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Roel Van de PaarWhat does Anton Ego – a fictional restaurant critic from the Pixar movie Ratatouille – have to do with MySQL 8.0 GA? When it comes to being a software critic, a lot. In many ways, the work of a software critic is easy. We risk very little and thrive on negative criticism, which is fun […]
Percona’s Technical Director of Quality Assurance Roel Van de Paar shares his findings on the quality of MySQL 8.0.3 RC. On 21 September 2017, our upstream friends at Oracle released MySQL 8.0.3 RC as the first MySQL 8.0 Release Candidate. I tested the MySQL 8.0.3 Release Candidate branch with selected Percona bugfixes applied and built […]
ProxySQL Admin (proxysql-admin) is a powerful tool for configuring Percona XtraDB Cluster nodes into ProxySQL. The proxysql-admin tool comes with the ProxySQL package from Percona apt/yum repositories. ProxySQL 1.3.2-1 is now available from the Percona repositories. This release is based on ProxySQL v1.3.2a and introduces the following new changes: proxysql-admin_v1.3.2a.md. Installing on Red Hat or CentOS […]
This post discusses the next MySQL development milestone: MySQL 8.0.1. From the outset, MySQL 8.0 has received plenty of attention. Both this blog (see the MySQL 8.0 search) and other sites around the Internet have covered it. Early reviews seem positive (including my own MySQL 8.0 early bugs review). There is plenty of excitement about the new features. As […]
This blog post discusses an information script for the Percona Monitoring and Management (PMM) tool. In recent news, we announced the fresh-of-the-press Percona Monitoring and Management (or PMM for short) platform. Given the interaction of the different components that together make up PMM, I developed a script that helps provide you information about the status of your PMM installation. You can use this script yourself, or one of our […]
This blog post will look at seven bugs in MySQL 8.0. Friday afternoon is always ideal for a quick look at the early quality of MySQL 8.0! Last Friday, I did just that. If you haven’t heard the news yet, MySQL 8.0 DMR is available for download on mysql.com! Tools to the ready: pquery2, updated 8.0 compatible […]
This blog post highlights a video on how to use regular expressions. It’s been a while since I did the MySQL QA and Bash Training Series. The 13 episodes were quite enjoyable to make, and a lot of people watched the video’s and provided great feedback. In today’s new video, I’d like to briefly go over regular expressions. The session will cover […]
If you haven’t heard the news yet, MySQL 8.0 is apparently the next release of the world-famous database server. Obviously abandoning plans to name the next release 5.8, Percona Server’s upstream provider relabelled all 5.8-related bugs to 8.0 as follows: Reported version value updated to reflect release name change from 5.8 to 8.0 What will MySQL […]
Researching a performance issue, we came to a startling discovery: MySQL 5.7 + binlogs is by default 37-45% slower than MySQL 5.6 + binlogs when otherwise using the default MySQL settings. Test server MySQL versions used: i7, 8 threads, SSD, Centos 7.2.1511 mysql-5.6.30-linux-glibc2.5-x86_64 mysql-5.7.12-linux-glibc2.5-x86_64 mysqld –options: --no-defaults --log-bin=mysql-bin --server-id=2 Run details: Sysbench version 0.5, 4 threads, socket file connection […]
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 Engineer I (Sveta) am very happy to see this post – but as a person who better understands writing than recording – […]
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 Approach to all MySQL Regression, Stress & Feature Testing: Random Coverage Testing & SQL Interleaving 1. pquery Review 2. Random […]
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 not action this on a production server! sudo yum install -y http://www.percona.com/downloads/percona-release/redhat/0.1-3/percona-release-0.1-3.noarch.rpm sudo yum install -y Percona-Server-client-56 Percona-Server-server-56 sudo service […]
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 […]
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 […]
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 […]
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.
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 […]
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 […]
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 […]
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
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$ cd ~; bzr branch lp:percona-qa |
3. reducer.sh
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$ cd ~; bzr branch lp:randgen $ vi ~/randgen/util/reducer/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 @ […]