What is the best SNMP OID for switch CPU utilisation?

[ajwhite0]

Hello,

What is the best SNMP OID for switch CPU utilisation?

I have these to choose from:

Thanks

[Flavio Miranda · Accepted solution]

@ajwhite0 

 "The cpmCPUTotal5minRev MIB object provides a more accurate view of the performance of the router over time than the MIB objects cpmCPUTotal1minRev and cpmCPUTotal5secRev . These MIB objects are not accurate because they look at CPU at one minute and five second intervals, respectively. These MIBs enable you to monitor the trends and plan the capacity of your network. The recommended baseline rising threshold for cpmCPUTotal5minRev  is 90 percent. Based on the platform, some routers that run at 90 percent, can exhibit performance degradation versus a high-end router, which can operate fine."

If you choose a very small time frame like 1 minute os seconds, you will be subjected of smaller variation and spikes caused by any event.

5 Minutos will filter some of those variation and will show you a more reliable information.

[ajwhite0]

cpmCPUTotal5minRev sounds like the one thanks!

[marce1000]

                      - This is not a matter of 'best' ; the names point to specific purposes ,

 M.

[Mancunian]

Choice depends on how often you want to monitor the CPU usage and the desired level of detail.

cpmCPUTotal5min: CPU utilization averaged over a 5-minute period, and it is the most commonly used for monitoring trends, as it smoothens out short spikes and shows a consistent utilization.

cpmCPUTotal5sec: CPU utilization over the last 5 seconds, you can use this if you need near real-time monitoring, but it may show volatile spikes in CPU usage.

cpmCPUTotal1min: CPU utilization over 1 minute, It strikes a balance between real-time data 5 seconds and long-term smoothing 5 minutes.

If you are looking for overall performance monitoring, the cpmCPUTotal5min is the best choice. It avoids misleading spikes that may appear in shorter intervals while still being responsive enough for performance analysis. But, if you need real-time data, go for cpmCPUTotal5sec.

[ajwhite0]

cpmCPUTotal5min it is then, thank you.