0 worker 1. 프로세스 계산 http://www.webhostingtalk.com/showthread.php?threadid=274463 max processes = maxclient / threadsperchild then apache2 => 150 / 25 = 6 processes max apache2 + mod_perl = > 140 / 10 = 14 processes max. 2. more http://www.apachefreaks.com/apache2/misc/perf-tuning.html 3. etc ServerLimit 256 (prefork) ServerLimit 16 (worker)