June 2020 - discuss - lists.mariadb.org

[Maria-discuss] setting db root passwd failed now reinstall is failing
by ubuntu＠enabled.com 20 Jun '20

20 Jun '20

Hi there, I am doing a poor job installing mariadb. I need to install mariadb on a new ubunutu server. I attempted to set the root password and was having difficulties getting mariadb in a usable state after that. So I attempted a purge and reinstall of mariadb (same version). Now I cant start the daemon and I dont have a /var/lib/mysql directory anymore. What can I do? $ sudo mysql_secure_installation NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MariaDB SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY! In order to log into MariaDB to secure it, we'll need the current password for the root user. If you've just installed MariaDB, and you haven't set the root password yet, the password will be blank, so you should just press enter here. Enter current password for root (enter for none): ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) Enter current password for root (enter for none): ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) Enter current password for root (enter for none): ^^^ I dont know what this password is? Typing 'enter' doesnt work ~$ ls -l /var/lib/mysql* ls: cannot open directory '/var/lib/mysql-files': Permission denied ls: cannot open directory '/var/lib/mysql-keyring': Permission denied $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=20.04 DISTRIB_CODENAME=focal DISTRIB_DESCRIPTION="Ubuntu 20.04 LTS" ~$ sudo apt list --installed | grep mariadb WARNING: apt does not have a stable CLI interface. Use with caution in scripts. mariadb-client-10.3/focal,now 1:10.3.22-1ubuntu1 amd64 [installed,automatic] mariadb-client-core-10.3/focal,now 1:10.3.22-1ubuntu1 amd64 [installed,automatic] mariadb-common/focal,now 1:10.3.22-1ubuntu1 all [installed,automatic] mariadb-server-10.3/focal,now 1:10.3.22-1ubuntu1 amd64 [installed,automatic] mariadb-server-core-10.3/focal,now 1:10.3.22-1ubuntu1 amd64 [installed,automatic] mariadb-server/focal,now 1:10.3.22-1ubuntu1 all [installed] noah@nuc2:~$ sudo systemctl restart mariadb Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details. noah@nuc2:~$ systemctl status mariadb.service ● mariadb.service - MariaDB 10.3.22 database server Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Fri 2020-06-19 19:21:52 UTC; 4s ago Docs: man:mysqld(8) https://mariadb.com/kb/en/library/systemd/ Process: 548722 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (code=exited, status=0/SUCCESS) Process: 548733 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS) Process: 548736 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= || VAR=`/usr/bin/galera_recovery`; [ $? -eq 0 ] && systemctl set-environment _WSREP_START_POSITION=> Process: 548785 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION (code=exited, status=1/FAILURE) Main PID: 548785 (code=exited, status=1/FAILURE) Jun 19 19:21:51 nuc2 systemd[1]: Starting MariaDB 10.3.22 database server... Jun 19 19:21:52 nuc2 mysqld[548785]: 2020-06-19 19:21:52 0 [Note] /usr/sbin/mysqld (mysqld 10.3.22-MariaDB-1ubuntu1) starting as process 548785 ... Jun 19 19:21:52 nuc2 mysqld[548785]: 2020-06-19 19:21:52 0 [Warning] Can't create test file /var/lib/mysql/nuc2.lower-test Jun 19 19:21:52 nuc2 mysqld[548785]: [97B blob data] Jun 19 19:21:52 nuc2 mysqld[548785]: 2020-06-19 19:21:52 0 [ERROR] Aborting Jun 19 19:21:52 nuc2 systemd[1]: mariadb.service: Main process exited, code=exited, status=1/FAILURE Jun 19 19:21:52 nuc2 systemd[1]: mariadb.service: Failed with result 'exit-code'. Jun 19 19:21:52 nuc2 systemd[1]: Failed to start MariaDB 10.3.22 database server. Cheers, Noah

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[Maria-discuss] Doubts about temporal table
by Roberto Spadim 17 Jun '20

17 Jun '20

Hi folks Could be possible query temporal tables but instead of use a timestamp, use a “commit” id? For example query first commit, second, third, ... and the last commit = current table? Thanks -- Roberto Spadim SPAEmpresarial - Software ERP/Scada Eng. Automação e Controle, Eng. Financeira

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[Maria-discuss] CDC Adapter replacement
by Διονύσης Βυθούλκας 11 Jun '20

11 Jun '20

Hello, I recently started testing MariaDB Columnstore 1.2.5 and stumbled upon an error while using the MaxScale CDC Data Adapter (mxs_adapter). When I checked at jira.mariadb.org I realized the most recent tickets on mxs_adapter where closed with a 'won't fix' resolution, such as this: https://jira.mariadb.org/browse/MCOL-2037 Is there a replacement to it or another way to stream data from regular MariaDB instances to Columnstore instances? Thanks for any recommendations. dcv

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[Maria-discuss] Poor performance compared to MySQL
by Ling, Andy 03 Jun '20

03 Jun '20

I am looking at switching from MySQL to MariaDB and have been comparing the performance of the two. I am using the same databases on the same Windows machine and running queries using MySQL and MariaDB and I am finding that MariaDB is 6 times slower. A query that takes 5 seconds on MySQL is taking 28 seconds on MariaDB. I am hoping I have some configuration wrong, so I looking for some help to work out what needs changing. One of the problem queries is a join between two tables. Analyzing the query gives.. ANALYZE FORMAT=JSON SELECT r.rushid FROM rushes r LEFT JOIN browse b ON r.rushID = b.rushID WHERE b.rushID IS NULL AND r.updated < NOW() - INTERVAL 1 DAY; +------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ---------------------------------------------------------------------------------------+ | ANALYZE | +------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ---------------------------------------------------------------------------------------+ | { "query_block": { "select_id": 1, "r_loops": 1, "r_total_time_ms": 107974, "table": { "table_name": "r", "access_type": "ALL", "r_loops": 1, "rows": 784286, "r_rows": 784286, "r_total_time_ms": 245.5, "filtered": 100, "r_filtered": 100, "attached_condition": "r.updated < '2020-05-31 16:35:59'" }, "table": { "table_name": "b", "access_type": "ref", "possible_keys": ["rushid_start", "rushid"], "key": "rushid", "key_length": "96", "used_key_parts": ["rushID"], "ref": ["quentin_v3afp.r.rushID"], "r_loops": 784286, "rows": 10, "r_rows": 1, "r_total_time_ms": 106252, "filtered": 100, "r_filtered": 100, "attached_condition": "trigcond(b.rushID is null)", "using_index": true, "not_exists": true } } } | +------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ ---------------------------------------------------------------------------------------+ 1 row in set (1 min 48.244 sec) The table has been converted to the Aria engine from MyISAM. The my.ini file has had the following added/changed.. #Not using MyISAM so save memory key_buffer_size=64k #Setting to improve Aria performance aria_pagecache_buffer_size=4007M tmp_table_size=35M max_heap_table_size=35M Thanks for any help. Andy Ling ********************************************************************** DISCLAIMER: Privileged and/or Confidential information may be contained in this message. If you are not the addressee of this message, you may not copy, use or deliver this message to anyone. In such event, you should destroy the message and kindly notify the sender by reply e-mail. It is understood that opinions or conclusions that do not relate to the official business of the company are neither given nor endorsed by the company. Thank You.

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