Eli Stair schrieb:
I had a suspicion that the cause might be large numbers of hosts that
go down. Until I get around to them the host checks obviously
continue... perhaps that's what's causing the general slowdown in all
of nagios.
Think about why a host check is executed... not only when a host is
really down...
Every time when a service check returns a non-OK state nagios will do a
host check.
On the other side might it be, that you are using dist-monitoring with nsca?
We have had very high latency (600seconds up to somthing around three
hours) when using nsca on each single service_check result.
Just my 2 cents
Makes me wish again host checks were parallelized.
/eli
Ludwig Pummer wrote:
I had large latencies caused by (1) hosts being down and (2) a host
check that took way too long. Nagios will suspend all service checks
while it performs a host check. In my case, the Nagios config I
inherited made 10 attempts at 30 seconds each attempt before
declaring a host to be down, so if one host went down, the host check
took 300 seconds. I typically have 15 hosts down out of 475. I
changed my host checks to 3 attempts at 6 seconds each, and latencies
went way down.
--
Ludwig Pummer
System Administrator
Copart Auto Auctions
------------------------------------------------------------------------
*From:* [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] *On Behalf Of
*Blake Krone
*Sent:* Monday, December 05, 2005 2:08 PM
*To:* Nagios Users
*Subject:* [Nagios-users] Huge Service Latencies
Service Check Execution Time: 0.10 / 10.04 / 2.175 sec
Service Check Latency: 21.25 / 483.37 / 224.970 sec
Host Check Execution Time: 0.06 / 10.70 / 4.307 sec
Host Check Latency: 0.00 / 529.15 / 5.137 sec
# Active Host / Service Checks: 103 / 236
# Passive Host / Service Checks: 0 / 1
Machine is a P3 733mhz with 128mb ram running 2.6.11-gentoo-r3
kernel and Nagios 2.03b
Any ideas as to why it has such huge latencies?
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