Bug#377857: occasional SIGSEGV in exim4 under heavy load

[Chris Lightfoot]

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.  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.

-- 
Chris Lightfoot
mySociety