In query examinations it is often interesting which columns query needs to access to provide result set as it gives you ideas if you can use covering indexes to speed things up or even cache some data by denormalizing tables. So far it has to be done manually – look at SELECT clause, […]Read more
Running RPM based or other packaged MySQL Binary you may have a problem if you would like to rebuild binary for some reason – change some build settings, apply some third party patches or simply try latest snapshot (This time I was both applying patches for Innodb scalability and Vadim’s patches to get […]Read more
I was pretty busy last month with project which will be annonced very soon (I hope), but I can’t miss bug fix
of my favorite bug 15815. I wrote about this problem before and also investigated in my presentation.
Finally bug fix was pushed into 5.0-bk tree and now I have it in my hands.
Let me […]
As you probably know PHP “mysql” extension supported persistent connections but they were disabled in new “mysqli” extension, which is probably one of the reasons some people delay migration to this extension.
The reason behind using persistent connections is of course reducing number of connects which are rather expensive, even though they are […]