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Trying to track down memory leak(s)
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To
23/09/2011 15:06:31
General information
Forum:
Visual FoxPro
Category:
Troubleshooting
Environment versions
Visual FoxPro:
VFP 9 SP2
Miscellaneous
Thread ID:
01398453
Message ID:
01524543
Views:
101
>>In my other thread that has 0 answers I posted the procedure I'm trying. I'm running calling the same method in a loop of 500 iterations. I ran 20+ tests yesterday and couple today - I always got the same result - the execution time of each call gradually increases.
>>The clients experience exactly the same problem, so they have been restarting this dll after ~30 minutes of work.
>
>
>(1) Does the memory size increase ?
>(2) Did you use the task manager to verify that the memory size of the process increases
>(3) When the execution times increase, do you infer that the memory has increased ? In case you do - not necessarily a good conclusion
>
>(4) It may be worthwhile to decrease the buffer space of the process - try setting sys(3050, 1, 64*1024*1024) - same for sys(3050, 2, 64*1024*1024)
>Large memory buffers slow down - They were a good idea when all we had was 16MB of memory. With the GigaBytes today, a buffer that is too large slows down foxpro since it has to search in GigaBytes of memory - well not all of that memory, but the hash tables may be too large and use a lot of cpu cycles to search, even worse if foxpro were to use linear lists - which would not surprise me
>
>
>(5) Try using sys(1104) to purge foxpro's cache just before returning from your function
>
>
>Frankly, it does not seem like a memory leak

Ok, here is what I have
INVOKE GETITEM Turnaround: 0.13 Not purged memory 0 - at the beginning

and after 100 iterations
INVOKE GETITEM Turnaround: 0.40 Not purged memory 0

-----------------------
So, do you think I'm good now?
If it's not broken, fix it until it is.


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