Questions tagged [percona]
Percona : MySQL open source fork with performance improvements
292
questions
0
votes
0answers
6 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@...
0
votes
1answer
21 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 ...
0
votes
0answers
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 ...
0
votes
1answer
83 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 ...
1
vote
1answer
14 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.
*** ...
0
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0answers
15 views
Problems importing innodb tablespaces
I am struggling with restoring a backup of a MySQL 5.5 database, which has been created with innobackupex --databases .... These are the steps to set up mysql and prepare the backup for restore:
# ...
1
vote
0answers
56 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:~...
1
vote
1answer
27 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.
...
0
votes
1answer
27 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 |
+------...
0
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0answers
25 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 ...
0
votes
1answer
47 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), ...
0
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0answers
531 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 `...
0
votes
1answer
29 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 ...
1
vote
0answers
37 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 ...
1
vote
1answer
101 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 ...
0
votes
2answers
66 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 ...
0
votes
1answer
201 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 ...
1
vote
0answers
45 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, ...
0
votes
1answer
239 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 ...
0
votes
0answers
38 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 ...
0
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0answers
76 views
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 '...
0
votes
2answers
344 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 ...
0
votes
0answers
179 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 ...
2
votes
2answers
263 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.
...
0
votes
0answers
30 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 ...
0
votes
1answer
110 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 ...
0
votes
0answers
444 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 ...
0
votes
1answer
31 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 ...
0
votes
1answer
278 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 |
| ...
0
votes
2answers
175 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 ...
0
votes
1answer
37 views
Convert MyISAM to InnoDB in PXC master master
I have 3 nodes PXC 5.6 master master cluster. I have few tables that are using MyISAM.
Total MyISAM table = 120
Total MyISAM table size = 80MB
I have also read few recommendations where it suggests ...
0
votes
1answer
22 views
Character set warning in PXC logs
I am using PXC 5.6 (Percona-XtraDB-Cluster-56-5.6.41-28.28.1.el7.x86_64) and my log file is flooded with this warning:
[Warning] Client failed to provide its character set. 'latin1' will be
used ...
-1
votes
1answer
119 views
Auto increment gap in percona xtradb cluster master master setup
I was using mariadb 5.5 before but now I have upgraded it and using percona xtradb cluster 5.6
I have 3 nodes cluster. I am only using single node for read and write.
I saw some increment gaps in ...
2
votes
0answers
116 views
Percona Xtradb Cluster not accepting options on command line
I am using Percona Xtradb Cluster 5.6 and trying to start my cluster through a donor node via command line and I am getting this error:
CentOS 7:
systemctl start mysql --wsrep-sst-donor=srv1
...
0
votes
1answer
52 views
Missing wsrep variables in mysql / percona / galera cluster
I set up a small mysql/percona/galera cluster using the percona cluster docker image, with 3 nodes.
I followed the documentation written here
After starting up the whole cluster, I'm missing some of ...
0
votes
1answer
379 views
InnoDB Buffer causing a lot of deadlocks and connection/client timeouts
I have a PXC cluster (5.7) with three nodes running on CentOS 7 VMs, each with the following system info:
mysql_db# free
total used free shared buff/cache ...
5
votes
1answer
297 views
MongoDB Migrating away from RocksDB to WiredTiger
We have been working for some time with RocksDB as our engine and we are now trying to migrate to WiredTiger. We have some pretty big databases around 4~12 TB of data and according to the process ...
1
vote
0answers
127 views
Percona 5.6.28-76.1: optimize config for database (Invision Power Board)
At the beginning I would like to explain that I'm not a DB expert. My hosting provider is struggling with DB optimization for my website. Unfortunately seems that they are out of ideas.
I would like ...
1
vote
1answer
306 views
MySQL PXC node failing to receive state
I have three nodes that I want to setup into a Percona XtraDB Cluster (PXC). I have bootstrapped the first node and joined the second node, but cannot somehow join the third node. All configuration is ...
1
vote
0answers
41 views
Database with lots of writes to a big table uses less CPU than the same database with less writes?
I'm trying to understand why InnoDB/MySQL behaves the way it does and if there's anything I can change in the configuration to fix it.
I have a table with nearly 5M rows, about 9GB in size. I also ...
0
votes
1answer
81 views
ProxySQL in PXC and failing all nodes
I'm going to install Percona XtraDB Cluster, and I have two questions about it:
1- Is it the last step? https://www.percona.com/doc/percona-xtradb-cluster/LATEST/verify.html
Or installing ProxySQL ...
0
votes
2answers
222 views
MySQL Solution to Sync 3 servers data
I have 3 servers which there is a load-balancer in front of them and sends the requests to these servers randomly.
The script is the same in all of these 3servers, but I need to sync the DB in all of ...
0
votes
1answer
168 views
Percona pt-table-sync Can't determine Master
We have following Multi master replication scenario. We are using MariaDB 10.1.34 and Percona 3.0.11
Master: Name: db-master1 (192.168.14.5)
Slave:
Name: db-slave2 (192.168.15.5) Replica Connection ...
0
votes
1answer
219 views
Percona pt-table-checksum output is in infinite loop “Waiting for the --replicate table to replicate”
We have following Multi master replication scenario. We are using Mariadb 10.1.34 and percona 3.0.11
Master: Name: db-master1 (192.168.14.5)
Slave: Name: db-slave2 (192.168.15.5) Replica ...
0
votes
1answer
249 views
Enable GTID on one node in Percona/Galera
Im having 3 node percona cluster. (5.6)
Server ID is enabled on each node but all are different IDs.
Binlog and log slave updates are enabled.
Now I want to enable GTID on the third node alone. I ...
1
vote
1answer
74 views
Does wsrep_cluster_address only accept the intranet IPs?
I was installing Percona XtraDB Cluster with 3 nodes.
Each node has a unique Internet IP address.
Following the docs Quick Start Guide for Percona XtraDB Cluster, I got the first node running but ...
0
votes
1answer
58 views
Point In Time recovery on Mysql
Can someone please advise best methods to do a mysql PITR from binary logs that are saved in MIXED format.
I am finding it difficult to identify the wrong queries that executed to avoid from restore ...
1
vote
1answer
61 views
Percona xtradb Backup for OLTP
I have installed MySQL 5.7 community edition installed.
Can we use Percona xtradb backup tool for backup DB for banking site databases for OLTP?
1
vote
1answer
521 views
what is MDL? (e.g. 'MDL semantics' or 'MDL locks') Probably Galera related
I found a guy talking about MDL semantics in a Galera/XtraDB bug report.
What is MDL? The term MDL also in Galera logs MDL conflict. Please explain in detail.
2018-06-14 17:07:10 140112699321088 [...
1
vote
0answers
325 views
DPKG error: uninstall percona xtradb server 5.7
Trying to uninstall percona, as I broke installation. No luck:
>$ sudo apt remove percona-xtradb-cluster-server-5.7
Reading package lists... Done
Building dependency tree
Reading state ...
