In part one and part two of this series, we introduced the different ways to manage MySQL configurations and precedence when using the Percona XtraDB Cluster (PXC) object and ConfigMap. In this post, we will see the precedence when secrets are used for MySQL configurations in Percona Operator for MySQL based on Percona XtraDB Cluster.

CASE-4: Secret with name cluster1-pxc and ConfigMap with name cluster1-pxc but without configuration in PXC object

When the MySQL configuration is present in the ConfigMap and secret but not in the PXC …

Just as you want to filter the rows of data returned in a SELECT query with the equality comparison operator (=), you can also create a conditional filter to test if 2 values are not equal to one another. Learn more in the following article.

The Newsletter for PHP and MySQL Developers

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Image by Peggy und Marco Lachmann-Anke from  …

The cost of downtime can range from loss of business to severe reputation damage. Database downtime feels inevitable but is often preventable. The causes of database issues that lead to downtime can be categorized in the following ways: Human error System immaturity Application issues In this post, we will explore how PlanetScale can mitigate all three. Downtime due to human error We’ve all done it, dropped the wrong table or index and caused queries to dramatically slow or fail. This can lead to entire site outages, as well as cascading failure that impacts other systems. With standard MySQL, if you drop a table that you later find out was still in use, you are in a situation where you now have to restore from backup. Selecting the right backup, restoring, and bringing your site back online can take hours, which of course leads to high levels of stress for you and your team. To help prevent this type of outage, PlanetScale warns you if the table …

Learn how PlanetScale protects against downtime due to human error system immaturity and app issues.

In part one of this series, we introduced the different ways to manage MySQL configurations. In this post, we will walk through different possibilities and the changes happening while modifying MySQL configurations with the operator.

Percona Distribution for MySQL Operator based on Percona XtraDB Cluster (PXC) provides three ways for managing MySQL, but the question is, what is the precedence among options? We will walk through several cases of using MySQL configs. For the sake of simplicity, we will play with the values of the Galera cache to see the effects.

configuration: |
   [mysqld] …

We are moving right along with the OpenLampTech publication. This week’s issue has a great developer interview, in addition to all the curated MySQL, PHP, and LAMP stack content you’ve come to expect. Let’s get to it. Enjoy OpenLampTech issue #37!

The Newsletter for PHP and MySQL Developers

Receive a copy of my ebook, “10 MySQL Tips For Everyone”, absolutely free when you subscribe to the OpenLampTech newsletter.

In OpenLampTech issue #37, I’m sharing articles on:

• MySQL Generated Columns
• PHP solutions to common problems
• Interview with freelance Laravel web developer Ash Allen
• PHP cURL library article
…

In this blog, I will cover important aspects which you need to test when benchmarking replication setup. MySQL has great tools that could be used to test its performance. They include:

sysbench – https://github.com/akopytov/sysbench

BMK-kit – http://dimitrik.free.fr/blog/posts/mysql-perf-bmk-kit.html

mysqlslap – https://dev.mysql.com/doc/refman/8.0/en/mysqlslap.html

LinkBench – https://github.com/facebookarchive/linkbench

I will not describe how to use them here, as you can find instructions on the provided links or in the Percona blog by browsing tags …

We’ve been measuring MySQL replication lag with heartbeats for more than a decade. It works, but can we do better? Let’s see.

We’ve been measuring MySQL replication lag with heartbeats for more than a decade. It works, but can we do better? Let’s see.

We’ve been measuring MySQL replication lag with heartbeats for more than a decade. It works, but can we do better? Let’s see.