Nagios Core Check_Load Concern

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vnoc
Posts: 54
Joined: Thu Jul 27, 2017 1:51 am

Nagios Core Check_Load Concern

Post by vnoc »

Hi Team,

Can you explain me what exactly the Check_load will monitor and also confirm does this monitor CPU Utilization, Memory Utilization & IO wait.
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mcapra
Posts: 3739
Joined: Thu May 05, 2016 3:54 pm

Re: Nagios Core Check_Load Concern

Post by mcapra »

Here is the man page for check_load:
https://nagios-plugins.org/doc/man/check_load.html

It leverages the glibc extensions, specifically the getloadavg function, under gnulib:
https://www.gnu.org/software/libc/manua ... urces.html
This function gets the 1, 5 and 15 minute load averages of the system. The values are placed in loadavg. getloadavg will place at most nelem elements into the array but never more than three elements. The return value is the number of elements written to loadavg, or -1 on error.
TL;DR it's all in terms of CPU usage specifically. Here's an article that explains this a bit better:
https://www.howtogeek.com/194642/unders ... e-systems/
Former Nagios employee
https://www.mcapra.com/
bolson

Re: Nagios Core Check_Load Concern

Post by bolson »

Thank you mcapra!

vnoc, may we close this topic?
vnoc
Posts: 54
Joined: Thu Jul 27, 2017 1:51 am

Re: Nagios Core Check_Load Concern

Post by vnoc »

still i am not haveing a clarity that check_load checks only the cpu load or it checks IO waits disk utilization memory utilization and cpu utilization
bolson

Re: Nagios Core Check_Load Concern

Post by bolson »

Hello vnoc,

The check_load plugin checks only the CPU load. May we close this topic?
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