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Date: Tue, 15 Oct 2002 17:17:16 -0700
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Thread-Topic: Apache spawning child processes
Thread-Index: AcJ0qWJBQaAbzPh9Qu2x3p4qEcgHhQ==
From: "Srividhya Subramanian" <ssubramanian@oblix.com>
To: <users@httpd.apache.org>
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Subject: [users@httpd] Apache spawning child processes

We have 3 Apache 1.3.22 on RedHat Linux 7.2 with=20
The httpd.conf on each of the Apache servers have the following set.

StartServers 256
MinSpareServers 150
MaxSpareServers 300
MaxClients 256
MaxRequestsPerChild 0

We have a webserver plugin that communicates with a service on Solaris 8 =
for=20
authentication of users.=20
We are stress testing these systems  by using a testing tool called =
Application Center test from Microsoft by generating 500 concurrent =
login requests to each of the 3 webservers.

The tests run fine for sometime and after about 5 hours into the =
testing, we see a very large number of=20
the following  message "Child pid <pid> exit signal File size limit =
exceeded (25)" in the Apache error logs.=20
The message indicates child httpd processes are created and they exit =
due to some condition. This causes an increase in the number of threads =
in the daemon process till it eventually runs out of memory, causing it =
to core dump.=20

The question really is why does Apache create the high number of child =
processes even under this load?  The MaxRequestsPerChild set to 0 =
indicates that each child process should handle an unlimited number of =
requests, and there should be no need to create new apache processes. =20
Any help is appreciated.=20


Thanks,
Srividhya



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