Bug#377857: occasional SIGSEGV in exim4 under heavy load

[Chris Lightfoot]

On Fri, Jul 14, 2006 at 09:02:40PM +0200, Marc Haber wrote:
> On Tue, Jul 11, 2006 at 06:19:38PM +0100, Chris Lightfoot wrote:
> > Under heavy SMTP load, we occasionally observe the exim4
> > daemon crashing (with the result that no further
> > connections can be accepted, obviously). We can reproduce
> > this here with the `postal' SMTP benchmark (package
> > postal) and the following command-line:
> > 
> >     postal -p 10 -c 10 -m 1 localhost users -
> 
> I cannot reproduce this, neither on sarge nor on sid. Changes to your
> setup: My tests were running in a chroot, and I aliased the account to
> ":blackhole:" which should be the same as /dev/null but does not
> require pipes to be allowed in the router.

ok, changing /dev/null for :blackhole: doesn't make any
difference here, so it's possible it's a difference in
some other aspect of the exim config.

That said, what sort of throughput figures is postal
giving? You may want to try with -c 1 instead of -c 10 to
see whether you can increase the process turnover rate
significantly.

-- 
Chris Lightfoot
mySociety