I'm on a Linode 512. The SMF forum has like 4-5k unique visitors a month, around 10-50 on at a time.

In apache, mpm_prefork is set to:
StartServers 1
MinSpareServers 3
MaxSpareServers 5
MaxClients 20
MaxRequestsPerChild 0

mpm_worker is set to:
StartServers 2
MaxClients 350
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 25
MaxRequestsPerChild 0

Are those good? Also, what settings should I modify in mysql?

which one are you using? mpm_prefork or mpm_worker? Only one of those settings will be in use at any time.

apache2 -v | grep MPM will tell you

Have you considered using nginx? With the right configuration you will be able to get a lot more out of your box performance wise.

_________________
W: niden.net
T: nikosdimopoulos