Hi All, We are setting up nagios to monitor our infrastructure, and we ran into a few problems. Most of them I"ve been able to solve, thanks to reading the mailinglist. But the latest problem is a persistent one. I'm running nagios on Suse Enterprise server 9, with kernel 2.6.5 on a dual 2.4 ghz intel Xeon server with hyperthreading enabled, the system has 2GB ram. We recompiled the kernel with SMP-support, en it detects 4 cpu's.. In nagios we defined 405 servers, and we do 6855 active checks, and 17 passive checks. And we have an extremely bad performance. At the tactical overview I see the following information: check latency: 4468.402 sec. It takes nagios about 1,5 hour to see a status change. Needless to say that this is not acceptable. Anyway I am looking for some hints, does anybode have an idea on what causes this behavior? Thanks in advance!! Marino