Requests suddenly slow / fine after restart
bm at turtle-entertainment.de
Fri Apr 18 12:19:50 CEST 2008
we are running 2 varnish proxies with version 1.1.2 on debian etch
amd64. They are balanced with LVS.
The commandline is as follows:
/usr/sbin/varnishd -P /var/run/varnishd.pid -a :80 -f
/etc/varnish/default.vcl -T 127.0.0.1:6082 -t 120 -w 1,3000,120 -s
The proxies cache 2 domains, which only serve static files (no cookies
in use). there are no special expire options set in varnish config. the
backend servers (lighttpd) set them.
Recently we had some problems with slow requests. Some static graphic
files suddenly took several seconds to load instead of the usual
milliseconds. After a restart of varnish everything was fine again and
the very same graphic was fast again.
Since then we restart the varnish processes every morning. But 2 days
ago we again had the "slow delivery" problem.
I have not seen any obvious reasons for that, but I have not yet looked
deeper into this issue.
Perhaps somebody experienced similar things and found a solution?
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