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.

New MySQL HeatWave capabilities released in 8.0.30

A few weeks ago, we did a Galera Cluster webinar on Managed Galera Clusters on DigitalOcean.

Some of you may notice that the current version of Galera Manager is 1.6.4, and one of the major fixes we have in there is to support the new API token format of DigitalOcean. DigitalOcean has documented this here: Updated API Tokens new management features: in partnership with GitHub –Secret Scanning, Prefixes, and more! and as a consequence we needed to update to accept new API tokens, or it would fail in deployment. If you’re wondering how to create a …

MySQL 8.0 is now over four years old and Oracle released the latest quarterly offering today with MySQL 8.0.30, which comes with lots of bug fixes and some interesting additions.  This is my take on the release notes for those who do not have the time to wade through them, comments in italics are my comments and reflect the views of only me. 

This is an interesting release with a good many bug fixes and I urge those who need fixes to upgrade as soon as they can. For everyone else, the TL;DR is that unless you are on the Oracle Cloud Infrastructure or one of the fixed bugs is causing you problems, then upgrade at your leisure. 

Deprecation and removals

Setting the  replica_parallel_workers system variable to 0 is now deprecated and to use single threading set replica_parallel_workers=1 instead.  …

As powerful and useful as the CodeIgniter 4 Query Builder class methods and functions are, there are times when you need to hand-craft your own queries. Perhaps they are complex. Or, you would just rather write the raw SQL. Learn how to safely use the input you need – typically as part of the WHERE clause conditional(s) – using 2 different parameter binding variations with examples in MySQL.

Image by Clker-Free-Vector-Images from Pixabay …

Consider this simple Integration Services package. It’s simple because the task is to upload a CSV file to SQL Server. No transformations. Notice the warning in the OLE DB Destination. It’s a string truncation warning. The source column has 50 characters but the target has only 20. So, what? The package may run without errors. […]

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The July 2022 MySQL releases are now available.