CARP performance tuning question.
pluknet at gmail.com
Wed Nov 5 05:40:34 PST 2008
AT work we use device carp(4) under high load:
The problem is that the server experiences a bad interactivity (from
70k states and very bad from 120-150k)
i.e. when a network workload (and interrupts count) begin to increase.
CPU states: 0.0% user, 0.0% nice, 0.4% system, 76.3% interrupt, 23.3% idle
PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND
13 root 1 -44 -163 0K 8K WAIT 407:43 57.86% swi1: net
ATM pfctl -s info shows such numbers:
State Table Total Rate
current entries 153972
searches 6052078938 4800.8/s
inserts 120373545 95.5/s
removals 120219573 95.4/s
It works currently under UP, but could be rebuilt to work under SMP
(Xeon 5130) if that helps.
Can someone give hints to decrease interrupt count and to help with
the server stability at all?
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