This article demonstrates how MySQL sharding with ProxySQL works.

Recently a colleague of mine asked me to provide a simple example on how ProxySQL performs sharding.

In response, I’m writing this short tutorial in the hope it will illustrate ProxySQL’s sharding functionalities, and help people out there better understand how to use it.

ProxySQL is a very powerful platform that allows us to manipulate and manage our connections and queries in a simple but effective way. This article shows you how.

Before starting let’s clarify some basic concepts.

• ProxySQL organizes its internal set of servers in Host Groups (HG), and each HG can be associated with users and Query Rules (QR)
• Each QR can be final (apply = 1) or = let ProxySQL continue to parse other QRs
• A QR can be a rewrite action, be a simple match, have a specific target HG, or be generic
• QRs are defined …

This blog discusses how to find and address badly written queries using ProxySQL.

All of us are very good in writing good queries. We know this to always be true!

But sometimes a bad query escapes our control and hits our database. There is the new guy, the probie, who just joined the company and is writing all his code using SELECT * instead of WHERE. We’ve told him “STOP” millions of times, but he refuses to listen. Or a there is a new code injection, and it will take developers some time to fix and isolate the part of the code that is sending killing queries to our database.

The above are true stories; things that happen every day in at least few environments.

Isolating the bad query isn’t the main problem: that is something that we can do very fast. The issue is identifying the code that is generating the query, and disabling that code without killing the whole application.

That …

How do you scale Percona XtraDB Cluster with ProxySQL in Kubernetes?

In my previous post I looked how to run Percona XtraDB Cluster in a Docker Swarm orchestration system, and today I want to review how can we do it in the more advanced Kubernetes environment.

There are already some existing posts from Patrick Galbraith (https://github.com/kubernetes/kubernetes/tree/release-1.2/examples/mysql-galera) and Raghavendra Prabhu (https://github.com/ronin13/pxc-kubernetes) on this topic. For this post, I …

In this blog post, we’ll discuss ProxySQL versus MaxScale for OLTP RO workloads.

Continuing my series of READ-ONLY benchmarks (you can find the other posts here: https://www.percona.com/blog/2016/04/07/mysql-5-7-sysbench-oltp-read-results-really-faster/ and https://www.percona.com/blog/2016/03/28/mysql-5-7-primary-key-lookup-results-is-it-really-faster), in this post I want to see how much overhead a proxy adds. At this

In my opinion, there are only two solid proxy software options for MySQL at the moment: ProxySQL and MaxScale. In the past, there was also MySQL Proxy, but it is pretty much dead for now. Its replacement, MySQl Router, is still in the very early stages …