Varnish crashing in production

[Andreas Røsdal]

On Thu, 10 May 2007, Ask Bjørn Hansen wrote:
> On May 10, 2007, at 7:31 PM, Barry Abrahamson wrote:
>
>> We are currently testing Varnish as a reverse proxy to serve images.  We 
>> are running into problems where the varnishd child (and sometimes parent), 
>> will die unexpectedly.
>
> FWIW I am seeing something similar.  I haven't seen anything in the syslog or 
> tried running varnishlog for long enough to catch it happening (which I why I 
> didn't post).  In this installation (on RHEL4) increasing the cache size did 
> seem to help on the frequency.
>
> It never happens when it's idle-ish (<100-150 rps) but in the busy hours 
> (2-500rps) it happens frequently.   In the cache hit ratio (I love munin!) 
> you can see that pretty clearly - stable or slowly increasing average ratio 
> during the off-peak hours - when it's busy it drops every time there's a 
> crash...
>
> 	http://tmp.askask.com/2007/05/varnish_cachehitratio-day.png

Interesting..  How did you setup rrdtool to graph the hit ratio?


  - Andreas R.