System gradually getting slower

[Nils Erik Svangård]

Hi!
Im running Amd64 with unstable for i386 with my own custom compiled kernel.
Usually I can run the computer for several months without rebooting,
but recently everything has started going slower, the only way I have
found that fixes it is to reboot the system.
Does anyone know whats going on? Is there any diagnosticsprogram I can
run to check the problem?
/nisse