Varnish crashing excessivly

Tollef Fog Heen tfheen at
Fri Sep 12 13:45:23 CEST 2008

]] Erik Jansson 

| Our cache machine is a Dell Poweredge 2950 X5355  @ 2.66GHz with about 
| 16GB's of RAM with 5 76GB SAS-drives. We are running Ubuntu. The server 
| is serving images from the backend storage servers. The image sizes 
| varys from about 10k to 200k. At peak hours we have about 4000 requests 
| per second.

Which Ubuntu version are you using?


| Problem #2 is that varnish segfaults every now and then, sometimes many 
| times in a short period, but sometimes it runs for a couple of days 
| without problems. The only lead i have on this is
| [105474.200474] varnishd[24170]: segfault at 00000000000004a0 rip 
| 000000000041ced0 rsp 00002aef65046af8 error 4
| which i got from dmesg

We have fixed some bugs which were triggered in high-volume
environments; could you see if the problem goes away by updating to
current trunk?


| I am aware that this is probably not even close to all the information 
| you need, I need your help to collect more data about my problems. I 
| would really like to replace squid as soon as possible.

A backtrace from when it crashes would be useful; ulimit -c unlimited
should help with that, but note that the core file will be quite large,
so you might want to try updating first.

Oh, and please file a ticket about this so we're tracking this
properly. :-)

Tollef Fog Heen 
Redpill Linpro -- Changing the game!
t: +47 21 54 41 73

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