My Guidebook for Percona Live Amsterdam, 2015 - Part II
I see on Facebook that many of my friends are already on their way to Amsterdam for Percona Live Amsterdam 2015 that starts on Monday. As I explained, I am not going there, but I'd like to share my...
View ArticleFun with Bugs #37 - Bugs fixed in MySQL 5.6.27
MySQL 5.6.27 was released on September 30 formally. Source code is also available on GitHub, and I have it compiled (some users are less lucky) and running for a couple of days already. In this post...
View ArticleFun with Bugs #38 - Regression Bugs in MySQL 5.6
I often have to reply to questions related to upgrade from, say, MySQL 5.5.x to latest MySQL (or Percona) Server 5.6.x (5.6.27 for MySQL and 5.6.26 for Percona at the moment). One of them is sometimes...
View ArticleFun with Bugs #39 - Known Bugs in MySQL 5.7.9 GA
These days everybody is excited with recent announcement of MySQL 5.7.9 GA release. If you are not aware of this event yet (I've noted it from numerous posts even during my short vacation), wait for...
View ArticleFun with Bugs #40 - Bugs fixed in MySQL 5.7.10
MySQL 5.7.10, the first release after MySQL 5.7 GA announcement, appeared almost a week ago. It's interesting to check what bugs reported by MySQL Community were fixed in this version, hence this post...
View ArticleTricking the Optimizer, or How Checking Bug Reports Help to Solve Real Problems
I've got several useful habits over the years of work in MySQL Support. One of them is to start working on every problem with search for known MySQL bugs related to the problem at hand. I'd like to...
View ArticleNew Year Wishes for Providers of MySQL Support Services
Three years ago I shared my wishes for customers of Oracle's MySQL Support Services. There I basically asked them to report any problem that they suspect to be caused by the bug in MySQL software at...
View ArticleExploring Metadata Locks with gdb - First Steps
Metadata locks are used in MySQL since version 5.5.3 and are available in GA MySQL versions for 6 years already. Still they are far from clearly documented (even less their implementation is documented...
View ArticleExploring Metadata Locks with gdb - Double Checking the Initial Results
Some results in my initial post in this series led me to questions that I'll try to answer here. First of all, I noted that SELECT from a single table ended up with just one metadata lock request:(gdb)...
View ArticleExploring Metadata Locks with gdb - How One Can Use This?
In the previous post in this series I've concluded that metadata locks are acquired in "batches" and the function that implements this is called MDL_context::acquire_locks. Let's check quickly what it...
View Article"I'm Winston Wolf, I solve problems."
My (few) readers are probably somewhat tired of boring topics of metadata locks and gdb breakpoints that I discuss a lot this year, so for this weekend I decided to concentrate on something less...
View ArticleMySQL Support People - Those Who Were There First
I'd like to devote this long weekend post, the first in a new series, to my current and former colleagues who once worked or still work in a company that provided public MySQL Support service and had a...
View ArticleMySQL Support People - The Next Generation
My first post in this series caused quite an active discussion on Facebook. Readers correctly noted some mistakes in dates and missing names in the list. I've corrected some of the mistakes already and...
View ArticleMySQL Support People - Percona Support
I planned to continue this series of posts with the one about MySQL Support engineers who joined us in Oracle while I was working there, but based on recent events in my life I'd prefer to postpone it...
View ArticleFun with Bugs #41 - Bugs Fixed in MySQL 5.7.11
I've just noted that Oracle had released new versions of MySQL on February 5, 2016 formally, so while these days I am mostly thinking about the ways to do support properly, remembering my colleagues...
View ArticleMy First Steps in Exploring RocksDB
RocksDB and storage engine for MySQL based on it (so called "MyRocks") is widely discussed in my circles since August 2015 at least, so I decided to spend some time checking it. The easy way to get it...
View ArticleMySQL Support People - Those Who Joined Oracle to Work on MySQL
In this post I'd like to mention my colleagues from MySQL Support who had joined the team when Oracle already acquired Sun (and MySQL as a part of it), in 2010-2012. There were several really great...
View ArticleMySQL Support People - Directors, Managers and Coordinators
This post is devoted to my colleagues whose contribution to MySQL Support was really important, but mostly non-technical, that is, pure Directors, Managers and Coordinators, who hardly ever reported...
View ArticleOn Upgrades to Percona Server 5.7 GA: CentOS 6 Case
As you probably noted, Percona had finally released Percona Server 5.7 GA two days ago. I had not paid much attention to this branch during last month or so, but as it's GA now I decided to check...
View ArticleOn Upgrades to Percona Server 5.7 GA: Building from Git Source on Fedora
While writing my first post in this series I was bulding Percona Server 5.7 from Git sources on my wife's Fedora Core 23 box based on this manual page, for my collection of test instances. As I build...
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