Upgrading from MySQL 5.5 to MySQL 5.6 is a fairly straightforward process. However, the move to version 5.6 does bring with it some new varaibles with which to work.
One of the recent innovations (pioneered by Percona in Percona Server 5.5 if I recall correctly) is the ability to "dump" the innodb buffer pool***. This can be done any time MySQL is running and can be configured to be executed during MySQL shutdown. One reason to do this is to have a server "pre-warmed" when you perform a server restart. Why this is important is that during server operation the innodb buffer pool will fill up. Typically the server will operate much better when this buffer pool is full instead of being empty or paritally full because the return of data from the buffer pool is much faster than returning data from disk.
There are four important variables with each[Read more...]