KeepAlive ON

<IfModule prefork.c>
StartServers       200
 MinSpareServers    5
 MaxSpareServers   20
ServerLimit     6500
 MaxClients       6000
 MaxRequestsPerChild  8000
</IfModule>

# worker MPM
# StartServers: initial number of server processes to start
# MaxClients: maximum number of simultaneous client connections
# MinSpareThreads: minimum number of worker threads which are kept spare
# MaxSpareThreads: maximum number of worker threads which are kept spare
# ThreadsPerChild: constant number of worker threads in each server process
# MaxRequestsPerChild: maximum number of requests a server process serves
<IfModule worker.c>
StartServers         400
 MaxClients         300
 MinSpareThreads     40
 MaxSpareThreads     150
ThreadsPerChild     50
 MaxRequestsPerChild  6000
</IfModule>