Search Results for: mysql set query

Why base64-output=DECODE-ROWS does not print row events in MySQL binary logs

Lately I saw many cases when users specified option --base64-output=DECODE-ROWS  to print out a statement representation of row events in MySQL binary logs just to get nothing. Reason for this is obvious: option --base64-output=DECODE-ROWS  does not convert row events into its string representation, this is job of option --verbose . But why users mix these […]

Multi-source replication in MySQL 5.7 vs Tungsten Replicator

MySQL 5.7 comes with a new set of features and multi-source replication is one of them. In few words this means that one slave can replicate from different masters simultaneously. During the last couple of months I’ve been playing a lot with this trying to analyze its potential in a real case that I’ve been […]

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

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

The Q&A: Creating best-in-class backup solutions for your MySQL environment

Thank you for attending my July 15 webinar, “Creating Best in Class Backup solutions for your MySQL environment.” Due to the amount of content we discussed and some minor technical difficulties faced near the end of webinar we have decided to cover the final two slides of the presentation along with the questions asked by […]

MySQL QA Episode 8: Reducing Testcases for Engineers: tuning

Welcome to MySQL QA Episode 8: Reducing Testcases for Engineers: tuning Advanced configurable variables & their default/vanilla 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.

MySQL QA Episode 7: Reducing Testcases for Beginners – single-threaded!

Welcome to MySQL QA Episode #7 – Reducing Testcases for Beginners: single-threaded! In this episode we’ll learn how to use Topics discussed; introduction/concepts Basic configurable variables & their default settings INPUTFILE options MODE=x TEXT=”text” WORKDIR_LOCATION & WORKDIR_M3_DIRECTORY MYEXTRA MYBASE PQUERY_MOD & PQUERY_LOC MODE5_COUNTTEXT, MODE5_ADDITIONAL_TEXT & MODE5_ADDITIONAL_COUNTTEXT How to learn more about each […]

MySQL QA Episode 6: Analyzing and Filtering

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

MySQL QA Episode 5: Preparing Your QA Run with pquery

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 and (the main wrapper around pquery) is capable of generating 80-120 MySQL Server crashes – per hour! See how […]

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


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