Performance problems in RT

Hi,

We run:

rt.3.0.10

Apache 2.0.48

Fastcgi 2.4.2

Mysql

We have some performance problems and was told to start masons internal
caching. Is there someone who has done this? And how can we turn on this
caching?

I hope you can get me some hints because I have no experience with using
the mason handler.

Hilde Therese