Red Hat Bugzilla – Bug 73433
apache/httpd.h HARD_SERVER_LIMIT too small
Last modified: 2007-04-18 12:46:20 EDT
From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0; H010818; T312461; Hewlett-Packard IE5.5-SP2) Description of problem: The Apache config directive MaxClients is limited by a hard-compiled constant in httpd.h called HARD_SERVER_LIMIT. For Linux, this limit is set to 256, which is woefully inadequate for today's systems that may need to have as many as 2048 concurrent clients. Please up the hard limit in your base distro to 2048. If customers do not want that many servers running (say because they're on an older system), then they can manually lower the MaxClients config variable to whatever they want, but there's nothing short of a recompile that we can do to go higher. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: Hand-edit the apache httpd.conf file to set MaxClients higher than 256. Start the server. Observe that the server reports that it is automatically resetting the value back to the hard-compiled limit. Actual Results: The server reported that it was automatically resetting the limit back down to the hard-compiled limit of 256. Expected Results: It would be nice to see the server able to set the MaxClients limit as high as 2048. Additional info: This can be worked around by recompiling the apache httpd binary, but this is not an option for everyone (strict software appropriation standards, no development platform, etc.)
I'd really like this for 7.2 and later versions of RedHat, also. Thanks!
Refiling against Apache 2.0 package.
In Apache 2.0 this limit can be changed via the httpd.conf's ServerLimit configuration value. For example: ServerLimit 2048 MaxClients 2048 Working for me in Apache 2 bundled with Red Hat 8.0.
As noted, this works in 2.0. It's hard (if not impossible) to fix for 1.3 without changing the binary module interface.