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• #15992 Воланд titán Gh00st #15990

  Új Válasz 2015-08-05 14:37:41 #15992

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  Воланд

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  válasz Gh00st #15990 üzenetére

  "An important word there is “could.” Windows establishes a “commit limit” based on your available physical memory and page file size(s). When a section of virtual memory is marked as “commit” – Windows counts it against that commit limit regardless of whether it’s actually being used. The idea is that Windows is promising, or “committing,” to providing a place to store data at these addresses. For example, an application can call VirtualAlloc with MEM_COMMIT for 4MB but only actually write 2MB of data to it. This will likely result in 2MB of physical memory being used. The other 2MB will never use any physical memory unless the process reads from or writes to it. It is still charged against the commit limit, because Windows has made a guarantee that the application can write to that space if it wants. Note that Windows has not promised 4MB of physical memory, however. So when the process writes there, it may use physical memory or it may use the page file.

  This is a great example of why disabling your page file is a bad idea. If you don’t have one, Windows will be forced to back all commits with physical memory, even committed pages which are never used!" [link]

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