this my configuration of httpd.conf,but it's easy to hit Resource Capacity 100%,and stop work.please tell me the best configuration,
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#
Timeout 120

#
KeepAlive Off

#
MaxKeepAliveRequests 100

#
KeepAliveTimeout 15

##
## Server-Pool Size Regulation (MPM specific)
##

<IfModule prefork.c>
ServerLimit       400
StartServers       10
MinSpareServers    10
MaxSpareServers    15
MaxClients        200
MaxRequestsPerChild  10000
</IfModule>


<IfModule worker.c>
StartServers         3
MaxClients          2000
ServerLimit         25 
MinSpareThreads      50
MaxSpareThreads      200
ThreadsPerChild     100
MaxRequestsPerChild  0
</IfModule>