Planet MySQL Planet MySQL: Meta Deutsch Español Français Italiano 日本語 Русский Português 中文
Showing entries 1 to 10 of 12 2 Older Entries

Displaying posts with tag: Quality Assurance (reset)

MySQL QA Episode 3: How to use the debugging tool GDB
+0 Vote Up -0Vote Down

Welcome to MySQL QA Episode 3: “Debugging: GDB, Backtraces, Frames and Library Dependencies”

In this episode you’ll learn how to use debugging tool GDB. The following debugging topics are covered:

 

1. GDB Introduction
2. Backtrace, Stack trace
3. Frames
4. Commands & Logging
5. Variables
6. Library dependencies
7. c++filt
8. Handy references
– GDB Cheat sheet (page #2): https://goo.gl/rrmB9i
– From Crash to testcase: …








  [Read more...]
Playing with Percona XtraDB Cluster in Docker
+0 Vote Up -0Vote Down

Like any good, thus lazy, engineer I don’t like to start things manually. Creating directories, configuration files, specify paths, ports via command line is too boring. I wrote already how I survive in case when I need to start MySQL server (here). There is also the MySQL Sandbox which can be used for the same purpose.

But what to do if you want to start Percona …

  [Read more...]
MySQL QA Episode 2: Build a MySQL server – Git, Bazaar, Compiling & Build tools
+0 Vote Up -0Vote Down

Welcome to MySQL QA Episode 2: Build a MySQL Server – Git, Bazaar (bzr), Compiling, and Build Tools

In this episode you’ll learn how to build Percona Server and/or MySQL Server for QA purposes & more in this short 25 minute tutorial.

In HD quality (set your player to 720p!)

To watch the other episodes in this series, see the MySQL QA & Bash Linux Training Series post. If you missed MySQL QA Episode 1, it was titled “Bash/GNU Tools & Linux Upskill & …

  [Read more...]
pquery binaries with statically included client libs now available!
+0 Vote Up -0Vote Down

After we released pquery to the community, and as we started logging bug reports with pquery testcases, it quickly became clear that pquery binaries with statically compiled-in client libraries would be of great convenience, both for ourselves and for the community.

(If you haven’t heard about pquery yet, read the pquery introduction blog post, come and join the …

  [Read more...]
MySQL QA Episode 1: Bash/GNU Tools & Linux Upskill & Scripting Fun
+0 Vote Up -1Vote Down

MySQL QA Episode #1: Bash/GNU Tools & Linux Upskill & Scripting Fun

This episode consists of 13 parts, and an introduction. See videos below

In HD quality (set your player to 720p!)

Introduction

Part 1: echo, ls, cp, rm, vi, cat, df, du, tee, cd, clear, uname, date, time, cat, mkdir

Part 2: find, wc, sort, shuf, tr, mkdir, man, more

Part 3: Redirection, tee, stdout, stderr, /dev/null, cat

Part 4: Vars, ‘ vs “, $0, $$, $!, screen, chmod, chown, export, set, whoami, sleep, …

  [Read more...]
Free MySQL QA & Bash/Linux Training Series
+0 Vote Up -0Vote Down

Welcome to the MySQL QA Training Series!

If you have not read our introductory blog post on pquery yet, I’d recommend reading that one first to get a bit of background. The community is enthuastic about pquery, and today I am happy to announce a full training series on pquery and more. Whether you are a Linux or MySQL newbie or a seasoned QA engineer, there is something here for you. From Bash scripting (see episode 1 below), to every aspect of the new pquery framework, it is my hope that you enjoy this …

  [Read more...]
The future of MySQL quality assurance: Introducing pquery
+0 Vote Up -0Vote Down

Being a QA Engineer, how would you feel if you had access to a framework which can generate 80+ crashes – a mix of hitting developer introduced assertions (situations that should not happen), and serious unforeseen binary crashes – for the world’s most popular open source database software – each and ever hour? What if you could do this running on a medium spec machine – even a laptop?

The seniors amongst you may object “But… generating a crash or assertion is one thing – creating a repeatable testcase for the same is quite another.”

Introducing pquery, mtr_to_sql, reducer.sh (the pquery-enabled …

  [Read more...]
How to find bugs in MySQL
+2 Vote Up -0Vote Down

Finding bugs in MySQL is not only fun, it’s also something I have been doing the last four years of my life.

Whether you want to become the next Shane Bester (who is generally considered the most skilled MySQL bug hunter worldwide), or just want to prove you can outsmart some of the world’s best programmers, finding bugs in MySQL is a skill not reserved anymore to top QA engineers armed with a loads of scripts, expensive flash storage and top-range server hardware. Off course, for professionals that’s still the way to go, …

  [Read more...]
QA: Advanced Option Combinatorics (Pairwise Testing): Combinatorial mysqld Option Test Case Generation
+0 Vote Up -0Vote Down

How do we ensure that, when we have 35+ testable option combinations for mysqld, we test each and every combination of them? For example: will a different innodb_log_file_size combined with more innodb_log_files_in_group and a modified innodb_fast_shutdown setting truly not affect Percona’s log archiving feature?

Most option-related bugs are caused by the setting of 1 or 2 mysqld options to a non-standard value. Maybe in an odd situation 3 mysqld options need to be set in …

  [Read more...]
How to Extract All Running Queries (Including the Last Executed Statement) from a Core File?
+1 Vote Up -0Vote Down

This post builds on the How to obtain the “LES” (Last Executed Statement) from an Optimized Core Dump? post written about a year ago.

A day after that post was released, Shane Bester wrote an improved version, How to obtain all executing queries from a core file on his blog. Reading that post is key to understanding what follows.

I …

  [Read more...]
Showing entries 1 to 10 of 12 2 Older Entries

Planet MySQL © 1995, 2015, Oracle Corporation and/or its affiliates   Legal Policies | Your Privacy Rights | Terms of Use

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.