Boards can exhibit the same thing, but for very different reasons. It can be resource related, out of balance parameters in MySQL, or any number of things related to hard disk usage.
In this case, it has to do with the InnoDB log files growing in too large of chunks. I need to break them down into smaller chunks so updates are done more often, but with less impact to the boards performance.
Unfortunately, you cannot simply change those parameters on a live database. The safest way (most paranoid) to accomplish it is to dump the databases to another server, perform the changes, then reload the databases.
What takes so long is the transfer of all the databases (tours, wiki, bulletin board). In order to have an accurate roll back logs, you have to inject the data back into the databases. If I was less paranoid, I would just copy the files over, but that would lose the ability to do any rollbacks on any of the databases from that point back.
