Questions tagged [percona-server]
Percona Server is a fork of MySQL Community Edition, focusing on performance improvements.
125
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mysqld got signal 6 - MySQL server crashes every 2-3 minutes
MySQL server crashes every 2-3 minutes due to the issue below, how do I understand where exactly does the error occur and how to stop this from occurring? Any help with how to properly read this to ...
- 101
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2
answers
285
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failed pt-online-schema-change left behind triggers. How to delete?
We had a failed pt-osc - the server ran out of disk space. And now the triggers are left behind
SHOW TRIGGERS;
pt_osc_xxx_production_orders_ins
pt_osc_xxx_production_orders_upd
...
- 153
1
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0
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29
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MySQL8 database painfully slow after failed pt-osc
In another question we attempted to update a table in our MySQL8 db. That didn't work out, but since then our database (even after both DB and machine restarts) seems painfully slow at the strangest ...
- 153
1
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1
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142
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MySQL upgrade 5.7 to 8.0 with Keyring encrytption failed to complete upgrade
I ran the mysql community installer on Red Hat 7.9 over a 5.7.36 installation.
First, I ran xtrabackup for all dbs
Then I stopped mysqld
Then I ran yum install
Everything ended ok
I got the below ...
- 506
1
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1
answer
71
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Percona for mysql 8.0.31 unresponsive every day at exact same time?
So… we’re hitting a weird case the last week.
Our percona 8.0.31 server on ubuntu 22.04 (128G RAM) becomes unresponsive every day at the same time.
The symptoms are a bit weird too. Our usual ...
- 21
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1
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61
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Percona 8 MySQL server restart while restoring backup
I have a problem with Percona 8 on Debian 11, I installed the latest version of Percona 8 for MySQL server, 8.0.29-21
I set these configurations in the mysqld.cnf
innodb_buffer_pool_size = 12G
...
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0
answers
20
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Error installing xtradb percona cluster
I have 2 nodes to join percona cluster . I installed them successfully , node 1 was able to start working . when I switched to node 2 configuration, I fixed the file my.cnf
cat >>/etc/my.cnf<&...
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2
answers
1k
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Syntax Error when Creating a Temporary Table Using A Subquery That Contains A Union All
So what I'm trying to do is create a temporary table with a unioned set of results that have distinct conditions. The information is largely the same, just in different places that need to be matched.
...
- 23
1
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1
answer
345
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Remove node from percona xtradb cluster
I have a 5 node cluster. When I run backups it locks the entire cluster. I use DDL statements in a stored procedure that is used heavily. What I am trying to achieve is taking one node out of the ...
- 133
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1
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148
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mysqlbinlog not showing 'pseudo-SQL' comments for BINLOG statements
We are running Percona mysql server 5.7.36-39.1 and corresponding version of mysqlbinlog.
I'm running mysqlbinlog against a binlog file and position (taken from the output of show master status;) with ...
- 341
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1
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2k
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Force kill long running index creation
I have a 192GB table that I started adding an index to over night.
This was still going several hours later.
At the time the alter table started the database was very quiet.
There were other queries ...
- 273
1
vote
1
answer
377
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replicate-wild-do-table=channel_name:db_name.% doesn't work in MySQL 8.0 for channel based replication
I am trying to configure a replication topology where there will be one slave which will connect to two masters. Percona Server 8.0.25.
Master1- main master
bkp_server - slave to master1 and ...
1
vote
1
answer
155
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Is it possible to join MySQL 8.0 to a cluster of MySQL 5.7
I have a MySQL 5.7 (5.7.19-17-57-log Percona XtraDB Cluster) cluster using Galera, but I am in the middle of upgrading to 8.0 -- 8.0.23-14 Percona Server (GPL), Release '14'. I wasn't sure if it was ...
- 113
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1
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227
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How to restore percona database from kubernetes?
I got the backup works by setting these on the helm chart values (it works according to the documentation):
google-cloud-storage-s3:
type: s3
s3:
bucket: gcp_bucket
...
- 1,363
0
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2
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18
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How can I select data size group by id for every value in a table
I hope I can explain exactly what I need to get.
I have a Table that has a specific column of type MEDIUMBLOB.
What I need to do is to determine the size of every value inserted on this column grouped ...
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1
answer
155
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How to properly replicate and archive at once
I have a 300GB database that is growing around 5GB a day. It stores time-based data, and as such, I currently have around 60 days of data. My main database server has a 450 GB NVMe, so I want to get a ...
- 163
2
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1
answer
2k
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Missing mysql, sys, performance_schema
I have Percona Mysql 8.0.19-10 on debian 10.
A year ago I had some issues restoring a backup that required me to mess with tablespaces. I forget what all I had done but eventually I got the database ...
- 163
-1
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1
answer
305
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MYSQL optimization for Magento 2
Im running my magento 2 project on 5 core 10gb ram VM.
I did some benchmarks and i see that my DB queries take quite some time to execute. Traffic on this site is almost zero. Mysql is running on 5.7....
- 1
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1
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69
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Percona xtradb cluster 5.7 solution on AWS and on premise. Not all nodes are connected to
We have 3 nodes cluster. 2 in virginia and 1 in ohio. The cluster is working fine we do not have any issues. But nothing pop out when we started doing extensive monitoring using datadog. It shows that ...
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0
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204
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2020-07-29T07:44:29.817503Z 108716 [Note] Aborted connection 108716 to db:
We are getting continuously logs in mysql error logs
2020-07-29T07:46:56.534666Z 111536 [Note] Aborted connection 111536 to db: '' user: '' host: '' (Got an error reading communication packets)
we ...
- 23
2
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2
answers
170
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Percona XtraDB Cluster - do I add arbiter IP in gcomm://?
I'm configuring Percona XtraDB Cluster 8 on two nodes, and use a 3rd node to act as an arbiter.
I cannot make up out of the docs whether to add the IP of the arbiter in the galera nodes addresses of ...
- 113
1
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1
answer
310
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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 (...
- 31
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0
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209
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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'...
- 23
1
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1
answer
449
views
Why are there empty transactions in the MySQL binlog?
I am using Percona Server for MySQL 8.0.x. I have setup replication between two instances with GTID mode turned OFF. Almost all UPDATE and INSERTS are wrapped in the transaction from the application ...
- 131
1
vote
1
answer
1k
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Percona Server - binlog not automatically purge with mysqladmin flush-logs
I have a little problem and I need your help please. Here is the story : I have Percona Server in version 8.0.13 with one slave and the old binlogs on master are not deleted automatically when flush-...
- 11
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2
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83
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MySQL version appears to be inconsistent?
I have recently upgraded mysqld (percona server) from 5.5.60-38.12 to 5.5.62-38.14. This is on Debian, and the upgrade was done like this:
# apt-get update
# apt-get upgrade
I am surprised to find ...
- 231
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1
answer
150
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Intentionally slow down importing of (Percona) MySQL 5.7 dump
I need to move a very large MySQL table (250M rows, 120 columns. 120GB of data, 310GB of index) from one database instance to another (on AWS). For reasons beyond the scope of this question, this is ...
- 101
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1
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114
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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.
...
- 113
1
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2
answers
1k
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MySQL swaps on system with more than enough RAM
Om my new dual AMD EPYC 7401 24-Core (128G RAM) MySQL starts swapping even after a restart with no data in memory.
NUMA
# numactl --hardware
available: 8 nodes (0-7)
node 0 cpus: 0 1 2 3 4 5 48 49 ...
- 193
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1
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286
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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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2
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293
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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 ...
- 121
2
votes
1
answer
1k
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innodb buffer pool size not changing
I have Percona fork of MySQL 5.7 installed where I have defined innodb_buffer_pool_size in /etc/percona-server.conf.d/mysqld.cnf as follows
innodb_buffer_pool_size = 10G
But, when I login to MySQL ...
- 121
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0
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48
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Help with high load MySQL configuraiton
Server:
Disk: 2X 500 SSD RAID 1, 3 TB HDD RAM: 256 GB DDR4 CPU: Intel Xeon
10 core
Database:
Percona for MySQL 5.7.23
Average number of active connections:
1700
I have 4 schemas, and ...
- 1
1
vote
1
answer
198
views
Percona Audit Log plugin not auditing account
I have setup the Percona-server-5.6.41-89 Audit plugin with the following settings:
audit_log_policy=QUERIES
audit_log_handler=FILE
audit_log_file=/var/log/mysql/perc_audit.txt
audit_log_format=CSV
...
- 113
3
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1
answer
2k
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mysql_upgrade check if it's neccessary to run it
How can I determine, do I need to run 'mysql_upgrade` command on database?
Percona-server-5.6.41 is installed and running now for a several monthes. Before it mysql-5.6 was installed. In-place ...
- 113
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1
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451
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Percona-server-5.6.41 and sql_mode [duplicate]
When setting
sql_mode=""
in /etc/mysql/my.cnf server leaves this variable in it default value:
mysql> show variables like 'sql_mode';
+-------------------+--------------------------------------...
- 113
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0
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54
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MySQL performance_schema NULL users
I was running performance_schema query to check for users performing DDL on our databases, and found a NULL user, which however does not exists when i check the mysql database for users using the ...
- 333
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0
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36
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MySQL server-id reset in CentOS
I am running MySQL 5.7 (Percona) on CentOS 7.5.x, and when I set the serser-id the config file, MySQL is somehow changing the server-id value to '4294967295'. This is happening on all my PXC nodes. On ...
- 333
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1
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130
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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 ...
- 11
1
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1
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211
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MySQL optimization for mapping service -- getting MySQL to use more memory?
Time to upgrade hardware? ... I'm not sure if there is much more I can do, spent a few days tweaking/googling -- before taking the upgrade plunge I thought I'd check here... to see if the well ...
- 11
1
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1
answer
541
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how to setup percona pmm monitoring of percona 5.7 in docker container
I want to monitor percona running in docker with the percona monitoring and management client.
I have percona monitoring and management installed, running and monitoring other percona instances (...
- 111
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0
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190
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TokuDB table stats row count decreases very fast while adding/updateing data
We run an Percona server with the newest version(5.7.19-17).
After a while the cardinality of multiple tables drop to zero.
A new created index also have an cardinality of 0 if the existing are zero.
...
- 11
1
vote
1
answer
323
views
MySQL 5.7 log rotate empty
We upgraded our Percona XtraDB servers from version 5.6 to 5.7, and we noticed that the rotation slow query log files created after the initial file are empty. Is this something known in 5.7? How can ...
- 333
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1
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329
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Is it possible to log MySQL variable changes?
I'm using Percona MySQL server 5.7 and after a while my max_allowed_packet change to 1024 bytes and I don't know who or what application changes it.
I've set it in config file and after restart it ...
- 101
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1
answer
2k
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wsrep_sst_auth user permissions
In the my.cnf for our PXC cluster nodes, we have been using root user for wsrep_sst_auth with all the admin privileges that comes with the root account. We know using the root user:password inside the ...
- 333
7
votes
2
answers
31k
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What should I set my table_definition_cache to?
I just discovered table_definition_cache and I am trying to decide what to set it to. I am messing with my config because of performance issues.
On one server I have 36599 tables and when I run SHOW ...
- 259
2
votes
1
answer
5k
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MySQL takes a long time to start
I'm trying to understand why mysql would take 20mn to start.
I'm running 5.7.17-13-log, and I have a large ibdata1 file (20GB) even with file per table activated. Here is it's content:
# innochecksum ...
- 171
6
votes
2
answers
5k
views
MySQL stuck on "wsrep: initiating replication for write set (-1)"
I ran into a situation with MySQL recently which I hadn't seen before. We have a Percona cluster with 3 nodes. The master stopped processing queries and the PHP FPM web application we host became ...
- 528
0
votes
1
answer
426
views
Tokudb buggy and plugin gone missing causing mysql to stop starting?
I have actually installed percona mysql and trying to move from oracle mysql. I have been using innodb for quite some time. I heard and read a lot of about tokudb being able to support large db etc. ...
- 227
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1
answer
546
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Unable to start mysql slave due to the error: Unknown table engine 'InnoDB'
I had to install my mysql slave server due to storage issue. I have synced my master disk to the slave disk. Now i'm not able to start my slave server (4GB RAM) due to the error:
Unknown table engine ...
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