Improve CA Allocate Performance

Document ID : KB000056669
Last Modified Date : 14/02/2018
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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 caustion 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.

 

If any questions, please contact CA Technical Support.