Nagios Support Forum

Hello,

I have a problem with Nagios XI 2011R1.8
installed on CentOS 6.0
4 Gb of ram

for the moment only localhost is under monitoring.
I received, by mail, an alert about memory usage: only 300Mb free memory
the server has been restarted on thursday.
after a fresh reboot, the memory usage is 500Mb (3.5Gb free)

Can you help me
thanks?

I would guess that this is "caused" by your cached memory. What is the output of:
You can see how to clear cache from memory here:

http://www.linuxask.com/questions/how-t ... y-in-linux

thanks a lot
my problem is solved
I scheduled a script to release memory cache every day

Glad I could help!