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Linux IO Schedulers and MySQL

Found a great article about Linux IO Schedulers today which is quite interesting. It goes in details about schedulers and explains in which of workloads which of schedulers is best. The interesting thing this article …

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MySQL is crashing: a support engineer’s point of view

In MySQL QA Episode #12, “MySQL is Crashing, now what?,” Roel demonstrated how to collect crash-related information that will help Percona discover what the issue is that you are experiencing, and fix it. As a Support …

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MySQL Quality Assurance: A Vision for the Future by Roel Van de Paar (Final Episode 13)

Welcome to the final – but most important – episode in the MySQL QA Series. In it, I present my vision for all MySQL Quality Assurance – for all distributions – worldwide. Episode 13: A Better …

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MySQL QA Episode 12: My server is crashing… Now what? For customers or users experiencing a crash

My server is crashing… Now what? This special episode in the MySQL QA Series is for customers or users experiencing a crash. A crash? Cheat sheet: https://goo.gl/rrmB9i Sever install & crash. Note this is as a demonstration: do …

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MySQL QA Episode 11: Valgrind Testing: Pro’s, Con’s, Why and How

Today’s episode is all about Valgrind – from the pro’s to the con’s, from the why to the how! This episode will be of interest to anyone who is or wants to work with Valgrind on …

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How to create a rock-solid MySQL database backup & recovery strategy

Have you ever wondered what could happen if your MySQL database goes down? Although it’s evident such a crash will cause downtime – and surely some business impact in terms of revenue – can you …

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MySQL QA Episode 4: QA Framework Setup Time!

Welcome to MySQL QA Episode 4! In this episode we’ll look into setting up our QA Framework: percona-qa, pquery, reducer & more. 1. All about percona-qa 2. pquery

3. reducer.sh

4. Short introduction to …

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Using Cgroups to Limit MySQL and MongoDB memory usage

Quite often, especially for benchmarks, I am trying to limit available memory for a database server (usually for MySQL, but recently for MongoDB also). This is usually needed to test database performance in scenarios with …

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MySQL QA Episode 2: Build a MySQL server – Git, Bazaar, Compiling & Build tools

Welcome to MySQL QA Episode 2: Build a MySQL Server – Git, Bazaar (bzr), Compiling, and Build Tools In this episode you’ll learn how to build Percona Server and/or MySQL Server for QA purposes & …

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Generated (Virtual) Columns in MySQL 5.7 (labs)

About 2 weeks ago Oracle published the MySQL 5.7.7-labs-json version which includes a very interesting feature called “Generated columns” (also know as Virtual or Computed columns). MariaDB has a similar feature as well: Virtual (Computed) Columns. The …

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