• Apache Cannot Start Listening Already on 0.0.0.0


    A lot of times busy servers will have this issue and you cannot even force kill -9 the apachectl or httpd process: [root@apachebox stats]# ps aux|grep httpd root 1547 0.0 0.2 495452 32396 ? Ds Sep08 3:23 /usr/sbin/httpd root 3543 0.0 0.0 6448 724 pts/1 S+ 13:11&nbs........
  • check if Apache uses worker MPM or prefork MPM


    apachectl -l Compiled in modules: core.c prefork.c http_core.c mod_so.c It is "prefork.c" so in httpd.conf these settings are what you would use (if you use worker.c it won't have any impact): StartServers 2 MinSpareServers 5 MaxSpareServers&nb........
  • Apache MPM worker vs prefork


    find what MPM Apache is using, it will either be using "worker" or "prefork" apachectl -l Compiled in modules: core.c prefork.c http_core.c mod_so.c In my case it is "prefork" vi /etc/httpd/conf/httpd.conf Find the section that looks like this (by default one will normally exist for prefork and for worker, but in my case I only care a........
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