<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<META NAME="Generator" CONTENT="MS Exchange Server version 08.02.0176.000">
<TITLE>High latency when 15% hosts offline</TITLE>
</HEAD>
<BODY>
<!-- Converted from text/rtf format -->
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Hi</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">I</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri">m running Nagios Core 3.2.1</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Currently we have a network switch down, meaning all hosts beneath that switch</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> are unreachable</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri">, 42 in number</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> (from a total of</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> 336)</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"></FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">.</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> In</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">Nagios</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"></FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">I</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> have</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">the</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> switch set up as the parent.</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> The switch</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">I</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> have set to be in</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">scheduled</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> downtime until we get a replacement, to prevent notifications being sent out.</FONT></SPAN><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">I</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> am finding that the service</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">check</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> latency is enormous and the scheduling queue is slipping behind in time. For example, it is now</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">11:04am and the next check at the top of the</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">scheduling</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> queue should have run at 9:52am.</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Here are the service metrics from the</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">P</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri">erf. Info page;</FONT></SPAN><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Check Execution Time: </FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">0.00 sec</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">30.19 sec</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">2.170 sec</FONT></SPAN><SPAN LANG="en-gb"> </SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Check Latency:</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">0.00 sec</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">13612.54 sec</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">7025.395 sec</FONT></SPAN><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Percent State Change:</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">0.00%</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">17.37%</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">0.50%</FONT></SPAN><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Are there any</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">ways I can reduce this latency, other than disabling active checks on all the</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">unreachable</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> hosts?</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">Or any</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">‘</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri">parallel</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri">’</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> check tweaks</FONT></SPAN><SPAN LANG="en-gb"> <FONT FACE="Calibri">I</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> may have</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri"> mis-configured?</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">I’</FONT></SPAN><SPAN LANG="en-gb"><FONT FACE="Calibri">m happy to provide any other info</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Thanks for any help</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri">Kristian</FONT></SPAN></P>
<P DIR=LTR><SPAN LANG="en-gb"><FONT FACE="Calibri"></FONT></SPAN><SPAN LANG="en-gb"> </SPAN></P>
</BODY>
</HTML>