My server during peak hour can have about 300+- concurrent users spreading through different sites, so I am just wondering if I should modify following values in apache httpd.conf to increase the work load apache could accept?!

MaxKeepAliveRequests 100 -> to say, 999 or 0 for unlimited

MinSpareServers 5 -> what should I increase or decrease this to?
MaxSpareServers 10 -> and this?

MaxClients 150 -> 999?

any thing left out??

any comments appreciated! :D