In the many years we have used MySQL, we got accustomed to the fact that upgrades from MySQL 5.7.11 to 5.7.12 was a minor event. This meant that if something was going wrong, we could roll back the binaries and be happy again.
From MySQL 8, this is no longer true. Any upgrade, even minor, is […]
To set correct system variable values is the essential step to get the correct server behavior against the workload.
In MySQL, we have many System variables that can be changed at runtime, and most of them can be set at the session or global level.
To change the value of a system variable at the […]
ProxySQL in its versions up to 1.x did not natively support Percona XtraDB Cluster (PXC). Instead, it relied on the flexibility offered by the scheduler. This approach allowed users to implement their own preferred way to manage the ProxySQL behaviour in relation to the Galera events.
From version 2.0 we can use native ProxySQL support […]
… or what I should keep in mind in case of disaster
To retrieve and maintain in SQL format the definition of all tables in a database, is a best practice that we all should adopt. To have that under version control is also another best practice to keep in mind.
While doing that may seem […]
Let’s talk about MySQL high availability (HA) and synchronous replication once more.
It’s part of a longer series on some high availability reference architecture solutions over geographically distributed areas.
Part 1: Reference Architecture(s) for High Availability Solutions in Geographic Distributed Scenarios: Why Should I Care?
Part 2: MySQL High Availability On-Premises: A Geographically Distributed Scenario
The Problem
A question I often […]
