Bug#377857: occasional SIGSEGV in exim4 under heavy load

[Marc Haber]

tags #377587 unreproducible
thanks

On Sat, Jul 15, 2006 at 01:26:38PM +0100, Chris Lightfoot wrote:
> On Fri, Jul 14, 2006 at 09:46:39PM +0200, Marc Haber wrote:
> > On Fri, Jul 14, 2006 at 08:23:12PM +0100, Chris Lightfoot wrote:
> > > 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.
> > 
> > dc_eximconfig_configtype='local'
> > dc_other_hostnames='hostname.example'
> > dc_local_interfaces='127.0.0.1'
> > dc_readhost=''
> > dc_relay_domains=''
> > dc_minimaldns='false'
> > dc_relay_nets=''
> > dc_smarthost=''
> > CFILEMODE='644'
> > dc_use_split_config='false'
> > dc_hide_mailname=''
> > dc_mailname_in_oh='true'
> > 
> > no other changes to the config.
> > 
> > > That said, what sort of throughput figures is postal
> > > giving?
> > 
> > Like 5000 messages per minute.
> > 
> > > You may want to try with -c 1 instead of -c 10 to
> > > see whether you can increase the process turnover rate
> > > significantly.
> > 
> > No significant change.
> > 
> > And it doesn't crash.
> 
> ok, I've just tried your config and it still crashes here,
> in the same place.

Bad :-(   This makes the bug unreproducible :-(

> No throughput figures (it crashed
> within the first minute on the couple of occasions I've
> tried) but on the previous config (with logging to the
> tmpfs partition) it was doing 12--14,000 messages/minute.
> Logging to disk, as in the default config, is likely to be
> quite a bit slower on this hardware.

Logging to a tmpfs didn't influence throughput here. Additionally,
having exim query a local caching resolver, the throughput didn't
change as well.

Greetings
Marc

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