Squid CPU usage in cachemgr.cgi

[Faheem <mailfaheem86@xxxxxxxxx>]

Hello,

I am trying to setup proper monitoring for our squid farm so that we will be alerted when there is a performance issue. I was looking at several statistics of squid available in cachemgr.cgi and see the below. I am a bit confused about the CPU usage stats shown in the cachemanager. If I go to 5 Minute Average of Counters in cachemanager it says "cpu_usage = 24.008036%"

What does this actually mean? Is this inclusive of all 4 cores in my server? We have CPU affinity set for squid process and it uses all 4 available cores. So does 100% mean that all 4 cores are fully being utilized? Which parameter would be the best one to look at to understand the real CPU usage.

Thanks,

meeh.

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