On-demand host checks and performance issues..

[Thomas Guyot-Sionnest]

Hi list,

While building a Nagios server I noted that as soon as I have a few hosts
going down, Nagios starts lagging behind and missing some checks. Even with
the check timeout set to 1 second I still get some problems. My current
workaround is to disable active checks on hosts that are down and this could
be done automatically with a service check and event handler.

Part of the problem seems to be caused by the fact that Nagios check the
host on every service failure (and recovery?). I think it wouldn't be hard
to add a max_check_frequency parameter for hosts so that they wouldn't be
check more often than a defined interval.

What do you think about this idea? It could solve most performance problems
related with on-demand host checks. Is there any change I could see this at
least for Nagios 3.0 (AFAIK parallelizing is only done on scheduled hosts
checks in 3.0)... Even better would be using multiple threads for  reaping
service check but I have no idea if that's technically possible and/or how
hard it would be...

Thanks,

Thomas
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/x-pkcs7-signature
Size: 3076 bytes
Desc: not available
URL: <https://www.monitoring-lists.org/archive/developers/attachments/20070305/ff519f35/attachment.bin>
-------------- next part --------------
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
-------------- next part --------------
_______________________________________________
Nagios-devel mailing list
Nagios-devel at lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/nagios-devel