This blog was originally published in February 2017 and was updated in September 2023.

In this blog post, I provide an in-depth introduction to MySQL Replication, answering what it is, how it works, its benefits and challenges, as well as reviewing some of the MySQL replication concepts that are part of the MySQL environment (and Percona Server for MySQL specifically). I will finish by also clarifying some of the common misconceptions people have about replication and how Percona can help.

Since I’ve been working on the Solution Engineering team, I’ve noticed that – although information is plentiful – replication is often misunderstood or incompletely understood.

What is MySQL Replication?

MySQL replication is …

A blog series about ProxySQL and Galera…

This post is the first of a series of blogposts on how to easily use ProxySQL to scale-out your application’s database workload on a Galera cluster. This series will explore the main concepts in configuring ProxySQL for Galera across three articles as follows:

– A first introductory post describing the minimal configuration needed for ProxySQL to monitor and manage a Galera Cluster.
– A second post describing how to setup a read/write split configuration for our Galera Cluster, using ProxySQL query rules.
– A third and final post with examples on specific cluster configuration options and more detailed explanations on why and how ProxySQL changes the nodes states based on configuration changes and monitored variables. Requirements

To illustrate how to configure ProxySQL for a Galera Cluster we will use a sample Galera Cluster …

The latest enhancement in ProxySQL v2.0.0 is the native support of Galera Cluster. No more need to use an external script within the scheduler like explained also in this post of ours.

This document will cover how to take an advantage of the new feature and integrate ProxySQL with Percona XtraDB Cluster to monitor galera node status and read-write split performed by ProxySQL. To illustrate we will use a cluster of 3 nodes, below are the details:

Please join Percona’s Senior Technical Manager, Alkin Tezuysal, and Percona’s Percona XtraDB Cluster Lead, Krunal Bauskar as they present their talk, Percona XtraDB Cluster: Failure Scenarios and their Recovery on Wednesday, January 30th, 2019, at 8:00 AM PST (UTC-8) / 11:00 AM EST (UTC-5).

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Percona XtraDB Cluster (a.k.a PXC) is an open source, multi-master, high availability MySQL clustering solution. PXC works with your MySQL / …

In this post we will review the most important Linux settings to adjust for performance tuning and optimization of a MySQL database server. We’ll note how some of the Linux parameter settings used OS tuning may vary according to different system types: physical, virtual or cloud. Other posts have addressed MySQL parameters, like Alexander’s blog MySQL 5.7 Performance Tuning Immediately After Installation. That post remains highly relevant for the latest versions of MySQL, 5.7 and 8.0. Here we will focus more on the Linux operating system parameters that can affect database performance.

Server and Operating System

Here are some Linux parameters that you should check and consider modifying if you need to improve database performance.

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Please join Percona’s Principal Architect Alex Rubin as he presents MySQL, Percona XtraDB Cluster, ProxySQL, Kubernetes: How they work together to give you a highly available cluster database environment on Tuesday, May 29th at 7:00 AM PDT (UTC-7) / 10:00 AM EDT (UTC-4).

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In this webinar, Alex will discuss how to deploy a highly available MySQL database environment on Kubernetes/Openshift using …

Please join Percona’s Architect, Tibi Köröcz as he presents Percona XtraDB Cluster 5.7 Tutorial on Wednesday, April 18, 2018, at 7:00 am PDT (UTC-7) / 10:00 am EDT (UTC-4).

Never used Percona XtraDB Cluster before? Come join this 45-minute tutorial where we will introduce you to the concepts of a fully functional Percona XtraDB Cluster.

In this tutorial, we will show you how you can install Percona XtraDB Cluster with ProxySQL, and monitor it with Percona …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

Have you registered for Percona Live already? The tutorial grid, the schedules for day 1 and day 2 are pretty amazing, and there is even an extra track being added, for a total of 10 concurrent/parallel tracks during day 1 & day 2. If you submitted a talk and it didn’t get accepted (competition was high), you should have received a discount code to register for the event.

I plan to write more dedicated blog posts around M|18 and the MariaDB Developer’s …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

Still on Meltdown/Spectre, this time MariaDB Corporation has published Meltdown Vulnerability Impact On MariaDB Server – interesting the comparison between glibc/tcmalloc. Worthy Facebook thread about this too, with a bit of chat about MongoDB performance. Officially MongoDB says a degradation of 10-15%. ScaleGrid has a good post, in which they test MongoDB against …

Join Percona Chief Evangelist Colin Charles as he covers happenings, gives pointers and provides musings on the open source database community.

The CFP for Percona Live Santa Clara 2018 closes December 22, 2017: please consider submitting as soon as possible. We want to make an early announcement of talks, so we’ll definitely do a first pass even before the CFP date closes. Keep in mind the expanded view of what we are after: it’s more than just MySQL and MongoDB. And don’t forget that with one day less, there will be intense competition to fit all the content in.

A new book on MySQL Cluster is out: Pro MySQL NDB Cluster by Jesper Wisborg Krogh and Mikiya Okuno. At 690 pages, it is a weighty tome, and something I fully plan on reading, considering I haven’t played with …