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Asked: 2026-05-11T06:11:18+00:00

I have a program that needs a lot of memory, and it crashes as

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I have a program that needs a lot of memory, and it crashes as soon as the 2GB virtual address space is reached. Sysinternals process explorer displays this as ‘virtual size’ column. How can I determine this ‘virtual size’ with C (or C++) code?

Ok, I have to query a performance counter for ‘Virtual Bytes’. Perfmon shows the query string (or how it is called) as, for example, ‘\Process(firefox)\Virtuelle Größe’ on my German Win XP installation.

How do I determine the query string for the ‘current process’, and is there a non-localized name for it?

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1 Answer

  1. According to MSDN: Memory Performance Information PROCESS_MEMORY_COUNTERS_EX.PrivateUsage is the same as VM Size in Task Manager in Windows XP. GetProcessMemoryInfo should work:

    PROCESS_MEMORY_COUNTERS_EX pmcx = {}; pmcx.cb = sizeof(pmcx); GetProcessMemoryInfo(GetCurrentProcess(),     reinterpret_cast<PROCESS_MEMORY_COUNTERS*>(&pmcx), pmcx.cb);

    Now pmcx.PrivateUsage holds the VM Size of the process.

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