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Memory Leakage in VFP 3.0b?
Message
From
19/10/1997 15:38:01
Dragan Nedeljkovich (Online)
Now officially retired
Zrenjanin, Serbia
 
General information
Forum:
Visual FoxPro
Category:
Other
Miscellaneous
Thread ID:
00055142
Message ID:
00055404
Views:
25
>Running System Monitor at this point shows that Allocated Memory = 70mb! So >I'm assuming that physical memory is exhausted and we're heavily into >virtual memory (i.e. disk swap file). > >The class in question has a slew of class arrays which get reDIMENSIONED >for every record processed, and I'm suspecting that may be related to the >problem. I've already checked the obvious things like # of temp files, etc. > >Any ideas, or suggestions would be welcome. For one, I've used arrays a lot, but then, I've never used them on such a large scale. Probably redimensioning arrays behaves like resizing the strings, i.e. leaves memory holes. I've never found any tech doc on the subject of garbage collection in any version of Fox - just a little note saying that it gets done in the background. One thing may help (maybe?) - try releasing the arrays before redimensioning, or using normal arrays instead of class arrays... if I got you right - is it dimensioned properties, or arrays of objects?. In the latter case, maybe you should set the arrays to .null. values to release the objects referenced in the arrays before redimensioning (and/or releasing) the arrays. See, this is pure guesswork, since I know literally nothing of the mechanism of memory allocation and deallocation which takes place when an object gets created and released. From your 70 meg story, it seems that lots of objects never get released, probably until the routine which created them exits. I think there's a lot of trial/error cycles ahead of you.

back to same old

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