On Thu, Apr 26, 2001 at 01:56:56PM -0700, Justin Erenkrantz wrote:
> Greg Ames wrote:
> > It would be great if somebody could beat it up on a live
> > non-FreeBSD system, and tell us what happens.
>
> Looks fine here with Linux 2.2. Takes a few seconds (5 or so) with
> threaded MPM to shut down completely. This is after hitting it with
> about 5000 static requests via ab.
>
> Still only getting one active request at a time with mod_mbox. Hmph.
Spoke too soon...
Linux 2.2 - threaded MPM - throw about 2000 requests at it and it runs
out of file descriptors (didn't pay attention to ab's error messages).
It seems to happen around the 1750-1950 request plateau.
I set ulimit -n to be 1024 - can't set it any higher in userspace -
/proc/sys/fs/file-max is 8192. The result is that no new connections
can be created.
httpd.conf:
<IfModule threaded.c>
StartServers 2
MaxClients 8
MinSpareThreads 50
MaxSpareThreads 128
ThreadsPerChild 64
MaxRequestsPerChild 0
</IfModule>
Triggered by:
ab -k -c 100 -n 2000 http://target.machine.yours/index.html
Are we not closing our fds after we are done with them? This is just
hitting the static pages - nothing to do with mod_mbox or anything
else. Guessing this would be restricted to mod_core.
Can anyone else duplicate this? Or, is this a symptom of something
else I need to tweak with Linux? This couldn't be triggered by
something bogus in ab, could it?
I have to go now. Will be back later tonight to dig around mod_core
if no one has any ideas. It is a pain to debug under Linux with
gdb because of sigsuspend usage... -- justin
