Nagios 3 scheduling test performance suggestions

[Thomas Guyot-Sionnest]

Hi list,

I think there is something missing in the PERFORMANCE SUGGESTIONS section of
the scheduling test (-s).

I used to update the status file as results comes in
(aggregate_status_updates=0). While building a big Nagios box I came to the
point where the service reaper thread was unable to reap fast enough to keep
latency low. Changing it to 5 seconds updates made an incredible difference
and now nagios hardly uses more than 10% CPU (I'd say 3-5 average). Startup
time was also drastically reduced.

While this box runs against Nagios 2.7 it's one of the configs I updated and
used for testing Nagios 3.0 and it never complained about status updates
aggregation.

Right now that box runs 869 active checks per minutes with very light load
:)

Thomas
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