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MariaDB Galera Cluster upgrade test results overview 10.3 -> 10.4
Recently MariaDB Galera Cluster 10.4.3 RC was announced – Galera MariaDB 10.4.3 RC I would like to summarize overall reported issues related to Upgrade Tests from 10.3 version to 10.4. In general we...
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The weird messages Anthology of MySQL – Episode 1
Hi dear community. Today I want to share with you some funny and weird error messages which can be extremely annoying So let’s begin: CREATE temporary TABLE `sbtest1_temp` ( `id` int(11) NOT NULL...
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Doc BUGs – an easy way to contribute Open Source project(part-1)
In this topic I would like to make some notes about questions, how we can contribute or help on Open Source project. The first thing is, to learn the product itself, how to install, how to remove, how...
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Running simultaneous queries with Python, for killing them
This topic is about, simple approach to run multiple sql statements for testing XtraBackup behaviour – if it is going to kill them due to blocked FTWRL(FLUSH TABLES WITH READ LOCK). According to the...
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MySQL blank users preventing slave I/O connection?
Hi, Recently I have encountered a weird simple issue with starting Slave server. So created user as tried to run change master: 2017-10-30 14:03:59 DEBUG Running ->...
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XtraBackup vs. OOM killer(usage of mprof)
This small article is about nicely depicting memory usage prior to OOM killers show. I have started MySQL with:...
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How to combine BATS, PyTest and MySQL X Plugin for tests
Hi, In this post I am going to show some tricks on using BATS framework + PyTest + Python X Plugin things, to have combined, simple test solutions. Let’s describe MySQL X Plugin side, here is the full...
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Using MySQL Connector/Python X (mysqlx module) MyRocks episode
This post is about, how I have tried to make simple Python script using mysqlx module work with MyRocks. This is also related to pytest, as I have implemented simple pytest tests to call them from bash...
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Using MySQL Connector/Python X (mysqlx module)
This post is about simple usage of mysqlx module i.e X Plugin with latest Connector/Python DMR. The version of Python Connector is 8.0.4. Installing: wget...
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Testing MySQL 8.0 – let me create a ton of undo files
This is the late blog post about 2 recent bug reports #85969 #85971 The basic idea came after reading -> http://mysqlserverteam.com/the-mysql-8-0-1-milestone-release-is-available/ So the result of...
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Experimental MySQL UDF code partially written in Python
Hi dear all, I would like to share our experimental tests about, writing UDF with Python. So the basic idea was writing a UDF for factorial calculation. The interesting part was to move factorial...
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My first patch for MySQL world; fixing BUG #76852
Hi dear MySQL Community. I have reported a bunch of bugs and wrote some articles, but today is a special for me Because today I send my first PR for MySQL source code. So I have logged a bug ->...
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Playing with MySQL Source code; Adding “STOP ALL SLAVES” command
This blog post is a result of reading book. To be clear -> “Expert MySQL” by Charles Bell -> http://www.apress.com/gp/book/9781430246596 This book explain internals of MySQL based on 5.6.x...
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Getting started MySQL Group Replication on Ubuntu with MySQL Sandbox
Welcome to next topic dedicated to Group Replication plugin. Today’s topic is to get started with Group Replication. As you remember we set up our environment using MySQL Sandbox on Ubuntu 14.04 and...
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MySQL Sandbox, creating test environment for Group Replication plugin
Today’s topic is about how to test Group Replication plugin in easy way, with using MySQL Sandbox But firstly we must compile MySQL with Group Replication plugin, refer to previous topic ->...
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Compiling MySQL Group Replication plugin with MySQL 5.7.8-rc2 on Ubuntu
MySQL Group Replication plugin is in labs.mysql.com and is available for EL6 x86_64 version Linux. But most of us have Ubuntu desktops where it should be easier to test this new thing, especially with...
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MySQL Group Replication plugin issues with 5.7.8-rc2
Well the new things are cool to test and learn. But it is not possible every time, to have smooth testing process. if you can’t get right software on your hand. So there are great articles about this...
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The origin of “Assertion Failed” errors in MySQL
Recently, we have discussed BUGs with our local community members. Where the half off people said that, they have seen “Assertion Failure” errors in error log. And the question was what is this at all?...
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Installing MySQL from source – CMAKE issues
Today’s topic is related primarily to compiling MySQL from source using CMAKE and what kind of issues we encounter during this task. We want to install MySQL 5.6.19 with Debug+Valgrind etc. On CentOS 7...
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Unknown column ‘smth’ in ‘field list’ -> Oldie but goodie error
There is an error which is definitely new to people which have encountered such situation at first time. It was reported a long time before: #1689 -> 28 Oct 2003 4:46 #1478 -> 4 Oct 2003 10:58...
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