Why are there many zombie processed shown in RamMap?


New Member
Sep 23, 2023
After some time using win10 (or other windows os), many zombie processes can be seen in RamMap, these PIDs can't be found in task manager.
Is there a bug in os memory management driver?
The presence of "zombie" processes, also known as ghost processes or virtual memory pages, in RamMap is not indicative of a bug in the operating system's memory management driver. It is a normal behavior caused by the way Windows handles its memory.

When a process terminates, the memory pages it was using are not immediately released back to the operating system. Instead, they are marked as free and available for other processes to use. However, the actual release of memory pages is deferred to optimize performance. This means that the process information may still be present in RamMap, but the corresponding process may not be visible in the task manager.

To understand this behavior, it's important to note that the memory management in Windows is quite complex. When a process terminates, the system assumes that the memory pages it was using may be needed again in the near future. Releasing these pages immediately and then reallocating them when required would be inefficient. Instead, Windows keeps track of the memory pages that were used by the terminated process and marks them as free, but it does not immediately release them.

As a result, RamMap may continue to display these pages as "zombie" processes even though the original process has already terminated. This is not a bug, but rather a design choice made to improve memory management efficiency. The system can quickly assign these free pages to new processes when memory demand increases, without the need to reallocate them.

In summary, the appearance of zombie processes in RamMap is a normal part of the Windows memory management process and does not indicate a bug in the memory management driver.
Top Bottom