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

 | July 30, 2015 |  Posted In: MySQL, MySQL 101

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 […]

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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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InnoDB vs TokuDB in LinkBench benchmark

 | July 24, 2015 |  Posted In: Benchmarks, MySQL, Percona Server for MySQL, TokuDB

Previously I tested Tokutek’s Fractal Trees (TokuMX & TokuMXse) as MongoDB storage engines – today let’s look into the MySQL area. I am going to use modified LinkBench in a heavy IO-load. I compared InnoDB without compression, InnoDB with 8k compression, TokuDB with quicklz compression. Uncompressed datasize is 115GiB, and cachesize is 12GiB for InnoDB […]

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

 | July 23, 2015 |  Posted In: Hardware and Storage, Insight for DBAs, MySQL, Technical Webinars

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 […]

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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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Percona now offering 24/7 support for MongoDB and TokuMX

 | July 21, 2015 |  Posted In: MongoDB, MySQL

Today Percona announced the immediate availability of 24/7, enterprise-class support for MongoDB and TokuMX. The new support service helps organizations achieve maximum application performance without database bloat. Customers have round-the-clock access (365 days a year) to the most trusted team of database experts in the open source community. The news means that Percona now offers […]

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

 | July 21, 2015 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Quality Assurance

Welcome to MySQL QA Episode #7 – Reducing Testcases for Beginners: single-threaded reducer.sh! In this episode we’ll learn how to use reducer.sh. Topics discussed; reducer.sh introduction/concepts Basic configurable variables & their default reducer.sh 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 […]

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