How to optimise memory consumption

[Martin Beck]

Hey,
we're running around 100 tests which work with the database (e.g. create the 
whole database for testing, etc.). Even if we don't use our session pooling 
and clean up all magmasessions on the client afterwards, the server image 
consumes around 250mb while it started with 30mb....

Any hints to keep memory consumption down?
Running on WindowsXP with 2gb ram...

Regards, Martin