<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=us-ascii"> <META content="MSHTML 6.00.2900.2769" name=GENERATOR></HEAD> <BODY> <DIV dir=ltr align=left>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.</DIV> <DIV> </DIV> -- Ludwig Pummer System Administrator Copart Auto Auctions <DIV> </DIV> <BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left> <HR tabIndex=-1> From: nagios-users-admin@lists.sourceforge.net [mailto:nagios-users-admin@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 </DIV> <DIV></DIV>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? </BLOCKQUOTE></BODY></HTML>