I'm planning for webcenter portal site and the first task is sizing for hardware server. I have some document on Oracle public site that describe some information for Middleware server. But with WebTier I got nothing. Searching internet or this forum internal does not help.
My site will serve 200 concurrent user and I neet to sizing hardware for it ?
Can you give me some calculation for CPU, RAM resource ?
http://httpd.apache.org/docs/2.2/misc/perf-tuning.html - does not provide an exact answer, but gives you some idea as for what to watch for:
"The single biggest hardware issue affecting webserver performance is RAM. A webserver should never ever have to swap, as swapping increases the latency of each request beyond a point that users consider "fast enough". This causes users to hit stop and reload, further increasing the load. You can, and should, control the MaxClients setting so that your server does not spawn so many children it starts swapping. This procedure for doing this is simple: determine the size of your average Apache process, by looking at your process list via a tool such as top, and divide this into your total available memory, leaving some room for other processes."