Need to "calculate" optimum ulimit and fs.file-max values according to my own server needs. Please do not conflict with "how to set those limits in various Linux distros" questions.

I am asking:

  1. Is there any good guide to explain in detail, parameters used for ulimit? (> 2.6 series kernels)
  2. Is there any good guide to show fs.file-max usage metrics?

Actually there are some old reference i could find on the net: http://www.faqs.org/docs/securing/chap6sec72.html "something reasonable like 256 for every 4M of RAM we have: i.e. for a machine with 128 MB of RAM, set it to 8192 - 128/4=32 32*256=8192"

Any up to date reference is appreciated.

linux-kernel ulimit sysctl
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