You need to increase ServerLimit and MaxClients to 600 for example. MaxClients is limited by ServerLimit. In turn ServerLimit is limited by the physical resources you have at your disposal. Considering you have a highly thread-capable server with plentiful memory 600 should be a safe limit, provided you only load the modules that you need. Also you could consider using the worker MPM, which will require much fewer child processes. Danny ________________________________ From: Vikrama Sanjeeva <viki.sanjeeva@xxxxxxxxx> [mailto:Vikrama Sanjeeva <viki.sanjeeva@xxxxxxxxx>] Sent: 25 January 2010 13:57 To: users@xxxxxxxxxxxxxxxx Subject: Help me in setting up MaxClients Hello All, This is regarding production servers. Recently Apache server hit MaxClient settings; resulting in crash of sites. However, sites was back to normal after restarting Apache. I read about MaxClient settings and increase it from 200 to 250 (as I read somewhere that 256 is a limit). Since then sites are working fine. But still I see average concurrent request on Apache is 180-200 which sometime goes to 220 as well. This is threatening, as we are planning to put more sites live on same Apache. Therefore, I am considering to increase MaxClient in order to handle "at-least" 600 concurrent request. I will be grateful if somebody can assist me in setting the right values for ServerLimit, MaxClient, MinSpareServers and MaxSpareServers. Also, what maximum values I can have for MaxClients (want to know max concurrent users Apache can handle.) Machine Specs are: Manufacturer: Sun Model: T5240 Operating System: Solaris 10 10/08 s10s_u6wos_07b SPARC CPU(s): 2x UltraSPARC-T2+ @1415 MHz; 128 Cores 128 Threads Memory: 32544 MB Apache Version: Server version: Apache/2.2.11 (Unix) Server built: Jan 5 2009 22:19:26 Existing MaxClient Settings: <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 MaxClients 250 MaxRequestsPerChild 0 </IfModule> Note: I am not good in Solaris/*.nix commands :( Bye, Viki. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ ______________________________________________________________________ This e-mail and any attached files are intended for the named addressee only. It contains information, which may be confidential and legally privileged and also protected by copyright. Unless you are the named addressee (or authorised to receive for the addressee) you may not copy or use it, or disclose it to anyone else. If you received it in error please notify the sender immediately and then delete it from your system. Please be advised that the views and opinions expressed in this e-mail may not reflect the views and opinions of Associated Newspapers Limited or any of its subsidiary companies. We make every effort to keep our network free from viruses. However, you do need to check this e-mail and any attachments to it for viruses as we can take no responsibility for any computer virus which may be transferred by way of this e-mail. Use of this or any other e-mail facility signifies consent to any interception we might lawfully carry out to prevent abuse of these faciliti es. Associated Newspapers Ltd. Registered Office: Northcliffe House, 2 Derry St, Kensington, London, W8 5TT. Registered No 84121 England.
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