Re: Squid CPU usage in cachemgr.cgi

Yuri <yvoinov@xxxxxxxxx> · Tue, 6 Sep 2016 18:08:52 +0600



    How I know something. In the light of dozens of different
      operating systems. Check the source code, they are also open. Even
      the top is not too reliably shows the load across multiple cores.
      By the way, SQUID, except in very specific configurations, running
      on a single core.

    
    06.09.2016 18:04, Faheem пишет:

    
      Thanks for that. But do you know the CPU usage
        shown in the cache manager is 24% of the total 4 CPU cores? If
        it says 100% does that mean that all 4 cores are fully utilized?

        
        On Tue, Sep 6, 2016 at 4:05 PM, Yuri <yvoinov@xxxxxxxxx>
          wrote:

          
              http://wiki.squid-cache.org/KnowledgeBase/PerformanceAnalysis
              http://wiki.squid-cache.org/SquidFaq/SquidProfiling

              
              06.09.2016 16:01, Faheem пишет:

              
                            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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