Huge Service Latencies

[Eli Stair]

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.

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:* nagios-users-admin at lists.sourceforge.net
>     [mailto:nagios-users-admin at lists.sourceforge.net] *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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