CA Allocate

Improve CA Allocate Performance

  • 1.  Improve CA Allocate Performance

    Posted 02-25-2015 10:52 AM

    There are 4 Vkgparms that together, significantly improve CA Allocate performance:

    - 13% faster in elapsed time

    - 17% less MIPS

    - 19% less CPU time

    - 50% Reduction in Allocate elapsed time

    (The tests were done in a lab environmnet using streams of 11,000 IDCAMS allocations.

     

    The Vkgparms to get this improvement are:

     

    PLSOPT79 (Y)            * PERF - SKIP THE CVAF CALLS                 

    PLSOPT80 (Y)            * PERF - SKIP EDT CALL - (Y) ONLY IF ALL 3390

    PLSOPT81 (Y)            * PERF - ASR RELEASED AFTER 30-SEC. WAIT     

    PLSOPT82 (Y)            * PERF - ACCESS TO CVAF INFO NOT SERIALIZED  

     

    One caution about PLSOPT80 is this:

     

    If PLSOPT80 (Y) is specified and the ACTIVATE IODF command is entered, this could create

    EDT problems.  If this occurs, enter the command:  F VAM,REFRESH

    ...to rebuild the internal EDT table and be in synch with the new EDT just changed.