Why is the total memory usage in Resource Monitor more than the total RAM of the NAS?

Last modified date: 2023-05-31

Applicable Products

Resource Monitor

Details

Resource Monitor shows the memory usage of processes based on the Resident Set Size (RSS) value. RSS is a measurement that shows how much RAM has been allocated to a process during its execution.

If multiple processes use the same libraries, then RSS will include the library sizes in each process, even though the libraries do not need to be loaded into RAM for each process. Because of this, when the memory use of processes is added up in Resource Monitor it may sometimes exceed the total RAM size of the NAS.

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