As a routine part of testing I have been testing a program with
//CEEOPTS DD *
RPTSTG(ON)
HEAPCHK(ON,10,0,10,10,1024,0)
/*
I do this for two purposes:
1. To check for storage leaks and corruption.
2. To see what the stack and heap requirements are. I then set the initial
heap sizes as recommended by RPTSTG.
Based on the following HEAPCHK report (partial) I have been setting the
initial ANYHEAP size to 7MB (with #pragma):
ANYHEAP statistics:
Initial size: 7340032
Increment size: 524288
Total heap storage used (sugg. initial size): 6400088
HEAP statistics:
Initial size: 524288
Increment size: 32768
Total heap storage used (sugg. initial size): 513072
Today, as an unrelated experiment, I ran with just RPTSTG(ON) and no
HEAPCHK. I was amazed to get the following ANYHEAP report:
ANYHEAP statistics:
Initial size: 7340032
Increment size: 524288
Total heap storage used (sugg. initial size): 88480
HEAP statistics:
Initial size: 524288
Increment size: 32768
Total heap storage used (sugg. initial size): 513072
Have I been vastly over-allocating heap based on RPTSTG's needs? Is the true
ANYHEAP need of the program only 88K, not almost 7MB? I don't know how else
to interpret this information. Can anyone enlighten me?
Thanks,
Charles
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