High Memory/CPU usage

[GoogleCodeExporter]

My server has 5 instances of apache with mod_SPDY. He receives a peak of about 
17,000 requests, divided between 5 instances. This server contains only the 
instances of apache installed and when the number of users increases, the 
server uses all memory, swap and CPU, locking and being necessary either 
restart the server. 
Server Configuration: 16GB memory and 4 CPUs 
apache-2.2.25-1.x86_64.rpm-SPDY 
It's my first implementation of SPDY and would like to know how can I prevent 
HTTPD processes using any resource and lock the server.

Original issue reported on code.google.com by [email protected] on 6 Mar 2014 at 1:31