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Asked: 2026-05-23T12:42:48+00:00

I currently have some trouble with the Heap in a program of mine. While

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I currently have some trouble with the Heap in a program of mine. While I was googling my way through the internet to find solutions I came across a page from the MSDN that describes some linker options for heap allocation that I don’t understand.

The documentation says that you can set the Heapsize with /HEAP.

I always knew that the stack size was fixed and that makes sense to me. But I always thought that the Heap is variable in size. To add some more confusion I found that the default value is 1MB. I have written lots of programs that use more than 1 MB of memory.

What exactly does the /HEAP Option do then?

Thanks

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1 Answer

  1. Editorial Team

    windows gives .exes (processes) memory by giving them read/write acess to pages of memory. To the C++ programmer, it should be left to the operating system, never to be messed with

    /HEAP 1,000,000 means that an .exe starts up with 1,000,000 bytes worth of pages… TO START WITH. Changing this value shouldn’t affect anything. Windows automatically pages in memory. It’s just a hint for windows to give this process the memory it needs for performance.

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