[development] Caching, caching, caching...

[Khalid B]

Gerhard,

One more note here, is that all this is MySQL centric. What about
PostgreSQL? Its caching is different, and optimizing for one type
of database will not apply. I think even Inno-DB (or the upcoming
SOLID) caching will be different than MyISAM.

I think two things can be explored further.

1. Revisit the file caching patch by Jeremy Andrews.

2. Look into object caches, like memcached, if the database is a bottleneck.