is there any way to upgrade the MySQL version used by Zimbra? We're having issues in the stability of our setup due to a MySQL-bug (MySQL Bugs: #20358: InnoDB hang on the adaptive hash index latch in btr0sea.c). I already filed a bug in Zimbra for this (Bug 32566 – MySQL 5.0.51a deadlocks on certain queries), but it seems that this will not be a quick-fix, and I need to do something to make my setup reliable again (so my customers stop complaining).
The only solution I see is replacing the MySQL with a newer version, but I assume this would break a lot, and make upgrades nearly impossible.
Any suggestions anyone?