When/why should heapmin be used?

A customer has some memory usage requirements of our application. They note that while our committed memory is reasonable, the reserved memory is high. They suspect this is because the CR开发者_高级运维T heap grows as we allocate memory, but the CRT isn't returning pages to the OS when the memory is deallocated. We are just using built-in operator new/delete/new[]/delete[] - along with a little usage of malloc/free.

They ask, "Does your memory manager call _heapmin at some point to compact the heap?"

ummm, we don't explicitly call _heapmin. Should we? Are there any rules of thumb for its use?

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As you are using the CRT memory manager there is no need to call it explicitly the OS will manage this.