 5M query_cache_size = 128M query_cache_type = 1 query_prealloc_size = 262144 query_alloc_block_size = 65535 transaction_alloc_block_size = 8192 transaction_prealloc_size = 4096 max_write_lock_count = 8 slow_query_log log-error external-locking=FALSE open_files_limit=50000 [mysqld_safe] [mysqldump] quick max_allowed_packet = 16M [isamchk] key_buffer = 384M sort_buffer = 384M read_buffer = 256M write_buffer = 256M [myisamchk] key_buffer = 384M sort_buffer = 384M read_buffer = 256M write_buffer = 256M #### Per connection configuration #### sort_buffer_size = 1M join_buffer_size = 1M thread_stack = 192K -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mycnf-128-gb-ram-server/

1 0

[Maria-discuss] New Question: setNString method not implemented in PreparedStatement class
by AskMonty KB 11 Feb '16

11 Feb '16

Hello, A new question has been asked in "MariaDB Connector/J" by Sebastian_S. Please answer it at http://mariadb.com/kb/en/setnstring-method-not-implemented-in-preparedstate… as the person asking the question may not be subscribed to the mailing list. -------------------------------- Hi, I do not know if it proper place to ask something like that, but did not find better place. Recently I'd like to connect log4j2 to MariaDB database via MariaDB Connector/J (version 1.3.5, but tested each other). I could not do that and I found that reason is in connector - MariaDbServerPreparedStatement class does not implement method setNString and AbstractMariaDbPreparedStatement class throws exception "NStrings not supported". Why it is not supported. MariaDB does not support such type or it is just a bug? When I copied code form setString method to setNString then everything works properly. Regards, Sebastian -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/setnstring-method-not-implemented-in-preparedstate…

1 0

[Maria-discuss] New Question: MySQL connector bug with bulk insert ?
by AskMonty KB 10 Feb '16

10 Feb '16

Hello, A new question has been asked in "MariaDB Connector/J" by doortts. Please answer it at http://mariadb.com/kb/en/mysql-connector-bug-with-bulk-insert/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- I'm new to MariaDB and testing with some applications. Yesterday I met a wired bug. When I using bulk insert with MariaDB connector 1.3.4, following errors occur. (Ubuntu 14.4 and MariaDB 10.1.11) When I replace the connector driver with 'MySQL connector', It works fine. The reference Q&A was http://stackoverflow.com/questions/18693800/mariadb-jdbc-connection-fails-d… The reason that I call this bug is wired was, with same mariadb connector I haven't met bug in any other systems, Mac/Centos 6. Even more another ubuntu system MariaDB 10.1.10 with same driver, no error occurs. works fine: Linux ubuntu 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:45:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux Error occurred system: No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.3 LTS Release: 14.04 Codename: trusty Linux Yukino 3.16.0-57-generic #77~14.04.1-Ubuntu SMP Thu Dec 17 23:20:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux java version "1.8.0_66" Java(TM) SE Runtime Environment (build 1.8.0_66-b17) Java HotSpot(TM) 64-Bit Server VM (build 25.66-b17, mixed mode) Error message: ``` java.lang.NullPointerException at java.lang.String.getBytes(String.java:917) at org.mariadb.jdbc.internal.stream.PacketOutputStream.sendStream(PacketOutputStream.java:178) at org.mariadb.jdbc.internal.packet.dao.parameters.ReaderParameter.writeBinary(ReaderParameter.java:134) at org.mariadb.jdbc.internal.packet.send.SendPrepareParameterPacket.send(SendPrepareParameterPacket.java:93) at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executePreparedQuery(AbstractQueryProtocol.java:568) at org.mariadb.jdbc.MariaDbServerPreparedStatement.executeBatch(MariaDbServerPreparedStatement.java:230) at com.jolbox.bonecp.StatementHandle.executeBatch(StatementHandle.java:424) at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:1005) at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:989) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:644) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:673) at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:989) at data.DefaultExchanger.batchUpdate(DefaultExchanger.java:319) at data.DefaultExchanger.importDataFromArray(DefaultExchanger.java:307) at data.DefaultExchanger.importData(DefaultExchanger.java:255) at data.DataService.importData(DataService.java:196) at controllers.SiteApp.importData(SiteApp.java:314) at Routes$$anonfun$routes$1$$anonfun$applyOrElse$54$$anonfun$apply$54.apply(routes_routing.scala:2058) at Routes$$anonfun$routes$1$$anonfun$applyOrElse$54$$anonfun$apply$54.apply(routes_routing.scala:2058) at play.core.Router$HandlerInvokerFactory$$anon$4.resultCall(Router.scala:264) at play.core.Router$HandlerInvokerFactory$JavaActionInvokerFactory$$anon$15$$anon$1.invocation(Router.scala:255) at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:55) at Global$1.call(Global.java:190) at actions.AnonymousCheckAction.call(AnonymousCheckAction.java:57) at utils.SiteManagerAuthAction.call(SiteManagerAuthAction.java:39) at play.core.j.JavaAction$$anonfun$11.apply(JavaAction.scala:82) at play.core.j.JavaAction$$anonfun$11.apply(JavaAction.scala:82) at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:40) at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:46) at play.core.j.HttpExecutionContext.execute(HttpExecutionContext.scala:32) at scala.concurrent.impl.Future$.apply(Future.scala:31) at scala.concurrent.Future$.apply(Future.scala:485) at play.core.j.JavaAction$class.apply(JavaAction.scala:82) at play.core.Router$HandlerInvokerFactory$JavaActionInvokerFactory$$anon$15$$anon$1.apply(Router.scala:252) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:130) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:130) at play.utils.Threads$.withContextClassLoader(Threads.scala:21) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:129) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:128) at scala.Option.map(Option.scala:145) at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:128) at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:121) at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:483) at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:483) at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:519) at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:519) at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:496) at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:496) at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) org.springframework.transaction.TransactionSystemException: Could not roll back JDBC transaction; nested exception is java.sql.SQLNonTransientConnectionException: Could not send query: Last stream not finished at org.springframework.jdbc.datasource.DataSourceTransactionManager.doRollback(DataSourceTransactionManager.java:290) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:849) at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:826) at data.DefaultExchanger.importData(DefaultExchanger.java:266) at data.DataService.importData(DataService.java:196) at controllers.SiteApp.importData(SiteApp.java:314) at Routes$$anonfun$routes$1$$anonfun$applyOrElse$54$$anonfun$apply$54.apply(routes_routing.scala:2058) at Routes$$anonfun$routes$1$$anonfun$applyOrElse$54$$anonfun$apply$54.apply(routes_routing.scala:2058) at play.core.Router$HandlerInvokerFactory$$anon$4.resultCall(Router.scala:264) at play.core.Router$HandlerInvokerFactory$JavaActionInvokerFactory$$anon$15$$anon$1.invocation(Router.scala:255) at play.core.j.JavaAction$$anon$1.call(JavaAction.scala:55) at Global$1.call(Global.java:190) at actions.AnonymousCheckAction.call(AnonymousCheckAction.java:57) at utils.SiteManagerAuthAction.call(SiteManagerAuthAction.java:39) at play.core.j.JavaAction$$anonfun$11.apply(JavaAction.scala:82) at play.core.j.JavaAction$$anonfun$11.apply(JavaAction.scala:82) at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) at play.core.j.HttpExecutionContext$$anon$2.run(HttpExecutionContext.scala:40) at play.api.libs.iteratee.Execution$trampoline$.execute(Execution.scala:46) at play.core.j.HttpExecutionContext.execute(HttpExecutionContext.scala:32) at scala.concurrent.impl.Future$.apply(Future.scala:31) at scala.concurrent.Future$.apply(Future.scala:485) at play.core.j.JavaAction$class.apply(JavaAction.scala:82) at play.core.Router$HandlerInvokerFactory$JavaActionInvokerFactory$$anon$15$$anon$1.apply(Router.scala:252) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:130) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4$$anonfun$apply$5.apply(Action.scala:130) at play.utils.Threads$.withContextClassLoader(Threads.scala:21) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:129) at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$4.apply(Action.scala:128) at scala.Option.map(Option.scala:145) at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:128) at play.api.mvc.Action$$anonfun$apply$1.apply(Action.scala:121) at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:483) at play.api.libs.iteratee.Iteratee$$anonfun$mapM$1.apply(Iteratee.scala:483) at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:519) at play.api.libs.iteratee.Iteratee$$anonfun$flatMapM$1.apply(Iteratee.scala:519) at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:496) at play.api.libs.iteratee.Iteratee$$anonfun$flatMap$1$$anonfun$apply$14.apply(Iteratee.scala:496) at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) at akka.dispatch.TaskInvocation.run(AbstractDispatcher.scala:41) at akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:393) at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) Caused by: java.sql.SQLNonTransientConnectionException: Could not send query: Last stream not finished at org.mariadb.jdbc.internal.util.ExceptionMapper.get(ExceptionMapper.java:123) at org.mariadb.jdbc.internal.util.ExceptionMapper.throwException(ExceptionMapper.java:69) at org.mariadb.jdbc.MariaDbStatement.executeQueryEpilog(MariaDbStatement.java:261) at org.mariadb.jdbc.MariaDbStatement.execute(MariaDbStatement.java:290) at org.mariadb.jdbc.MariaDbStatement.execute(MariaDbStatement.java:344) at org.mariadb.jdbc.MariaDbConnection.rollback(MariaDbConnection.java:532) at com.jolbox.bonecp.ConnectionHandle.rollback(ConnectionHandle.java:1272) at org.springframework.jdbc.datasource.DataSourceTransactionManager.doRollback(DataSourceTransactionManager.java:287) ... 46 more Caused by: org.mariadb.jdbc.internal.util.dao.QueryException: Could not send query: Last stream not finished at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.sendQuery(AbstractQueryProtocol. ``` -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/mysql-connector-bug-with-bulk-insert/

1 0

[Maria-discuss] doubt how to create big query
by Roberto Spadim 09 Feb '16

09 Feb '16

hi guys i'm with a problem / possible feature request i have many tables with same structure (same fields) and i need to create a big query with all tables something like: select * from t1 union all select * from t2 union all select * from ..... ... union all select * from t99999 is there anyway to create a big query with some "template c++ like" feature? something like select * from <union all t1, t2, t3, t3, t4....> ? --- Roberto Spadim

2 4

[Maria-discuss] MariaDB/Galera Cluster with 3 nodes - Change ENGINE from MyISAM to InnoDB without crash
by Lukas Lehner 09 Feb '16

09 Feb '16

Hi http://dba.stackexchange.com/questions/128715/mariadb-galera-cluster-with-3… thanks Lukas

2 1

[Maria-discuss] New Question: How to change Innodb fileformat to Barracuda
by AskMonty KB 07 Feb '16

07 Feb '16

Hello, A new question has been asked in "XtraDB and InnoDB" by gijs. Please answer it at http://mariadb.com/kb/en/how-to-change-innodb-fileformat-to-barracuda/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- I've attempted to change to the new barracuda file format. I'm using a Galera cluster (MariaDB 10.1.11) and have innodb_file_format=Barracuda set on all my servers, I've rebooted the servers and exported a database with phpmyadmin. After this I deleted the database and recreated it and then imported the previously exported .sql file with phpmyadmin. I checked the file format in INFORMATION_SCHEMA.INNODB_SYS_TABLES and found that it's still set as Antelope. Why is it not set to Barracuda? How can I change it to Barracuda? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/how-to-change-innodb-fileformat-to-barracuda/

1 0

[Maria-discuss] MariaDB JIRA is moving
by Rasmus Johansson 05 Feb '16

05 Feb '16

The MariaDB JIRA instance that currently is in use for project and issue tracking will change. The current instance is hosted in Atlassian's cloud and it has worked well, but we have hit the maximum user limit of 2000 users. It's fantastic to see how many of you actually report bugs and other issues in the MariaDB project! To hit that limit also means that we have to migrate over to a self-hosted instance of JIRA. Below are important details about that change. When will the switch happen: Sat 27th of Feb What is the impact for me as a user of MariaDB's JIRA: 1. URL change - The current instance is hosted in Atalassian's cloud and has the URL mariadb.atlassian.net. The new one will be found at jira.mariadb.org starting from 28th of Feb. 2. RSS feeds - If you have been using JIRA's RSS feeds, you'll need to set up them again since the URL is changing What will happen to old JIRA: The mariadb.atlassian.net JIRA instance will be put into read-only mode and a banner will be visible on each page telling the URL of the new MariaDB JIRA instance. It will remain this way for some time since it has been referenced quite heavily from other sites. source: https://mariadb.org/mariadb-jira-is-moving/ -- Rasmus Johansson, VP Engineering MariaDB | t: +358 50 499 9589 | Skype: ratzpo

1 0

[Maria-discuss] intentionally corrupting tables
by Federico Razzoli 02 Feb '16

02 Feb '16

Hi all I am looking for a way to intentionally corrupt a table in a "natural" way. Of course I can open a file with Vim and change random characters, but I would probably obtain a kind of corruption that never occurs in the real world. The purpose is testing recovery procedures. Thanks Federico

3 2

[Maria-discuss] Adding timestamp column to a system
by Peter Mclarty 02 Feb '16

02 Feb '16

Hi All Running Mariadb 10.0.16 and need to add a timestamp column to a table with has around 60m rows Testing on lesser hardware instances suggest around 40 minutes to make this change on the production system. To reduce the down time I was planning to alter the slave and role swap the slave to become the master I have added the column to a test slave and notice it alway populates as Unix_epoch 0 ie no current timestamp date | timestamp 2016-01-29 | 0000-00-00 00:00:00 This sounds about right, but to confirm it's not a bug. Other than the timestamp value not being correct up to that time of making any changes, which is acceptable for why it is being added, like the role swap, is there any things to be concerned about if I follow that as an approach? The role swap was needing to be done soon anyway so that in itself isn't a stumpling block I know Percona has their tools that allow online schema changes, I have never used it in anger to achieve this sort of change. Would I be better off using that. Cheers -- *Peter McLarty* * DBA* -- Compare The Market is a brand and trading name of Compare The Market (Pty) Ltd (CTM). This email is for the intended addressee and is confidential and subject to copyright. If you are not the intended addressee, confidentiality has not been waived and any use, interference with, or disclosure of this email is unauthorised. If you are not the intended addressee please immediately notify CTM and then delete the email. CTM does not warrant that this email is error or virus free.

2 1

[Maria-discuss] New Question: Phenomenon of read-only queries performance
by AskMonty KB 02 Feb '16

02 Feb '16

Hello, A new question has been asked in "MariaDB Community" by knizhnik_g. Please answer it at http://mariadb.com/kb/en/phenomenon-of-read-only-queries-performance/ as the person asking the question may not be subscribed to the mailing list. -------------------------------- We are evaluating Galera cluster with MariaDB and find out interesting phenomenon which we can not explain. We are using standard sysbench compex-OLAP, 10 million records. Performance of read-only queries is about 3k TPS and is quite stable. But then we run for a while read-write version and after it once again read-only version, then in this case performance starts to grow from 4k till 10k TPS. 10K TPS is reached after about 30 seconds of running benchmark and stays at this level. But if we stop benchmark and restart it, then once again speed falls down to 3k TPS. Data is located in temporary file system, so disk is not involved at all. We used recommended configuration settings for MariaDB and Galera. Also the same behavior is observed with standalone mysql without Galera: performance of read-only queries varies from 3k to 6k TPS (but high values are smaller than with Galera, although no load balancing was performed). Is there any explanation of such behavior and where we can look trying to understand the reason? Why performance of standalone mysql can be slower than on Galera cluster? How we can tune it? -------------------------------- To view or answer this question please visit: http://mariadb.com/kb/en/phenomenon-of-read-only-queries-performance/

1 0