MySQL
My presentation went well, I had a packed room, no standing room either. It is quite interesting that in spite of the fact that there have been a few tuning presentations already, there’s still interest in more. A quick question revealed the room was quite evenly split between DBAs and Developers..
Here you go — slides of the presentation. I will probably blog on the presentation and any interesting questions I got, but that will have to wait till after the conference.
The keynotes started with MÃ¥rten Mickos, the CEO of MySQL AB giving us a “State of MySQL” address. Keeping all the people together in a company where 70% of the employees work from home and are distributed across hundreds of cities across the world is no easy task, and I have a lot of respect for him.
I got tired of going all over the place to get information about mysqld variables, so I decided to make a summary of most of them (for version 5.0.27 linux). (Due to lack of horizontal space, I had to make two tables — the second one containing a short description of the variable.) Corrections, additions, and amplifications are welcome. Enjoy!
Pythian will be at the MySQL Conference in Santa Clara, taking in all the material we can, processing it, and spewing out what I hope will be some useful blogs. Watch this space!
Here is the perl script referred to by mysql-memory-usage-profile.
I’m not going to try to post a comprehensive mysql tuning manual here. This post is about taking a snapshot profile of a mysql instance that will allow you to define what type of instance you are dealing with, and give you some idea about whether the current configurations are stable or not.
Those of you who, like we do here at Pythian, have the pleasure of supporting both MySQL and Oracle environments (among others) will definitely know who Tom Kyte is. In any event, reading his blog today I noticed that over the weekend he posted on an error message blurted out of a wordpress environment… something about how the “[MySQL server has gone away]“
Big insider news on James Governor’s blog. They are giving the bigwigs (Gartner, IDC, Forrester et alia) a run for their money in technology analysis. The news is this, MySQL has signed a million euro deal with…..
Just a small thought to share. Oracle doesn’t really comply to the rule 11 of Codd’s 12 rules. It does have database links and tables can be grouped in different locations (databases) but it’s not possible to distribute a table transparently across several locations. MySQL Cluster, on the other hand, distributes rows of a table over different data nodes using hash function on the primary key and it’s transparent to the client so it conforms to the Rule 11 as opposed to Oracle.
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