Questions tagged [percona]
Percona : MySQL open source fork with performance improvements
287
questions
0
votes
1answer
17 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
votes
0answers
14 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
26 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
votes
0answers
50 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
24 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
20 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
39 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
40 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
53 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
30 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
80 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
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0answers
25 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
48 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
122 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
74 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 ...
1
vote
2answers
69 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
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0answers
20 views
Learning Percona Monitoring - CPU Usage
I've just started using the Percona Monitoring. I am not necessarily a db admin but I ended up with the task. I am enjoying it but truth be told I am not sure what I am looking at. There is an ...
0
votes
0answers
12 views
do tmpdir is cleaned up automatically
While testing a 3 node percona cluster we often get:
Errcode: 28 - No space left on device
After login to the servers and checking the defined tmpdir I notice that is empty and clients can connect ...
0
votes
0answers
27 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
61 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
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0answers
234 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
25 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
142 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
95 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
28 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
19 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 ...
0
votes
1answer
64 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
76 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
36 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
241 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
229 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 ...
0
votes
0answers
44 views
mysql got connection timeout vs error tineout
I have Percona XtraDB Cluster with 3 nodes, and noticed a lot of the following timeout messages in my MySQL error log:
2018-11-13T08:34:13.724411-00:00 411826 [Note] Aborted connection 411826 to db: '...
1
vote
0answers
106 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
179 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
36 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
60 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
88 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
110 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
130 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
151 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
40 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
47 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
57 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
336 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
273 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 ...
1
vote
2answers
490 views
Mysql backup of remote server in local machine using percona xtrabackup
I had asked this question in serverfault.Later, i came to know about this site.
I have percona xtrabackup installed in my ubuntu client machine. My local machine IP address is 192.168.0.100. The ...
2
votes
0answers
136 views
TokuDB/Percona - Insert Performance worse as table grows
We have a bunch of existing servers which run just fine, inserting our thousand rows/second, but the new batch just will not do it. As the day goes on and the table grows, it gets slower and slower, ...
2
votes
2answers
4k views
How to set MySQL binlog retention in hours?
I'm in a situation where the MySQL log partition is being filled in less than a day. I can't disable binlogs, since I need them for replication.
I know I can set log retention but that accepts days, ...
1
vote
2answers
776 views
ProxySQL user not connecting - XtraDB
I'm trying to set up a xtraDB Cluster consisting of 3 nodes. Now i've got the cluster up and running and per the instructions i'm trying to set up ProxySQL for load balancing.
So i've installed ...
1
vote
2answers
341 views
MySQL XtraDB/Galera Cluster High Availability RamDisk *SuperFast*
Ok, So this is going to be a speculative question, mostly design oriented and a rather long one. I'd grab a cuppa' covfefe, if I were you.
Preface: So I have been researching into databases and ...
