Questions tagged [percona-server]

Percona Server is a fork of MySQL Community Edition, focusing on performance improvements.

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MySQL Monitoring Tools

I want to deploy tools to monitor my Production Percona servers (5.6 on Linux). I never used Nagios or any tool before. I did go through this great link but I wanted to clarify few things before ...
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SSL for security - Percona MySQL

I have been told to implement SSL in my Master-Master MySQL instances by my security team to have secure traffic only to be received at the database end. I have never implemented SSL in a database ...
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Mysqldump failing while restoring database - MySQL 5.6

I have dumped one of my databases of size 5-6GB. I'm trying to restore to another instance but the same is getting failed after sometime with the following error: ERROR 2013 (HY000) at line 12006: ...
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MYSQL Extremely slow - Heavy CPU Load

I am having an issue with my Percona MySQL 5.7 node. Since past 3 days, MySQL is processing queries very slowly. When I run top, the % CPU usage of MySQL is always 600. # top | grep mysqld 8409 ...
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MySQL - Upgrading from 5.5 to 5.6

I have MySQL community version 5.5.50 running in linux having 4-5 databases on it. Requirement is to upgrade to Percona Server 5.6.31-77.0. What are the pre-requisites that I need to check before ...
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Doubts on Setting up Master-Master replication (Percona)

I have two 5.6 Percona servers in which I'm planning to setup Active master- Passive master replication. Secondary master will be in read-only mode. Caveat is that the servers in which i'm going to ...
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Percona server Master-Slave version query

I have a master with percona server (5.6.25) running in RHEL host and a slave of the same version. I'm facing some corruption issues in replication slave and I'm thinking of rebuilding the slave from ...
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6k views

MySQL - Persistent values in my.cnf

I have a small doubt regarding making variables persistent in Percona Server 5.6 in Linux. I need to make log-bin-trust-function-creators persistent so that I need not make it to true everytime on ...
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20 mysqld processes using only 1 port?

These are from Aliyun Cloud DB Servers,20 mysqld processes using one 3306 port Has anyone seen this before ? Can anybody explain how to do that ? Are there any advantages to this ?
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1answer
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How to clear gcache pages in Percona PXC

I have a 4 node cluster(percona PXC) and one of the nodes have more than 150 gcache disk files each of size ~128 MB. I would like to purge or flush them so that the server user fresh gcache disk file. ...
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1answer
212 views

TokuDB table stats row count decreases to 1

I have a few Percona 5.6.30 servers with a TokuDB table that has ~120 million rows. On some of these servers, row count in SHOW TABLE STATUS mysteriously decreases until is hits 1. This is accompanied ...
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216 views

Replicating into a Percona XtraDB Cluster

We have a 2 node (plus an arbiter) Percona XtraDB cluster. It is used for data indexing/archiving. It has it's own database called archive but it is also the replication slave for a database called ...
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2k views

How can I disable xb_doublewrite?

Getting error while service restart. [ERROR] InnoDB: A parallel doublewrite file /test/mysql/xb_doublewrite found on startup.
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MySQL Upgrade query

I have 5.5.44-log MySQL Community Server (GPL) running in one of my RHEL 6.4 server. I need to upgrade the server to Percona Server-5.6.29-76.2. How to go about the upgrade? Should I completely remove ...
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2answers
1k views

Percona 5.7 tokudb poor query performance - wrong (non-clustered) index chosen

I have a table with about 8.5m rows in it. The table is tokudb and it has the indexes described below. I'm experiencing dismal performance when trying to run update statements like the following: ...
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1answer
801 views

InnoDB AUTO_INCREMENT resetting itself without MySQL restart [duplicate]

We've recently noticed the following scenario happening in many of our databases: A record is inserted, and receives an AUTO_INCREMENT primary key. The record is deleted. Another record is inserted, ...
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500 views

Tokudb HotBackup

I was trying to evaluate the latest tokudb Hotbackup for percona's tokudb engine. This install is under debian (Ubuntu 14) I was able to get all the packages installed with out error and get all the ...
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Mysql (percona-server 5.5) completely stalls during import (myloader)

While configuring our new servers (IBM X3650M4, 2x Intel Xeon E5-2620, 64G RAM, RAID 10 (4x 240G SSD)) we bumped into a strange problem. We're trying to import dumps (mydumper) from our (old) ...
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630 views

MySQL percona 5.6 to MySQL 5.5 replication

Scenario 1 I am having a MySQL DB on 5.5 which is compliance, So need to upgrade it to MySQL 5.6. while doing this we see that 5.6 is running slow, were as it runs perfectly on 5.5 backup. Scenario ...
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Percona mysqld got signal 11

I've googled and searched stackexchange, but can't find anything relevant to this particular issue (there are other error 11 issues, just not for this as far as I can tell). We have a server that is ...
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2answers
3k views

Percona xtradb cluster node2 won't start

I have configured Percona Xtradb cluster 5.6. The first node starts fine when bootstrapped, but the second node seems to have an issue with this variable setting: wsrep_provider=/usr/lib/...
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Temporary tables and Fetch times

We've noticed something curious in our office which no one seems to know the answer to. I'll explain: We have some mildly complex queries, one of which executes in under 3 seconds and then has a ...
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troubleshoot high value for mysql innodb pages written per second

Our database is writting about 600 pages a second to its innodb buffer pools. Usually this value is about 10 pages/sec, so the server is experiencing a very high IO utilization, around 50%. Is there ...
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580 views

Percona and MariaDB-10.0 ignoring not null on table fields

On the percona-5.6 and MariaDB-10.0 servers, the NOT NULL declared on table field are being ignored. I am able to leave fields declared as NOT NULL empty when inserting data and the servers are not ...
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Very slow IO on mysql percona server

Our site goes down because the IO on our database servers is too slow. Troubleshooting this we found that mysql is really really slow. It's constantly reading from disk and I think not using enough ...
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819 views

MySQL/Percona Server is taking long and I'd prefer to skip all this waiting even if it means data loss

Originally posted to https://www.facebook.com/groups/GNUAndLinux/permalink/10155020539805019/ but no replies received. I run Percona Server 5.6.21-70.0-688 x64 on Ubuntu Server 12.04 LTS x64, 64GB ...
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1answer
1k views

What is the Best way to set Disaster recovery setup for percona Xtra DB Cluster?

We do have a Percona XtraDB Cluster(Master-Master-Master) setup in one country. Now we want to setup a disaster recovery setup in some other country. Please provide us the best possible ways to do ...
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3answers
888 views

Integrity constraint violation in Percona XtraDB Cluster

We have a PHP application that uses AWS Load Balancer that connects to 3 Percona Servers. Before we used a single standard Percona Server and that never happened. The cluster starts throwing Primary ...
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1answer
112 views

Super slow (day long) count(*) after upgrade to 5.6

After upgrading to Percona 5.6.20 from 5.5.34 I noticed counts on larger tables take a massively long time to execute. The table is about 27G and 300M rows. It is not compressed and was innodb ...
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Moved database (percona mysql) to larger disk, now everything is missing (though the files exist)

I dont know anything about databases or MySQL beyond the absolute basics so lets start with that. I moved the /var/lib/mysql from the / to a mounted volume which I remounted as /var/lib/mysql after ...
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2answers
6k views

Identifying cause of high I/O

I'm trying to diagnose the bottleneck for high-write I/O activity on a percona master (with replication to a slave). The pattern of behaviour is roughly cyclic and regular: 60 mins of 75-90% write-...
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Automatic slave reconfiguration after updating master

I have development mysql master and slave servers and a prod server. I need to set up regular (once a week) syncronization of dev and prod databases. It would be easy for me to use prod# mysqldump > ...
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1answer
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Is it mandatory to enable --log_slave_updates with MySQL Replication using GTID? [duplicate]

I'm setting up 5.6 Percona Mysql, in order to enable GTID should I have to enable log_slave_update on both Master and Slave ? If I should enable log_slave_update, then I'm counting this to CONS for ...
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2answers
497 views

MySQL excessive tmp disk tables after Upgrade to 5.6

After upgrading two MySQL-Servers which run Master-Slave replication from Percona MySQL 5.5 to Percona MySQL 5.6 an excessive amount of temporary Tables gets created on the slave. The Master seems to ...
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1answer
7k views

Error 1236 From Master After Restored Replication

I've been trying to restore a broken replication caused by power interruption. upon checking the slaveDB, it was already broken so I setup a new replication. And upon supposedly completing the ...
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2answers
2k views

Is it necessary to run apply-log immediately after innobackupexec has run?

i have been trying to read other questions, but i did not find a answer to suit me. So excuse me if i ask something that has been already asked. I'm trying to organize my self and backup all my mysql ...
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1answer
3k views

slow writes on percona / mariadb server only when replication is running

Hi I am trying to migrate to percona server from mysql 5.6 on windows. In my development machine for percona is running of centos 6.5 which is installed on vmware 5.5 sphere. Our business ...
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354 views

Seg faults in Percona Server 5.6.19

Trying to figure out what went wrong here. Any advice would be appreciated. This server is running a new installation of Percona Server 5.6.19 on CentOS 6.5 16:05:46 UTC - mysqld got signal 11 ; This ...
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1answer
1k views

Optimize Percona MySQL InnoDB 3.2TB database

(Before you will call me an idiot or start laughing, please remember it's a real deal on my side and I cannot cancel this assignment as it is a part of a bigger project) I have a database server that ...
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1answer
1k views

Cannot execute statement: impossible to write to binary log?

When I try to create a user story/issue in my my percona xtradb cluster I am getting below error. How to fix it? Error creating issue: Could not create workflow instance: root cause: while inserting:...
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2answers
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Baffled with MySQL LEFT JOIN query that I have to speed it up

I am kind of a puzzled with this query trying to optimize it but no way I am able to (due to my limited knowledge as a DBA). So, I asked the experts. In my setup I have three (primary) tables. ...
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1answer
868 views

Is the innodb_lazy_drop_table problem solved?

I'm researching database configuration for MySQL/MariaDB. I've been reading the configuration chapter in "High Performance MySQL". In there, it suggests that innodb_lazy_drop_table can be used to ...
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1answer
1k views

Online Schema migration in MySQL : When to start?

I'm the tech lead of a Social Media SAAS, where we're currently experiencing a big increase in data amount we're storing in our mySQL-database. We're having a single MySQL db, and besides many ...
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673 views

Trouble installing percona 5.6 on Google compute engine debian

I've been trying to install percona server on a fresh Google compute engine instance. I haven't installed mysql server previously. I followed the instructions from here. I get this when I use: apt-...
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1answer
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MySQL: mysqld_safe options

Is there a way to specify these options in configuration file? I've tried to add them into [mysqld_safe] section but it doesn't work: [mysqld_safe] numa-interleave = 1 flush-caches = 1 - # ps -ww -...
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1answer
354 views

MySQL Replication not proceeding

I have a weird replication problem I have not seen before. It's basic mysql replication with single master and two slaves. One of the slaves is not executing replication events and seems just stuck ...
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1answer
839 views

Strange Locking issues while playing back logs via percona playback

Problem while replaying logs I am in the process of benchmarking a new DB node (specs at the end) and have run across some strange behavior: As described here i: Created a dump (innobackupex ftw) I ...
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2answers
2k views

any documentation on tpcc-mysql benchmark tool

Where can I find tpcc-mysql documentation? I google it but I can't find any documentation about it.
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1answer
2k views

Unknown storage engine 'XtraDB'

I installed Percona Server 5.6.12-rc60.4, when I want create table such as : CREATE TABLE IF NOT EXISTS `mydb`.`table` ( `id` INT NOT NULL AUTO_INCREMENT , `title` VARCHAR( 64 ) NOT NULL , PRIMARY ...
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1answer
723 views

How big can innodb_doublewrite_file grow?

When I use the enable innodb_doublewrite_file ... How big can this file grow ? How can I calculate the optimal disk size, if it would be used only for this file?