1. I have to rail totally against this. The more you lower MaxRequestsPerChild, the more often apache is killing and recreating a child process. At numbers as low as 2000 or lower, you're starting to defeat the whole purpose of using the worker mpm.
>=50% of apache's time is going to be spent managing child processes on a high traffic site. MaxRequestsPerChild should either be 0 or something very high. IF your process memory usage gets higher and higher, then you have a memory leak somewhere. 2. Don't use ThreadLimit, stick with ThreadsPerChild 3. You MaxClients doesn't sync up to your other numbers. MaxClients is going to be ServerLimit x ThreadsPerChild. So for you, 1500. If you want to serve 1500 concurrent reqs, then set MaxClients to match this at 1500. If you want 500, then change ServerLimit,StartServers and ThreadsPerChild so the math is right. For instance, ServerLimit 10, StartServers 5, ThreadsPerChild 50 will be you a MaxClients of 500. If you give us your server parameters (cpu, memory, modules loaded, apache rss usage, types of files served), we'd be able to better recommend numbers for what your server can support. -Tony --------------------------- Manager, IT Operations Format Dynamics, Inc. 303-573-1800x27 abia...@formatdynamics.com <mailto:abia...@formatdynamics.com> http://www.formatdynamics.com <http://www.formatdynamics.com/> From: Tadeu Alves [mailto:tadeu...@gmail.com] Sent: Friday, March 13, 2009 8:45 AM To: users@httpd.apache.org Subject: Re: [us...@httpd] Apache Tunning nice one. Getting on this hook, in my server we run moodle i dunno if you guys know about it and a very high hits/second i wan't to know if going down about MaxRequestsPerChild 500 will be good to performance and any idea about changing my server variables to make it support more concurrent connections ######################################## <IfModule worker.c> ServerLimit 30 ThreadLimit 70 StartServers 20 MaxClients 500 MinSpareThreads 10 MaxSpareThreads 15 ThreadsPerChild 50 MaxRequestsPerChild 2000 MaxMemFree 5000 #ReceiveBufferSize 714400 (not using anymore) ################################# On Fri, Mar 13, 2009 at 5:41 AM, Gaurav Khambhala <gau...@deeproot.co.in> wrote: Hi Kulbir, Gaurav wrote: Tadeu Alves wrote: i thibk that you can down the variable MaxRequestsPerChild 20000 to 2000 it's too much and if the child process keeps the request well i't grows bigger and bigger in memory Even 2000 is too much. Various high load,high traffic servers also don't have this much high value. Found this: http://rimuhosting.com/howto/memory.jsp may be useful to you. -- Cheers, Gaurav Khambhala i-hack-at-DeepRoot Linux Getting GNU/Linux to work for you. Faster. Better. Today. Every way. http://www.deeproot.in <http://www.deeproot.in/> , +91 80 4089 0000 --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org " from the digest: users-digest-unsubscr...@httpd.apache.org For additional commands, e-mail: users-h...@httpd.apache.org
