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

 | August 4, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

MySQL QA Episode 11

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 a regular or semi-regular basis. Pro’s/Why Con’s How Using the latest version sudo [yum/apt-get] install valgrind #OR# sudo [yum/apt-get] remove […]

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MySQL QA Episode 10: Reproducing and Simplifying: How to get it Right

 | July 31, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

MySQL QA Episode 10

Welcome to the 10th episode in the MySQL QA series! Today we’ll talk about reproducing and simplifying: How to get it Right. Note that unless you are a QA engineer stuck on a remote, and additionally difficult-to-reproduce or difficult-to-reduce bug, this episode will largely be non-interesting for you. However, what you may like to see […]

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MySQL QA Episode 9: Reducing Testcases for Experts: multi-threaded reducer.sh

 | July 28, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

Welcome to MySQL QA Episode 9. This episode will go more in-depth into reducer.sh: Reducing Testcases for Experts: multi-threaded reducer.sh We will explore how to use reducer.sh to do true multi-threaded testcase reduction – a world’s first. Topics: Expert configurable variables & their default reducer.sh settings PQUERY_MULTI PQUERY_MULTI_THREADS PQUERY_MULTI_CLIENT_THREADS PQUERY_MULTI_QUERIES PQUERY_REVERSE_NOSHUFFLE_OPT Full-screen viewing @ 720p resolution […]

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MySQL QA Episode 8: Reducing Testcases for Engineers: tuning reducer.sh

 | July 23, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

Welcome to MySQL QA Episode 8: Reducing Testcases for Engineers: tuning reducer.sh Advanced configurable variables & their default/vanilla reducer.sh settings FORCE_SKIPV FORCE_SPORADIC TIMEOUT_COMMAND & TIMEOUT_CHECK MULTI_THREADS MULTI_THREADS_INCREASE QUERYTIMEOUT STAGE1_LINES SKIPSTAGE FORCE_KILL Some examples FORCE_SKIPV/FORCE_SPORADIC TIMEOUT_COMMAND/TIMEOUT_CHECK Full-screen viewing @ 720p resolution recommended.

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MySQL QA Episode 6: Analyzing and Filtering

 | July 15, 2015 |  Posted In: Insight for DBAs, Insight for Developers, Percona Server, Percona Software, Quality Assurance

Welcome to MySQL QA Episode #6! Today we will look into analyzing and filtering our QA run. We’ll use tools like pquery-prep-red.sh, pquery-clean-known.sh & pquery-results.sh 1. Quick re-cap and QA run setup 2. pquery-prep-red.sh 3. pquery-clean-known.sh 4. pquery-results.sh 5. Bonus: pquery reach – pquery-reach++.sh We’ll also introduce the text_string.sh tool which extracts a most-specific text string […]

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MySQL QA Episode 5: Preparing Your QA Run with pquery

 | July 13, 2015 |  Posted In: Insight for DBAs, Insight for Developers, Percona Server, Percona Software, Quality Assurance

Welcome to MySQL QA Episode #5! In this episode we’ll be setting up and running pquery for the first time… and I’ll also trigger some actual bugs (fun guaranteed)! I’ll also introduce you to mtr_to_sql.sh and pquery-run.sh. pquery-run.sh (the main wrapper around pquery) is capable of generating 80-120 MySQL Server crashes – per hour! See how […]

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MySQL QA Episode 4: QA Framework Setup Time!

 | July 8, 2015 |  Posted In: Insight for DBAs, Insight for Developers, Percona Server, Percona Software, Quality Assurance

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 pquery framework tools The tools introduced in this episode will be covered further in next two episodes. Full-screen viewing @ […]

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Choosing a MySQL HA Solution – Post-Webinar Q&A

 | June 7, 2013 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Technical Webinars

Thanks to everyone who was in attendance on 05 June 2013 for my “Choosing a MySQL HA Solution” webinar. If you weren’t able to make it but are interested in listening to the presentation, it’s currently up and available for viewing over at percona.com. My apologies if we weren’t able to get to your question […]

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