<div class="gmail_quote">On Fri, Feb 15, 2013 at 11:04 AM, Marco Borsani <<a href="mailto:m.borsani@it.net" target="_blank">m.borsani@it.net</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> <div link="blue" vlink="purple" lang="IT"><div>Hi all I have too cluster centos , both with Nagios 3.3.1 , both with 4Gb of ram. Nagios “A” , has 400 servers and 3300 services configured. Its memory usage is about 88% Nagios “B” , has 300 servers and 1900 services configured. Its memory usage is about 95% Where/How can I investigate to understand why this big difference (less checks , more memory usage) ? </div></div></blockquote><div> </div></div>Is the embeeded perl enabled? (the 1.9K services can maybe call more perl than the other). Jean