How can I calculate the Load Average of my OPMS instance?

Document ID : KB000012326
Last Modified Date : 14/02/2018
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Introduction:

     The App Synthetic Monitor (ASM) On Premise Monitoring Station (OPMS) can be used to monitor applications internal to an environment's firewall. The resource's allocated to the OPMS can help determine how many checks can be run against a specific OPMS instance. 

Question:

     How can I calculate the Load Average of my OPMS instance? 

Answer:

     To calculate the Load Average on an OPMS, run the following command:

 

cat /proc/loadavg

 

...from your OPMS. For example:

 

root@<host>:~# cat /proc/loadavg

0.67 0.34 0.25 8/449 21412

 

The first three numbers of the output are 1-minute, 5-minute and 15-minute load average on the system. If the 1-minute load average exceeds 4.0, the OPMS will reject check requests with a 503 error, until the load average decreases again. Should these values consistently exceed 4.0, consider reducing the number of checks running on the OPMS instance. Note that there are some situations in which load average can remain below 4.0, and the OPMS can still report 503 errors. Please contact CA Support to investigate these instance further.

 

The final two values are less relevant to OPMS load. For completeness, the fourth field is a ratio number of currently executing kernel entities processes,threads to the total number of kernel entities that currently exist on the system. The fifth field is the PID of the process that was most recently created on the system.

Additional Information:

     For OPMS Sizing Information, see our documentation here: https://docops.ca.com/ca-asm/on-premise-monitoring-stations-opms/pre-installation-check-list. As always, contact CA Support for further questions.