Questions tagged [percona]

Percona : MySQL open source fork with performance improvements

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13 views

replicate-wild-do-table causes unknown database error My-001049 for CREATE PROCEDURE on not replicated schema

OS: RHEL 7.7 Percona server 8.0.26-16 I am trying to create a simple replication topology with one master and one slave. The master has 9 schema out of which three are being replicated to the slave. ...
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15 views

Cannot prepare backup with innobackupex

I taken full backup from a Master server with innobackupex. Now I am restoring backup with innobackupex on a Slave server. I prepare backup with the command: innobackupex --defaults-file=/var/lib/...
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60 views

Unable to join new node to new percona cluster 8.0

I created a new cluster xtradb cluster 8.0. I bootstrapped the first node. When I try to join a node it fails. The donor error 211209 19:46:20 >> log scanned up to (10790811284585) xtrabackup: ...
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42 views

Improving performance for large volume of simultaneous reads/writes on Percona 8

A general description of the environment and the use case: Technical: We're running a distributed application with a single server and ~25 clients; each client is running ~75 threads. At one ...
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PHP PDO Connect sometimes takes a long time to connect using mysql percona

I have a more or less simple application, written in php 7.4, using PDO to connect to my database. This connect usually takes under 0.0002 seconds > we are talking about 99.9% of my requests. On ...
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321 views

Downgrade mysql 8.0.27 to 8.0.26 ubuntu 20.04

I set up a new AWS EC2 instance with Ubuntu 20.04, php, Apache, and mySQL. I also installed N-Able (Solarwinds) server backup. I am able to do system and file backups but the mySQL backup fails. N-...
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1answer
45 views

Drop column with percona does not shrink table size

I have a table in Aurora MySQL 5.7. table has few partitions with 800m rows and weights 2tb. Recently I dropped few column using percona. Surprisingly the table size did not change (looking in ...
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51 views

Steps to remove node from percona cluster

I have to update the os on a few servers and I need to remove a db from the cluster. wsrep_cluster_address='gcomm://192.168.2.59,192.168.2.60,192.168.2.61,192.168.2.62,192.168.2.63' Do I remove the ...
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30 views

MySQL8: xtrabackup Invalid stream argument: tar

I am using xtrabackup to take full backup and send it to another host as .tar file using the following backup command: xtrabackup --backup -u root -p --no-lock --compress --stream=tar --datadir=/...
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70 views

Install Percona Data Recovery Tool for InnoDB on Ubuntu 18

Has anyone successfully installed the Percona Data Recovery Tool for InnoDB on Ubuntu 18? I downloaded the tool here: https://launchpad.net/percona-data-recovery-tool-for-innodb/trunk/release-0.5/+...
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105 views

InnoDB: Assertion failure on executing select Query - MySQL 5.7.31

I am using pt-archiver for daily archiving of tables, but while selecting data from one tables I am getting following error and it restart mysql instance 2021-07-07 13:21:17 0x7fe0dffdc700 InnoDB: ...
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201 views

Importing A Database Into MySQL Has A Cluster System

I have a big issue. I want to import a database to mysql-server in a Centos 7 system. But there is a cluster structure on the servers. I set pxc_strict_mode=ENFORCING in wsrep.conf file. I have not to ...
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16 views

Percona MySQL: Restore incremental backup to a new server

I know it is possible to set up a new database instance on a new server, using a full backup that has been prepared. This is useful for several things, not least if your server has failed completely; ...
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110 views

Connect two Percona XtraDB Clusters in two data centers

I have been trying to figure this out the past couple of weeks. We used to have a five-host Percona cluster at different providers. When it started acting up I read that it is a bad idea to have ...
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1answer
400 views

ERROR 1180 (HY000): Got error 5 during COMMIT

We're using Galera cluster and I'm running below statement to make a new table: create table tab2 select distinct id , report from my_table ; It runs for sometime and after that it fails/cancel ...
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1answer
84 views

truncate table in mysql 8.0 is slower than older version

I have few hundreds of tests which use mysql. I was using Mysql 5.7 (percona) and I changed it to Mysql 8.0 . My problem is that before every test I truncate ALL my tables. This was fine with 5.7 but ...
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376 views

"Percona-XtraDB-Cluster prohibits use of ALTER command on a table (<example>) that resides in non-transactional storage engine"

I installed a Percona XtraDB cluster with pxc_strict_mode set to ENFORCING, and am trying to import databases from non-Galera MariaDB servers. This works fine for some databases, by dumping them via ...
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percona cluster victim thread on duplicate key updates

Recently, I've been getting this in the log and its creating chaos when not addressed. I totally understand the error, but what are the typical sources of this showing up in the cluster. I've been ...
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1answer
184 views

MySQL 8.0.20 - Master Replica scheme, increasing delay between Source and Replica

We have a Source Database of about 1TB, and a Replica on another server (similar architecture). We have setup Master Slave replication and delay between Master and Slave is always growing since. ...
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202 views

Proxysql setup for Percona PXC Multimaster cluster

I have a clean Ubuntu lab setup for PXC Cluster and Proxysql (each a separate VM)and i'm seeing this issue (error below). Is there a specific installation that needs to be followed for PXC cluster? I ...
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1answer
227 views

Can't restore master/slave replication from Percona backup (slave server)

A slave is restored from a master backup created with Percona xtrabackup On the master binlog is set to expire in 14 days and this backup is less than 24 hours old my.cnf (master) expire_logs_days = ...
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152 views

MySQL undo logs not truncating

I have MySQL Percona version 5.7, with 3 undo logs, but I don't know why truncating logs is not working. I enabled innodb_undo_log_truncate, decreased innodb_purge_rseg_truncate_frequency to 32 show ...
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3answers
511 views

Can I disable binlogs to save space temporarily

I am using percona mysql 8. I do not use any type of replication, but I read that binlogs are useful for data recovery. I would like to turn of binlogging and flush them while I run pt-online-schema-...
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153 views

MySQL 5.7 (Percona Server) PAM LDAP authentication from Workbench 8.0 on Windows

I have a server running Percona Server 5.7 and enabled PAM LDAP authentication. I can connect with LDAP user from: mysql client MySQL Workbench 8.0 on Linux (Ubuntu) with dialog.so plugin copied from ...
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48 views

Will Federated engine work with pxc cluster

I'm a bit new to MySQL specific settings and I can't find any hint/insight to this question. I have several Federated tables that work great for their current purpose, the rest of the database is in ...
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1answer
37 views

mysql percona 5.7 not releasing memory

we are using percona mysql 5.7 version. MySQL not releasing the memory after operation complete. we are very much grateful if anyone can guide us to resolve issue. Thanks
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77 views

Xtrabackup 8.0 Error

I'm using Percona MySQL 8.0.20 running on Ubuntu 18.04 on an AWS ec2 m5.2xlarge instance. The Xtrabackup version being used is 8.0.14. While testing the restore process, I'm getting the error as ...
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1answer
69 views

mysql client auto reconnect in case of ERROR 2013

I'm searching for a way how to instruct mysql client to reconnect in case of ERROR 2013. I'm testing PXC with ProxySQL and want to keep sql statements flowing from the client in case when the writer ...
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2answers
134 views

Monitoring slow queries on large database (Percona 5.6)

I am looking for a solution to monitor very large production database (many replicas, over 200 tables, some of tables have 10-50 GB of data) with a lot of traffic (a wide set of query complexity). The ...
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1answer
110 views

Need help with some recovery

So i've gone and did something terribly wrong out of haste and not thinking properly. I have a PXC (percona cluster. I guess mysql cluster with Galera?) running with just 1 one being bootstrapped (...
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103 views

MySQL error when trying to import tablespace

I'm following the steps described here, but the import of one of the tables is failing with the error below. It's a large table, with a ~22GB .idb file. [ERROR] [MY-012762] [InnoDB] Page offset doesn'...
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76 views

Innobackupex (Xtrabackup) 2.4.8 incremental backups take the same time as full backup

We have our operational as well as decision making databases both running on Percona MySQL 5.7.10. The OS is Ubuntu 16.04. On these various database instances we have been using Percona Innobackupex (...
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1answer
344 views

Transferring innodb table

I have a 30GB innoDB-only database that keeps having Lost connection to MySQL server during query when dumping when running mysqldump -u root -p --compress --max_allowed-packet=1G --net-buffer-...
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14 views

Upgrading Debian version of PXC production cluster

I have a 3 node PXC 5.7 cluster behind a ProxySQL instance. The cluster is still running on Debian 8. I have setup recently a testing PXC 5.7 cluster with a copy of the database on Debian 10 without ...
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1k views

MySQL: how to prevent deadlock on concurrent inserts

Percona Server 5.6.39-83.1-log Table structure: CREATE TABLE `myTable` ( `column_1` VARCHAR(50) NOT NULL DEFAULT '', `column_2` VARCHAR(50) NOT NULL DEFAULT '', `column_3` VARCHAR(50) ...
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94 views

Percona XtraDB Cluster (5.6.28-76.1-56-log) - random OOM events

We have a multi-node (each of 64G RAM) cluster. The main (the one we use for mutating data) node randomly just OOMs, this happens both in peak times and in extremely quiet times. What we've noticed ...
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1answer
79 views

Unusually low insert rate on MySQL Slaves

I have 4 MySQL nodes replicating like this: M1 - S1 | M2 - S2 Only the M1 master is writing, the hardware is similar (the slaves are a bit beefier), they all run Percona 5.7. The trouble is that ...
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1answer
71 views

right syntax to use near 'TOKUDB_DEFAULT'

mysql> CREATE TABLE stable1 ( column_a INT NOT NULL PRIMARY KEY, column_b INT NOT NULL) ENGINE=TokuDB, ROW_FORMAT=TOKUDB_DEFAULT; ERROR 1064 (42000): You have an error in your SQL syntax; check the ...
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23 views

MySQL oomkiller crashes after backup [duplicate]

I am using percona and the backups run successfully. However after the backup is done and sometimes during the backup MySQL is crashing and I am not certain where to start. Running show engine ...
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116 views

Need help in leveraging MySQL auditing

We are setting up password rotation policy to rotate account/password quarterly. We are also planning to use MySQL/Maria/Percona Auditing. Need to figure out the most efficient and feasible way to ...
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1answer
34 views

DB locks being created on temp tables. Can percona ignore temp tables for replication

I have a stored procedure that I am using that creates a temp table. Recently I've noticed the logs are filling up with locks. I think the temp table is trying to be replicated but I am unsure. *** ...
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515 views

RESET MASTER; does not reset GTID_EXECUTED

I'm trying to get replication up and running between two kubernetes pods, and am getting the dreaded @@GLOBAL.GTID_PURGED can only be set when @@GLOBAL.GTID_EXECUTED is empty. error. root@central-vm:~...
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1answer
41 views

Percona 5.7.24 : How to fix disk slave storage full

I find that my slave disk is full, but I don't understand what makes it full. Can anyone help me explain what this file is? And how it is formed, so that it makes lots of files that make storage full. ...
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1answer
63 views

Slow logs are not showing full details

I am new to mysql DB. I have set log_slow_verbosity value to full. root@localhost/(none)> SELECT @@global.log_slow_verbosity; +-----------------------------+ | @@global.log_slow_verbosity | +------...
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37 views

Percona: Analyze table doesn't work

I have a Percona 5.6.28 servers with a=some TokuDB tables. The biggest table has ~120 million rows. Statics keeps changeing in the past hald year: At first. Analyze table with recount model toke ...
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1answer
156 views

MySql Galera Multi site high availability

We have a datacenter with 3 percona glera nodes We have a store that wants to be in sync with our datacenter(multi master) our store's internet connection is not reliable ( may be down for 30 min), ...
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1answer
2k views

Error: ERROR 1047 (08S01) at line 6955: WSREP has not yet prepared node for application use

While restoring a dump from a CloudSQL instance into a node of a Percona xtradb cluster, I am getting this error. The line 6955 in the .sql dump file is in bold below: DROP TABLE IF EXISTS `...
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1answer
34 views

Percona/XtraDB Database with many of writes to a small table uses less CPU than the same database with less writes?

I'm trying to understand why Percona and xtradb InnoDB/MySQL behaves the way it does and if there's anything I can change in the configuration to fix it. I've a InnoDB database with only one table ...
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72 views

MySQL Percrona 8.0 became suddenly slow until restart mysql

My website today suddenly became slow and all requests were taking about 2 seconds to complete. Usually it takes like 0.2 second I checked available space on disk and I have a lot. Memory and CPU ...
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1answer
204 views

Percona Server 5.6.40 restarting with singal 11

We recently migrated our mysql to new hardware and it was running in slave mode for 15 days. We made it the master 11th June. On 13th June it restarted for the first time with signal 11. Stacktrace ...

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