There is one bug, or “missing feature” in MySQL Optimizer which may give you hard time causing performance problems which may be hard to track down, it is using only part of the index when full index can be used or using shorter index while there is longer index available. The last item […]Read more
Found a great article about Linux IO Schedulers today which is quite interesting. It goes in details about schedulers and explains in which of workloads which of schedulers is best.
The interesting thing this article points out is – there are multiple versions of each of the schedulers, while name remains […]
Kevin Burton writes about making MySQL Replication Parallel. Many of us have been beaten by the fact MySQL Replication is single threaded so in reality it is only able to use only single CPU and single disk effectively which is getting worse and worse as computers are getting “wider” these […]Read more
We all know disk based temporary tables are bad and you should try to have implicit temporary tables created in memory where possible, do to the fact that you should increase tmp_table_size to appropriate value and avoid using blob/text columns which force table creation on the disk because MEMORY storage engine does not support […]Read more
It looks like it looks like there are going a lot of discussions about future of MySQL Community Binaries, see for example this post and Kaj’s clarifications.
Obviously now it grew to a lot of speculations and many comments are far from real story. It is also really interesting to watch […]