MySQL 5.5.39 was recently released (it is the latest MySQL 5.5, is GA), and is available for download here:
This release, similar to the last 5.5 release, is mostly uneventful.
There were two “Functionality Added or Changed” and 24 bugs fixed.
The “Functionality Added or Changed” changes are:
- CMake support was updated to handle CMake version 3.
- The timed_mutexes system variable has no effect and is deprecated.
Out of the 24 bugs, most seemed rather minor or obscure, but here are the ones I think are worth noting (crashing, security, wrong results, deadlock):
- InnoDB: Opening a parent table that has thousands of child tables could result in a long semaphore wait condition.