How To Measure the Working Set Size on Linux
Brendan Gregg
JANUARY 17, 2018
OSes usually show you virtual memory and resident memory, shown as the "VIRT" and "RES" columns in top. Short durations can be useful for understanding how well a WSS will fit into the CPU caches (L1/L2/L3, TLB L1/L2, etc). That's the working set size. It is used for capacity planning and scalability analysis. Consider these overheads.
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