Percona : MySQL open source fork with performance improvements

learn more… | top users | synonyms

0
votes
0answers
4 views

MySQL/Percona Audit Log Plugin Not Working

I've been looking to implemement the Percona Audit Log plugin. So far I have installed it and configured it, and it seems to be working ok. Except, I have installed it on a slave Database as I don't ...
1
vote
2answers
27 views

Disaster recovery solution for MySQL

I have set a Master-master replication with the second Master running as read-only. This master-master setup is on the same location. Now I will have to setup an DR for this production at a different ...
2
votes
1answer
29 views

How to:: Master-Master replication

I have setup Master-Master replication on two servers. Now, my question is that if I need to have the second master as only read-only, what should I do? I tried doing mysql> flush tables with ...
0
votes
0answers
23 views

Doubt on Master-Master replication

I'm setting up a master-master replication where in the second master is only read only there by reducing the issues of conflicts. My doubt is that to reduce the downtime when my master goes down I ...
0
votes
0answers
31 views

MySQL drops every connection, even locally

Every time I run a MySQL query it has to reconnect mysql> show variables like '%timeout%'; ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... Connection id: 60 ...
4
votes
1answer
107 views

Column cannot be converted from type 'int' to type 'bigint(20) unsigned'?

I have a Percona MySQL cluster, with a master and a few slaves. Each of them is running "Ver 14.14 Distrib 5.5.40-36.1" of MySQL. Replication is row based. I ran an alter query on one of the tables ...
0
votes
0answers
9 views

Percona: Innobackupex failing when taking incremental backup

I have been trying to take incremental backup as below and its getting error all the time. Innobackupex 2.1.8 Linux x86_64 Mysql 5.5.45 Step1: innobackupex -uxxx --stream=xbstream datadir > ...
4
votes
1answer
11k views

Why default character_set_server is latin1?

I am using MySQL 5.5 and when I show variables about charset, I have +--------------------------+----------------------------+ | Variable_name | Value | ...
0
votes
0answers
26 views

One node in Percona Cluster isn't coming up with following error. kindly help

Whenever I try to start the services on this specific node it is failing with this error in log.Its is production system so Kindly help asap. [ERROR] WSREP: Node IP address not obtained from ...
0
votes
3answers
74 views

9 node percona xtradb cluster

We are looking to launch a 9 node percona xtradb cluster on Amazon where each ec2 node uses 20k iops disks. I was afraid if a 9 node cluster will work and mostly what I see is 3 node clusters. We ...
2
votes
1answer
37 views

Split brain scenario - RAC and PXC

Even though split brain scenario occurs in both Oracle RAC and Percona's XtraDB Cluster, a two node cluster is allowed and split brain scenario is resolved in RAC but a two node is not recommended in ...
1
vote
1answer
250 views

Innodb buffer pool indexes versus data usage

The server has 128GB of RAM. The innodb_buffer_pool_size is set to 106GB. mysql> show global variables like 'innodb_buffer_pool_size'; +-------------------------+--------------+ | Variable_name ...
3
votes
2answers
615 views

Percona Toolkit Installation Error

[root@localhost ~]# rpm -ivh percona-toolkit-2.2.7-1.noarch.rpm error: Failed dependencies: perl(DBD::mysql) >= 1.0 is needed by percona-toolkit-2.2.7-1.noarch perl(Time::HiRes) is needed ...
0
votes
1answer
294 views

Mariadb Galera Cluster using Xtradb backup is not working

I am trying out the first test of MariaDB Galera cluster setup without success. This is the error in the log innobackupex: Created backup directory /tmp tar: -: Cannot write: Broken pipe tar: Error ...
0
votes
2answers
34 views

What is happening when Seconds_Behind_Master oscillates between two very different sets ov values?

I have a Percona 5.6 slave, newly set up, that is replicating from a server that is itself a slave to a third. The middle server (dbS2, the master for dbS3) is currently ~260000 seconds behind the ...
1
vote
1answer
23 views

Innobackupex: How to extract individual files from xbstream compressed backups

We are scripting a mix of full and incremental backup setup for our prodcut backend with sunday triggering full backup and incremental backup on all the remaining days. In this process, we should be ...
0
votes
1answer
463 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) ...
2
votes
1answer
229 views

innobackupex is failing while exporting backup

I am using perl script which is working fine in one of my other box which used to take individual schema backups & finally take all schema together using percona innobackupex. I have following ...
0
votes
1answer
291 views

pt-table-checksum - Verify MySQL replication integrity

export/import: $ mysqldump -h6dhdbm01 -p clee2 users > 6dhdbm01-clee2.users.sql Enter password: $ echo $? 0 $ mysql clee2 < 6dhdbm01-clee2.users.sql $ echo $? 0 $ pt-table-checksum: $ ...
0
votes
0answers
12 views

MySQL Cluster and Async replication

My requirement is to have percona cluster for high availability and have the MySQL's classical aysnc replication for disaster recovery purpose. Is this is feasible? What are the possible issues that I ...
3
votes
1answer
70 views

Active-active Cluster In MySQL

I'm planning to go for a 3-node active-active MySQL cluster which will not have more 100 databases. Many experts here have already told there are issues with MySQL 5.6 and 5.7 where circular ...
0
votes
0answers
28 views

Galera Cluster backup and point in time recovery

Currently we have a 3 node Percona Galera Cluster, and all our writes go to node 1 and we run binary logs on this node also. We run xtrabackup backups on node1 every morning and move these off site ...
0
votes
0answers
12 views

HAProxy node sequencing

Is there a way to configure HAProxy to stop sending queries to one of the nodes in a percona xtradb cluster if that node is running a very slow query i.e, bypassing the node processing the extremely ...
0
votes
0answers
495 views

Low Query cache efficiency after mariadb 5.5 migration

We change from Percona MySQL server 5.5 to MariaDB but performance is not as good as we think. This graph is from a day in MariaDB. You can see the low performance in terms of cache_hits: We have ...
0
votes
0answers
22 views

Innobackupex restore steps from 1 incremental and multiple incremental steps

My current backup plan is: Full -> Incremental1 based on full -> incremental2 based on incremental1 -> incremental3 based on incremental2... Please validate if this steps is correct during emergency ...
1
vote
1answer
29 views

MySQL: Incorrect binary log format - OFF.000

I have a Percona MySQL 5.5.30 as a master(Debian 6.0.7). I got a weird issue that all my binary logs started saving in format OFF.00* instead of the specified format in .cnf file. mysql> show ...
1
vote
1answer
45 views

Innobackupex apply-log should be done before emergency restore or after each backup?

Basically Percona Innobackupex consist with three steps: 1. Backup 2. Apply log 3. Copy back restore during emergency My question: When should I do apply log? Is it after each backup or before ...
0
votes
1answer
31 views

pt-table-checksum toolkit for few databases from file

I've got a question. I'm doing a simple script right now and it isn't working like I want. #!/bin/bash cat /etc/backup.conf | egrep -v "(^#.*|^$|^--.*)" > /tmp/databases while read ...
0
votes
1answer
53 views

Cannot overwrite file: /var/lib/mysql/ibdata1 when using Percona xtrabackup

I am receiving an error when I am trying to restore from a percona backup to my local mysql server. Cannot overwrite file: /var/lib/mysql/ibdata1 at /usr/bin/innobackupex line 2128. sudo ...
0
votes
0answers
22 views

MySQL Cluster - Adding more storage space

I have spent a few days looking into different MySQL Cluster options, such as Percona and MariaDB Galera, however from what I understand neither of them can do what I would like it to do. What I am ...
0
votes
0answers
61 views

How to troubleshoot, find and fix query Percona 5.6 with error “SQLSTATE[HY000]: General error: 1785 When @@GLOBAL.ENFORCE_GTID_CONSISTENCY = 1”

i'm running Magento CMS, and underneath there are 2 physical servers both with Percona Server version: 5.6.23-72.1-log Percona Server (GPL), Release 72.1, Revision 0503478 in Master/Slave ...
2
votes
1answer
213 views

How mysql (innodb) handles auto increment column

I am working on a OLTP environment with multiple parallel write operation. I found this in documentation about auto increment locking but still i am interested to know much about it in details. Can ...
1
vote
1answer
322 views

Consolidated realtime mysql backup with master/slave setup or binlog

I have 20+ mysql servers and their have low write requirements. So, I want to see if any way I can replicate the data/binlog from these servers to a single slave so realtime backup purpose. If I ...
1
vote
0answers
57 views

pt-archiver and foreign keys?

How does pt-archiver handle foreign keys? Does it archive associated data? (seems not but the documentation is not very clear to me) And if not, how could one perform an archive of a table with all ...
0
votes
1answer
42 views

How to determine if an Index is uselss in Percona MySQL?

Using Percona Server 5.5 I've a table which stores user activty (lets call it user_activity). It was created quite a few years ago when I had only a little bit of knowledge about database ...
0
votes
1answer
100 views

set session wait_timeout inside of phpmyadmin for export/import

I need to increase wait_timeout variable in mysql only when access mysql from phpmyadmin. I don't want to edit my.cnf file or set it globaly in mysql server. I've read documentation, but haven't ...
1
vote
1answer
82 views

percona cluster 5.6 - handshake with remote endpoint failed, but endpoint is not part of config

I set up a cluster of 3 database nodes using a percona 5.6 cluster. Everything works, all nodes are replicated. I configured SSL for state transfer. The cluster recently changed its topography, ...
1
vote
1answer
67 views

Percona MySQL 5.6 databases ignoring key length at constrait creation

We have a 3 servers running Percona MySQL 5.6 in a Master/Master configuration that are all reporting errors on key length, either too long or not specified. The structure of the databases is all ...
0
votes
1answer
39 views

Mysql Multiple data files rollover size

we want to setup the mysql ibdata files in such a way that after every 100M , new data is added to another file specified in innodb_data_file_path i.e. ...
2
votes
1answer
78 views

Will large inserts crash a 3-node MySQL database cluster?

We have a 3 node MySQL database cluster than runs on Percona. I have a stored procedure that inserts a lot of rows in one hit, potentially over a million rows. I've been warned (by our DBA) this ...
2
votes
1answer
420 views

Mysql Cluster vs Percona/Maridb Cluster [closed]

We want to setup a mysql cluster with master-master sync replication, to provide HA so that one db for write from one app, other for write from other app. It is a webapp with high write and medium ...
0
votes
0answers
69 views

InnoDB Recovery failed after Percona5.6 crash

The Server has crashed and now there is a problem when starting Percona5.6: 2015-03-19 17:26:45 2060 [Note] InnoDB: The log sequence numbers 365752853 and 365752853 in ibdata files do not match the ...
1
vote
1answer
1k views

Difference between FIND_IN_SET and LIKE

is there a difference in behavior or performance in choosing FIND_IN_SET over LIKE for a operation that looks like: SELECT * FROM my_table WHERE column_1 LIKE %string% vs SELECT * FROM my_table ...
0
votes
0answers
42 views

Percona XtraDB Cluster: Node going in hang stage again and again

I am getting below error again and again on Percona XtraDB Cluster nodes and after this my MySQL service is going in hang state. 2015-03-16 08:39:05 13254 [ERROR] WSREP: Unsupported key prefix: ^B: ...
2
votes
2answers
550 views

Upgrading to MySQL 5.6, benefits to switching to GTID replication?

We have the most basic of MySQL replication setups, a single Master doing statement-based replication to a single Slave, a 90/10 mix of innodb/myisam tables. Both run Percona MySQL 5.5 at the moment ...
0
votes
1answer
79 views

Does Percona Xtrabackup support RedHat release 4

I downloaded Percona's Xtrabackup rpm file for RedHAT. I attempted to install but hit into an error. The error seems to point to missing dependencies and libraries. I have no issue with RedHat 6 OS. I ...
1
vote
1answer
240 views

MySQL 5.5 Replication to Galera/Percona XtraDB Cluster

We are currently investigating moving our current MySQL 5.5 Master > 5 x Slaves (with Statement Based Replication, apx 250GB data and growing) to a HA clustering option. Mainly to provide greater ...
1
vote
1answer
814 views

MySQL slave taking too long on “Queueing master event to the relay log”

I have two mysql mysql slave servers. The DB version is: mysql> show variables like '%version%'; +-------------------------+-----------------------------------------------------+ | Variable_name ...
3
votes
1answer
7k views

MySQL requires FORCE INDEX on huge table and simple SELECTs

We have an application which stores articles from different sources in a MySQL table and allows users to retrieve those articles ordered by date. Articles are always filtered by source, so for client ...
0
votes
1answer
72 views

Mysql master master with high latency

We have a single master setup with many slaves in germany and some slaves in australia. To have faster writes in australia we want a master-master setup between germany and australia. Read slaves ...