The LUN mapped for Nagios is utilizing huge IO

[wiproltdwiv]

The LUN mapped for Nagios is utilizing huge IO

LUN Total OP/s Application running
/vol/EMSAPM2/emsapmdata 745 Nagios

recently added around 1600 parameters in Nagios server, is this the reason for IO utilization. Please help & suggest.

[ssax]

It depends on what type of parameters you are using that would determine the amount of IO used.

Have you added a RAMDisk? You can also read more about the the Key Files That Affect Disk I\O in the following document:

http://assets.nagios.com/downloads/nagi ... giosXI.pdf

For good measure I'll link you to the maximizing performance doc:

http://assets.nagios.com/downloads/nagi ... ios-XI.pdf

[wiproltdwiv]

What are the parameters that can take more efficency or more IO,

[wiproltdwiv]

I mean how should I check which parameter is consuming more IO, so that we can find the culprit & remove...

[Box293]

iotop should help with this

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yum -y install iotop

then run

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iotop

[wiproltdwiv]

Is the files creating in /usr/local/nagios/var/spool/xipde are neccessary for any work..because it is around 90G in our nagios server..pls suggest can we remove it..

[wiproltdwiv]

Can we delete these files...Will it affect ???

[ssax]

That directory contains all the performance data, if you delete it you will lose your past performance data.

90G is a lot of space, should really be around 1-2G

If you don't care about the performance data you can delete the files but you should still modify the file below and change your settings.

Change /usr/local/nagios/etc/pnp/npcd.cfg
From

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load_threshold = 10.0

To: *** A general rule for load_threshold would be the number of cores your server has times 10.

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load_threshold = 20.0

Then run:

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service npcd restart

If that doesn't clean up that directory you may have to delete the files and then restart the npcd service.

[wiproltdwiv]

/usr/local/nagios/var/spool/xidpe/ This file is 15 G size, I am not even able to tar or zip it.showing errors like :
tar: /usr/local/nagios/var/spool/xidpe/ziLwfhAq: File removed before we read it
tar: /usr/local/nagios/var/spool/xidpe: file changed as we read it

Requesting you to please help us with any suggestion

[abrist]

You will most likely have to remove the files in the xidpe folder as the spool has gotten too large to be stat()ed/parsed. How many files are in there:

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ls /usr/local/nagios/var/spool/xidpe/ | wc -l

You can remove the files with the following command, but you should be aware that you will have gaps in your graphs representing the time associated with each of these performance data files in xidpe:

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cd /usr/local/nagios/var/spool/xidpe/
find . -type f -delete