> A general query cache is something that is fairly clean and which might
> help both with count(*) and other queries.
>
> Many databases has a lot of tables that are more or less stable where this
> would work fine. From what I have heard mysql has something like this and
> it works well. For tables that change a lot the the cached queries will
> almost always be invalid so one might want to let the user decide which
> tables should never be cached.
It works well because MySQL doesn't have MVCC...
Chris
