We are pleased to announce the release of PMM 2 Beta!  PMM (Percona Monitoring and Management) is a free and open-source platform for managing and monitoring MySQL, MongoDB, and PostgreSQL performance.

• Query Analytics:
  • MySQL and MongoDB – Slow log, PERFORMANCE_SCHEMA, and Profiler data sources
  • Support for large environments – default view all queries from all instances
  • Filtering – display only the results matching filters such as the schema name or the server instance
  • Sorting and more columns – now sort by any column.
  • Modify Columns – Add one or more columns for any field exposed by the data source
  …

ProxySQL 2.0.4, released by ProxySQL, is now available for download in the Percona Repository along with Percona’s proxysql-admin tool.

ProxySQL is a high-performance proxy, currently for MySQL and database servers in the MySQL ecosystem (like Percona Server for MySQL and MariaDB). It acts as an intermediary for client requests seeking resources from the database. René Cannaò created ProxySQL for DBAs as a means of solving complex replication topology issues.

This release includes ProxySQL 2.0.4 which fixes many bugs and introduces a number of features …

Percona announces the release of Percona Server for MySQL 5.7.26-29 on May 27, 2019 (downloads are available here and from the Percona Software Repositories). This release merges changes of MySQL 5.7.26, including all the bug fixes in it. Percona Server for MySQL 5.7.26-29 is now the current GA release in the 5.7 series. All of Percona’s software is open-source and free.

New Features:

• New …

“Hey, what’s going on with my applications? I installed a newer version of MySQL. I have queries that perfectly run with the older version and now I have a lot of errors.”

This is a question some customers have asked me after upgrading MySQL. In this article, we’ll see what one of the most frequent causes of this issue is, and how to solve it.

We are talking about this error:

ERROR 1055 (42000): Expression #2 of SELECT list is not in GROUP BY clause 
and contains nonaggregated column 'test.web_log.user_id' which is not functionally 
dependent on columns in GROUP BY clause; this is incompatible 
with sql_mode=only_full_group_by

Have you ever seen it?

SQL_MODE

As the first thing let me introduce the concept of SQL_MODE.

MySQL can work using different SQL modes that affect the syntax of the queries and validation checks. Based on the configured value of the …

Percona is glad to announce the release of Percona XtraBackup 8.0.6 on May 9, 2019. You can download it from our download site and apt and yum repositories.

Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, it …

In my previous post Running MySQL/Percona Server in Kubernetes with a Custom Config I’ve looked at how to set up MySQL in Kubernetes to utilize system resources fully. Today I want to measure if there is any performance overhead of running MySQL in Kubernetes, and show what challenges I faced trying to measure it.

I will use a very simple CPU bound benchmark to measure MySQL performance in OLTP read-only workload:

sysbench oltp_read_only --report-interval=1 --time=1800 --threads=56 --tables=10 --table-size=10000000 --mysql-user=sbtest --mysql-password=sbtest --mysql-socket=/var/lib/mysql/mysql.sock run

The hardware is as follows:

Supermicro server

• Intel(R) Xeon(R) CPU E5-2683 v3 @ 2.00GHz
• 2 sockets / 28 cores / 56 threads
• Memory: 256GB of …

Percona announces the release of Percona Server for MySQL 8.0.15-6 on May 7, 2019 (downloads are available here and from the Percona Software Repositories).

This release is based on MySQL 8.0.14 and 8.0.15. It includes all bug fixes in these releases. Percona Server for MySQL 8.0.15-6 is now the current GA release in the 8.0 series. All of Percona’s software is open-source and free.

Percona Server for MySQL 8.0 includes all the features available in MySQL 8.0 Community Edition in addition to enterprise-grade features developed by …

Percona is glad to announce the release of Percona XtraBackup 2.4.14 on May 1, 2019. You can download it from our download site and apt and yum repositories.

Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered free as an open source solution, it …

Percona announces the release of Percona XtraDB Cluster Operator 0.3.0 early access.

The Percona XtraDB Cluster Operator simplifies the deployment and management of Percona XtraDB Cluster in a Kubernetes or OpenShift environment. It extends the Kubernetes API with a new custom resource for deploying, configuring and managing the application through the whole life cycle.

You can install the Percona XtraDB Cluster Operator on Kubernetes or OpenShift. While the operator does not support all the Percona XtraDB Cluster features in this early access release, instructions on how to install and configure it …

Percona announces the release of Percona Server for MySQL 8.0.15-5 on March 15, 2019 (downloads are available here and from the Percona Software Repositories).

This release includes fixes to bugs found in previous releases of Percona Server for MySQL 8.0.

Incompatible changes

In previous releases, the audit log used to produce time stamps inconsistent with the ISO 8601 standard. Release 8.0.15-5 of Percona Server for MySQL solves this problem. This change, however, may break programs that rely on the old time stamp …