Questions tagged [percona]
Percona : MySQL open source fork with performance improvements
331
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pt-online-schema-change failed when creating new tablle, specified key was too long; max key length is 767 bytes issue
The version, mysql is InnoDB 5.6.10-log, pt-online-schema-change 3.1.0. table info is
`email` varchar(225) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
`uid` varchar(255) COLLATE utf8mb4_unicode_ci ...
- 101
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0
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13
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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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0
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8
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Percona MySQL 5.7 to 8.0
I wondered if anyone has successfully upgraded percona 5.7 to 8.0 with a fully populated database. All the articles I've read suggest it is possible but I've tried twice in a test environment and ...
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1
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51
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MySQL insert on an empty table takes 38.91ms
This DB is running in a cluster.
Insert/Update queries are taking more than 30ms to execute. Select queries are quick with less than 5ms.
We are already following this guide: here
From Laravel Query ...
- 113
1
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1
answer
44
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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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0
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45
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pt-table-sync perfomance/load on a production MySQL RDS instance
Hi Percona User group,
I’m trying to access the performance implication of using pt-table-sync tool to replicate a collection of tables from a schema on production server (on load) to a replica schema ...
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votes
2
answers
410
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How to avoid replication lag in case all writes on master and reads on replica?
I have stuck with the replication lag problem. I am trying to refactor my DB infrastructure.
The first step was read-write split. I used ProxySQL то implement it. Now I have masterDb where all INSERT ...
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0
answers
100
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replicate-wild-do-table causes unknown database error My-001049 for CREATE PROCEDURE on not replicated schema
OS: RHEL 7.7
Percona server 8.0.26-16
I am trying to create a simple replication topology with one master and one slave. The master has 9 schema out of which three are being replicated to the slave.
...
0
votes
1
answer
56
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Cannot prepare backup with innobackupex
I taken full backup from a Master server with innobackupex.
Now I am restoring backup with innobackupex on a Slave server.
I prepare backup with the command:
innobackupex --defaults-file=/var/lib/...
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1
vote
3
answers
81
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Improving performance for large volume of simultaneous reads/writes on Percona 8
A general description of the environment and the use case:
Technical:
We're running a distributed application with a single server and ~25 clients; each client is running ~75 threads.
At one ...
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1
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0
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73
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PHP PDO Connect sometimes takes a long time to connect using mysql percona
I have a more or less simple application, written in php 7.4, using PDO to connect to my database. This connect usually takes under 0.0002 seconds > we are talking about 99.9% of my requests. On ...
- 111
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3
answers
2k
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Downgrade mysql 8.0.27 to 8.0.26 ubuntu 20.04
I set up a new AWS EC2 instance with Ubuntu 20.04, php, Apache, and mySQL. I also installed N-Able (Solarwinds) server backup.
I am able to do system and file backups but the mySQL backup fails. N-...
PeteS
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1
answer
91
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Drop column with percona does not shrink table size
I have a table in Aurora MySQL 5.7. table has few partitions with 800m rows and weights 2tb.
Recently I dropped few column using percona. Surprisingly the table size did not change (looking in ...
- 393
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2
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180
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Steps to remove node from percona cluster
I have to update the os on a few servers and I need to remove a db from the cluster.
wsrep_cluster_address='gcomm://192.168.2.59,192.168.2.60,192.168.2.61,192.168.2.62,192.168.2.63'
Do I remove the ...
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1
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1
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88
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MySQL8: xtrabackup Invalid stream argument: tar
I am using xtrabackup to take full backup and send it to another host as .tar file using the following backup command:
xtrabackup --backup -u root -p --no-lock --compress --stream=tar --datadir=/...
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1
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152
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Install Percona Data Recovery Tool for InnoDB on Ubuntu 18
Has anyone successfully installed the Percona Data Recovery Tool for InnoDB on Ubuntu 18? I downloaded the tool here: https://launchpad.net/percona-data-recovery-tool-for-innodb/trunk/release-0.5/+...
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1
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218
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InnoDB: Assertion failure on executing select Query - MySQL 5.7.31
I am using pt-archiver for daily archiving of tables, but while selecting data from one tables I am getting following error and it restart mysql instance
2021-07-07 13:21:17 0x7fe0dffdc700 InnoDB: ...
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0
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329
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Importing A Database Into MySQL Has A Cluster System
I have a big issue. I want to import a database to mysql-server in a Centos 7 system. But there is a cluster structure on the servers. I set pxc_strict_mode=ENFORCING in wsrep.conf file. I have not to ...
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1
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24
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Percona MySQL: Restore incremental backup to a new server
I know it is possible to set up a new database instance on a new server, using a full backup that has been prepared. This is useful for several things, not least if your server has failed completely; ...
- 221
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2
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188
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Connect two Percona XtraDB Clusters in two data centers
I have been trying to figure this out the past couple of weeks. We used to have a five-host Percona cluster at different providers. When it started acting up I read that it is a bad idea to have ...
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1
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1
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849
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ERROR 1180 (HY000): Got error 5 during COMMIT
We're using Galera cluster and I'm running below statement to make a new table:
create table tab2 select distinct id , report from my_table ;
It runs for sometime and after that it fails/cancel ...
1
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1
answer
153
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truncate table in mysql 8.0 is slower than older version
I have few hundreds of tests which use mysql. I was using Mysql 5.7 (percona) and I changed it to Mysql 8.0 . My problem is that before every test I truncate ALL my tables. This was fine with 5.7 but ...
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1
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654
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"Percona-XtraDB-Cluster prohibits use of ALTER command on a table (<example>) that resides in non-transactional storage engine"
I installed a Percona XtraDB cluster with pxc_strict_mode set to ENFORCING, and am trying to import databases from non-Galera MariaDB servers. This works fine for some databases, by dumping them via ...
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1
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1
answer
276
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MySQL 8.0.20 - Master Replica scheme, increasing delay between Source and Replica
We have a Source Database of about 1TB, and a Replica on another server (similar architecture).
We have setup Master Slave replication and delay between Master and Slave is always growing since.
...
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1
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0
answers
284
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Proxysql setup for Percona PXC Multimaster cluster
I have a clean Ubuntu lab setup for PXC Cluster and Proxysql (each a separate VM)and i'm seeing this issue (error below).
Is there a specific installation that needs to be followed for PXC cluster? I ...
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1
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277
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Can't restore master/slave replication from Percona backup (slave server)
A slave is restored from a master backup created with Percona xtrabackup
On the master binlog is set to expire in 14 days and this backup is less than 24 hours old
my.cnf (master)
expire_logs_days = ...
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0
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232
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MySQL undo logs not truncating
I have MySQL Percona version 5.7, with 3 undo logs, but I don't know why truncating logs is not working.
I enabled innodb_undo_log_truncate, decreased innodb_purge_rseg_truncate_frequency to 32
show ...
2
votes
3
answers
1k
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Can I disable binlogs to save space temporarily
I am using percona mysql 8.
I do not use any type of replication, but I read that binlogs are useful for data recovery. I would like to turn of binlogging and flush them while I run pt-online-schema-...
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1
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0
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222
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MySQL 5.7 (Percona Server) PAM LDAP authentication from Workbench 8.0 on Windows
I have a server running Percona Server 5.7 and enabled PAM LDAP authentication.
I can connect with LDAP user from:
mysql client
MySQL Workbench 8.0 on Linux (Ubuntu) with dialog.so plugin copied from ...
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0
answers
63
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Will Federated engine work with pxc cluster
I'm a bit new to MySQL specific settings and I can't find any hint/insight to this question.
I have several Federated tables that work great for their current purpose, the rest of the database is in ...
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1
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1
answer
51
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mysql percona 5.7 not releasing memory
we are using percona mysql 5.7 version.
MySQL not releasing the memory after operation complete.
we are very much grateful if anyone can guide us to resolve issue.
Thanks
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0
answers
104
views
Xtrabackup 8.0 Error
I'm using Percona MySQL 8.0.20 running on Ubuntu 18.04 on an AWS ec2 m5.2xlarge instance. The Xtrabackup version being used is 8.0.14.
While testing the restore process, I'm getting the error as ...
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1
answer
105
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mysql client auto reconnect in case of ERROR 2013
I'm searching for a way how to instruct mysql client to reconnect in case of ERROR 2013. I'm testing PXC with ProxySQL and want to keep sql statements flowing from the client in case when the writer ...
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2
answers
192
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Monitoring slow queries on large database (Percona 5.6)
I am looking for a solution to monitor very large production database (many replicas, over 200 tables, some of tables have 10-50 GB of data) with a lot of traffic (a wide set of query complexity).
The ...
- 111
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1
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126
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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 (...
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0
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109
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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'...
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1
answer
105
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Innobackupex (Xtrabackup) 2.4.8 incremental backups take the same time as full backup
We have our operational as well as decision making databases both running on Percona MySQL 5.7.10. The OS is Ubuntu 16.04. On these various database instances we have been using Percona Innobackupex (...
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1
vote
1
answer
489
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Transferring innodb table
I have a 30GB innoDB-only database that keeps having Lost connection to MySQL server during query when dumping when running mysqldump -u root -p --compress --max_allowed-packet=1G --net-buffer-...
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0
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16
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Upgrading Debian version of PXC production cluster
I have a 3 node PXC 5.7 cluster behind a ProxySQL instance. The cluster is still running on Debian 8.
I have setup recently a testing PXC 5.7 cluster with a copy of the database on Debian 10 without ...
1
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1
answer
2k
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MySQL: how to prevent deadlock on concurrent inserts
Percona Server 5.6.39-83.1-log
Table structure:
CREATE TABLE `myTable` (
`column_1` VARCHAR(50) NOT NULL DEFAULT '',
`column_2` VARCHAR(50) NOT NULL DEFAULT '',
`column_3` VARCHAR(50) ...
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2
answers
104
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Percona XtraDB Cluster (5.6.28-76.1-56-log) - random OOM events
We have a multi-node (each of 64G RAM) cluster. The main (the one we use for mutating data) node randomly just OOMs, this happens both in peak times and in extremely quiet times.
What we've noticed ...
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1
answer
93
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Unusually low insert rate on MySQL Slaves
I have 4 MySQL nodes replicating like this:
M1 - S1
|
M2 - S2
Only the M1 master is writing, the hardware is similar (the slaves are a bit beefier), they all run Percona 5.7.
The trouble is that ...
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1
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76
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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 ...
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0
answers
23
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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 ...
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1
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122
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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 ...
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1
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37
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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.
*** ...
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3
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0
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596
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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:~...
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1
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56
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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.
...
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1
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69
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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 |
+------...
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0
answers
45
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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 ...
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