apache mpm in Fedora Linux

Question

What is ideal configuration of apache - Prefork or Worker in Fedora Linux run on 8 core cpu with 60gb RAM for heavy traffic sites, Currently configured in httpd.conf -

<IfModule prefork.c>
    StartServers       8
    MinSpareServers    5
    MaxSpareServers   20
    ServerLimit      3500
    MaxClients       3500
    MaxRequestsPerChild  40000
</IfModule>

<IfModule worker.c>
  StartServers         4
  MaxClients         3500
  MinSpareThreads     25
  MaxSpareThreads     75 
  ThreadsPerChild     25
  MaxRequestsPerChild  40000
</IfModule>

Currently prefork is active.

Answer 1

Webservers do not scale well. Unless you have a very unusual workload you will get better throughput and capacity and much, much more resillience out of 2 servers with 2 cores and 8Gb of RAM than this box - but a lot depends on what your workload looks like and what else is running on the machine.

If you have a look around the site you'll see that questions about capacity planning are closed as being too broad, or moved to serverfault (where they are closed as duplicates to a question where there is no definitive answer).

Hence the answer is to measure what traffic your hardware can cope with and set the limits accordingly.