When to run the garbage collector

[Robert van Herk]

Hello,

I noticed that it is possible to run the garbage collector explicitely...

Currently, I am writing a stateful webserver, that once in a while (e.g. 
every 30 minutes) can discard a lot of memory (because every 30 minutes 
sessions time out and their state can be thrown away).

Would it be wise to call the garbage collector explicitely, directly 
after this cleanup is done?

Regards,

Robert