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Re: Nagios XI Performance Issues-RAM Utilization

Posted: Tue Sep 17, 2013 7:04 am
by anoop
HI Team,

Actually, we installed our Nagios XI Server, Offloaded MYSQL Server and Incident Manager servers on VMware ESXi boxes....


We are guessing the problem would be with "iowait" and also thinking the problem may be with storage IOPS... Can u pls suggest us whether i am right on that...


and i am attaching my free -m output for youre reference,...

Re: Nagios XI Performance Issues-RAM Utilization

Posted: Tue Sep 17, 2013 12:08 pm
by abrist
It looks like 10gb of the 12gb of memory in use are used by disk buffers. Essentially, this means that nagios is using 2gb or less of ram and the kernel is allocating 10gb to disk buffers. So no problem there.
anoop wrote:We are guessing the problem would be with "iowait" and also thinking the problem may be with storage IOPS... Can u pls suggest us whether i am right on that...
The top output you posted showed oi wait at 0%. You may want to run top for a while, checking the io wait for spikes . . .

Re: Nagios XI Performance Issues-RAM Utilization

Posted: Thu Sep 19, 2013 9:47 am
by anoop
HI Team,

I removed the RAM Cache by using

#sync
#echo 3 > /proc/sys/vm/drop_caches and my nagios server utilizing only 2GB of RAM...

.. Thanks.. now issue is resolved

Re: Nagios XI Performance Issues-RAM Utilization

Posted: Thu Sep 19, 2013 1:47 pm
by slansing
Closing as resolved.