Varnish child killed

[Jean-Francois Laurens]

Hi there,

We¹re run varnish 2.1.5 for some week now and we still do not understand
some behavior regarding the shared memory activity.
We specified a ­sfile,/var/lib/varnish/varnish_storage.bin,50G in the
configuration but it¹s impossible to go higher than 25G used by varnish.
Please see the following cacti graph:



In addition I can see varnish doesn¹t seem to be able to handle more than 1
million objects:


When the child process get killed, the load of the system was very high:
Apr 20 21:46:44 server-01-39 varnishd[21087]: Child (5372) not responding to
CLI, killing it.
....
Apr 20 21:49:57 server-01-39 nrpe[18101]: Command completed with return code
2 and output: CRITICAL - load average: 159.00, 159.32,
77.02|load1=159.000;15.000;30.000;0; load5=159.320;10.000;25.000;0;
load15=77.020;5.000;20.000;0;
....
Apr 20 21:48:43 server-01-39 varnishd[21087]: Child (5372) not responding to
CLI, killing it.

All this makes me believe we have an issue with some kernel parameters that
do not allow varnish to handle as many objects as we configured it.

Would anybody have an advice for this problem ?

Jef

Jean-Francois Laurens
Ingénieur Système Unix
Resources et Développement
Secteur Backend
RTS - Radio Télévision Suisse
Quai Ernest-Ansermet 20
Case postale 234   
CH - 1211 Genève 8
T +41 (0)58 236 81 63


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