Questions tagged [percona]

Percona : MySQL open source fork with performance improvements

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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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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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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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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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Percona PMM Dashboards in Vanilla Grafana Crash

I have a vanilla non-PMM flavoured Grafana + Prometheus setup. It seemed really silly to install a completely different appliance and setup to get Percona PMM Dashboards in my Grafana. So back in ...
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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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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
42 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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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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54 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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Xtrabackup Incremental Backups Failing After Enabling Change Page Tracking on MySQL 5.7

A week back I'd enabled the parameter innodb_track_changed_pages=ON on one of our Percona MySQL 5.7.10 database instances that we use as a Data Warehouse. The OS is Ubuntu 16.04. So far the ...
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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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How to “catchup” data after a backup

I need to transfer a database to another server with hopefully 0 downtime. I have Percona Mysql 8 on the destination and Mariadb on the source. I have successfully used Percona XtraBackup to create ...
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Does mcafee mysql audit plugin not work on Percona Server 5.7.27-30?

My environment is 5.7.27-30-log Percona Server on CentOS 7.4. When I installed this plugin (audit-plugin-percona-5.7-1.1.7-866), I got the following error messages. mysql> INSTALL PLUGIN AUDIT ...
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45 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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81 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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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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286 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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63 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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PMM QAN changing time-zone

How can I change the time-zone for the QAN page? The issue is that when I check the first-seen and last seen for any particular query, it shows in my local time (IST) + 5:30hrs. PFA screenshot, the ...
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31 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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122 views

Unable to add new node to Percona eXtraDB Cluster

I have a machine which was bootstrapped once for a Percona eXtraDB Cluster which is no longer available. See systemctl status mysql@bootstrap.service below: [root@RH7 ~]# systemctl status mysql@...
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51 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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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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102 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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22 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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208 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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28 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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50 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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31 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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92 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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1k 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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31 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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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
163 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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110 views

MySQL (Percona): Multiple simultaneous long-running connections

I'm running a distributed app in the cloud where clients keep open multiple long-running connections to a MySQL (Percona) server. After updating to the latest Percona release, the maximum number of ...
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1answer
369 views

MySQL replication slave using percona and docker

I am trying to run a MySQL replication slave in a docker container. We are running MySQL 5.7.24-27-log in production and it's from the percona repository (Ubuntu 18.04). I have used xtrabackup to ...
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61 views

Preserving some data on rollback in InnoDB?

I want to keep log of attempted, sucessful, and failed operations (both for troubleshooting, and also for detecting malicious users trying things). I want to keep that log in InnoDB MySQL table. Now, ...
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433 views

Is it possible to setup MySQL replication through ProxySQL?

We currently have replication working through haproxy so that if a node goes down replication continues with one of the other nodes. We're trying to completely replace haproxy with proxysql. Due to ...
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63 views

deadlock when transaction is waiting for itself

Sypnosis: percona-server 5.7.12, sometimes deadlocking Am I right interpreting this output in a way that transaction 2 is waiting on itself ? And, if yes - why ? ------------------------ LATEST ...
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Where and how to set the variables for Percona MySQL Audit Variables

I am trying to set the variable values for Percona MySQL Audit Plugin in my.cnf file before installing the audit plugin on MySQL Server like 'audit_log_rotate_on_size','audit_log_rotations' and '...
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2answers
573 views

Percona Xtradb cluster 56 node 2 rejoin cluster failed

I have following DB cluster: Node 1: Percona-XtraDB-Cluster-56-5.6.39-26.25.1 Node 2: Percona-XtraDB-Cluster-56-5.6.39-26.25.1 Node 3: Percona-XtraDB-Cluster-56-5.6.41-28.28.1 I start in order ...
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284 views

MySQL InnoDb crash when importing tablespace from remote machine

InnoDB crashes when importing ibd file from remote machine. Source version is MySQL-5.6.40, Destination version is MySQL-5.6.40. Database was backed up was backed Percona Xtrabackup with xbstream ...
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630 views

Using CONVERT TO CHARACTER SET for changing only collation?

I think the answer to this is an obvious yes, but I'm having trouble finding confirmation on it. All the questions related to charsets seems to be about changing the charset and not only collations. ...
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32 views

Proper way to fully backup and restore a database including indexes in a low-resource shared web host with ssh access?

I'm rather new to database management and I would like some advice on better practices by using the following experience as an example. Every time I update php software I do a quick export from ...
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1answer
176 views

Is it safe to use pt-online-schema-change in a multimaster environment?

I have 2 MySQL servers with row-based replication between them. Both of them are masters and slaves for each other (active-active master-master setup). If I understand it correctly pt-osc creates ...
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813 views

Is ProxySQL Suitable for Connection Pooling Apps?

I'm looking for some guidance on whether ProxySQL is suitable as a method of failing over Java connection pool based apps in a multi-master replication (with read/write split) set up? I've found ...
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1answer
46 views

Xtrabackup corrupt incremental backup

I have 3 nodes PXC 5.6 cluster. Xtrabackup 2.3.10. Centos 7.6 Percona-XtraDB-Cluster-56-5.6.41-28.28.1.el7.x86_64 I am using only single Node-1 for both read and write. And I use to take backup ...
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1answer
475 views

Percona PAM with AD authentication using SSSD

I have installed percona PAm plugin on my Percona server as shown below: mysql> show plugins; ... | auth_pam | ACTIVE | AUTHENTICATION | auth_pam.so | GPL | | ...
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292 views

Safe backup of PXC / Galera cluster

I have 3 nodes 'master master' cluster and using PXC 5.6 But I am only using a single node for both read and write. Before using pxc, i was using standalone Mariadb 5.5 and I was taking backup using ...

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