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POMy program never releases the memory back. Why?
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4463979
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4470215
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2010-12-17T15:22:22.367
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2010-12-16T18:10:52.737
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2018-08-28T07:32:48.680
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2017-05-23T12:26:55.343
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Body
I have a MDI program. When It starts it takes 2-3MB of RAM. Then, in this program I create about 260 MDI child windows (each has a TStringGrid, a bitmap and some other controls) and display some data. The application needs about 500MB to load all those windows. If I close each MDI child manually, the application still uses 160MB of RAM. Why it doesn't return to few MB of RAM? Should I worry about this? 160MB it is A LOT for a system that has only 1GB or RAM!! Note: I use the WORKING SET column in Task Manager to see RAM statistics. Maybe I need a better tool to read the RAM utilization. (Private Working Set is just a bit smaller than Working Set). This is not a leak! FastMM (set on aggressive) indicates no memory leak when I close the program. See my Answer post for additional evidence that it isn't a leak. I release stuff Many people told me that closing a child window only hides it. I know that. I use "Action:= caFree" to actually release the forms. Each form is responsible for releasing the controls it holds. Answer I have found that FastMM is responsible for this. See the answer I posted below. <hr> Delphi 7, Win 7 32 bit Similar posts: <a href="https://stackoverflow.com/questions/2031577/can-memory-be-cleaned-up/4493826#4493826">Can memory be cleaned up?</a> <a href="https://stackoverflow.com/questions/4493917/when-to-call-setprocessworkingsetsize-convincing-the-memory-manager-to-release">When to call SetProcessWorkingSetSize? (Convincing the memory manager to release the memory)</a>
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<delphi>
Title
My program never releases the memory back. Why?
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