3 Replies Latest reply on Jul 8, 2010 11:17 AM by Mr. Wick

    Second Polling Engine

    Mr. Wick

      Hello everybody,

      I am have installed a second SLX polling engine to relieve the stress on our over-burdened original poller.  I've run into a curious discrepancy in the Polls per Second tuning wizard.  Both servers are identical VMs.

      On the original server, recommended PPS Tuning:

      Node and Interface Status Polls: 241/sec

      Statistics Collection: 98/sec

      On new server, recommended PPS tuning:

      Node and Interface Status Polls:  8/sec

      Statistics Collection:  8/sec

      What reason would there be such a large difference between identical servers?  If I ignore these recommendations, am I in peril of a poorly performing secondary poller? 

      Any help would be great!

      Thanks, Dan.

        • Re: Second Polling Engine
          njoylif

          That is based on the number of Nodes/interfaces and frequency that the poller has to poll.
          I would guess you have not put many devices on the new poller yet.
          If you want to even out some, you will need to move about half of your pollers (based on nodes/interfaces/poll frequency) over to the new system.  Then take a look at that value.

           

          BTW, Love the Avitar

            • Re: Second Polling Engine
              warbird

              njoylif is correct.  I run 4 pollers, including the primary.  We are monitoring 1100+ nodes and ~20,000 elements.  As I brought on each new poller, I moved a bunch of nodes over to it.  With each new set of nodes, the recommended numbers in the PPS utility increased.

              If you are unaware, an easy way to move nodes to your new engine is to fire up the Monitor Polling Engines tool on your primary poller.  In the top tool bar is an icon for Poller Load Balancing.  You will need to have shut down your polling engines before moving nodes over.  Once you've moved a bunch of nodes over, rerun your PPS utility on the new poller.  I forget if you need to let the poller run for a few before you run PPS again or not.

              HTH.

                • Re: Second Polling Engine
                  Mr. Wick

                  Njoylif - You are correct, I hadn't yet moved any devices to the second poller at the time I posted.  I just assumed that the recommended numbers would be based rather on specs rather than load.  You know what that gets you.  After moving about a quarter of my elements, the numbers were indeed completely different.

                  Warbird - I used the Load Balancing feature.  Worked pretty slick, but not quite as advertised.  It's pretty geeky for me to be excited about this, but I am.

                  Thanks both of you for the quick response and help!