Apache2 tuning?

[Omer Faruk Sen]

I have searched on google for a apache2 performance tuning document on 
FreeBSD but there is not much document and all of them repeat themselves. 

Is there any document for that. By the way is it suggest to compile and run 
apache2 on freebsd with ``worker MPM''. And especially is there anyone in 
this list that compile and run apache2 with linuxthreads? (Especially on a 
production server?) 

Thanks.