>From the numbers you've provided it seems clear that, by default, Nagios sends at least one packet above and beyond those specified by the administrator.
Regards, --richard -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Byrns Sent: Wednesday, December 13, 2006 5:19 AM To: Nagios Users Subject: [Nagios-users] Packet loss reported by check_ping? Good morning, all. I've been tweaking our Nagios install over the years. I've often wondered exactly how the check_ping plugin reports its results. I used to leave this plugin at the default number of packets, which I believe is five. If and when we saw warnings on packet loss, it would usually give us numbers like 16%, 32%, or multiples like that. Why not multiples of 20%, given that it tried five packets? Now I'm worried, though. I recently changed our default ping commands to only use ONE ping packet. This was due to advice I found after a Google search, when I was seeing extremely high latencies on my host (and some service) checks. It certainly seemed to help, too, now my host latency is usually below one second. (Instead of the FIFTEEN MINUTES it was reporting before that) But I still see some reports of packet loss. Like, 50% is a common number I now see. HOW is it seeing anything but either 0% or 100% packet loss, if it uses only one packet per host check?? Also, along those lines... I recently moved from the 1.2 Nagios to the more recent 2.4-2.5 Nagios. Nagios 1.X seemed to only trigger a host check if a service check failed. Nagios 2.X seems to ALWAYS run host checks in addition to service checks. The fact that host checks are currently not run in parallel seems like this can really limit performance. Why did that behavior change? Will host checks be run in parallel for the 3.0 series, like I think I read once...? Thanks for any input! -- Jason Byrns Production Manager System Administrator http://www.MicroLnk.com/ 402-328-8600 ext. 653 ------------------------------------------------------------------------ - 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=DEVDE V _______________________________________________ Nagios-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null ------------------------------------------------------------------------- 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 _______________________________________________ Nagios-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
