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.