Is there a limit to the number of interfaces you can have?

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  • #50546
    Ariba Jones
    Participant

    We have encountered an issue with one of our interface servers.  We have had to start deleting some of our test interfaces to allow space for any new interfaces.  It is not a Cloverleaf server.  It has prompted me to ask this about Cloverleaf.

    Is there a limit to the number of total interfaces you can have on Cloverleaf?  This would be the number of interfaces for all sites you have on Cloverleaf combined.

    Thanks,

    Ariba

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    • #66556
      Jim Kosloskey
      Participant

      Ariba,

      There is no hard and fast ‘limit’ (unless you are thread number licensed).

      The consumption of your integrations versus the capacity of your platform will determine when you are ‘out of gas’.

      It is a good idea to have a methodology for determining your utilization and your potential capacity. Then monitor routinely so you can predict when you might hit the wall.

      You can have a situation where a given process is lagging but have sufficient capacity still left on your platform.  That is not an overall limit but a ‘local’ (process level) limit.

      That situation usually indicates some re-architecting of the process needs to take place.

      Assuming you have everything as streamlined as possible then you should be able to predict to some degree when you will need to do something before it becomes a necessity (assuming you are given the time to establish a methodology and do the monitoring and forecasting – most places think of that as a ‘luxury’.

      One resource that has always been overlooked but frequently causes capacity issues is disk space. This has been true for virtually the my whole career no matter what platform. If the disk subsystem becomes constrained then the number one rule of computer performance comes into play ‘all computers, no matter their rated speed, wait at the same speed’.

      Good luck!

      email: jim.kosloskey@jim-kosloskey.com

    • #66557
      John Mercogliano
      Participant

      Ariba,

       You didn’t mention what platform your on, but we ran into a similiar issue when  we started implementing Epic we started hitting the semaphore, shared memory, and max user process limits.  

       We are on HP-UX 11.11 so, we just had our system admins increase the kernel values so we went from 95% usage to below 50 to give us room to grow.  The installation guide has a list of critical parameters for each OS and your system admin should be able to run a monitoring application to let you know what system resource is running consistently high.

       I wrote a tcl proc to get my system parameters for an HP system.  Glanceplus on unix can also be used to take a peak at what is going on.  

      Hope this helps,

      John Mercogliano
      Sentara Healthcare
      Hampton Roads, VA

    • #66558
      Ariba Jones
      Participant

      Thanks for this information, Jim and John!!

      I will look into a methodology for monitoring utilization and capacity.

      John- This has not happened on our Cloverleaf server.  We also have Cerner and it has occurred on the OpenEngine for Cerner.  Apparently, there is a limit to the number of interfaces you can have on OpenEngine.

      Thanks again for the input.

      Ariba

    • #66559
      Jim Kosloskey
      Participant

      Ariba,

      It may be the Open Engine is licensed for only a certain number of ‘interfaces’.

      If that is the case and not a capacity issue with the Cerner platform, then I am sure with the appropriate sum of money offered to Cerner they would be happy to license for more  🙄

      Check to see if there is a licensing issue before taking a chance on chasing your tail.

      email: jim.kosloskey@jim-kosloskey.com

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