ApacheToday: Improving mod_perl Driven Site's Performance -- Part IV: Sharing MemoryJan 09, 2001, 15:36 (0 Talkback[s])
(Other stories by Stas Bekman)
"If your OS supports sharing of memory (and most sane systems do), you might save a lot of RAM by sharing it between child processes. This will allow you to run more processes and hopefully better satisfy the client, without investing extra money into buying more memory."
"... The ideal is a point where your processes usually restart before too much memory becomes unshared. You should take some measurements to see if it makes a real difference, and to find the range of reasonable values. If you have success with this tuning the value of MaxRequestsPerChild will probably be peculiar to your situation and may change with changing circumstances."