![]() So wash/rinse/repeat for every process listed in Activity Monitor -> View -> All Processes, and you will find that the amount of virtual memory being used is huge.Īnd if it is not clear yet. Now repeat that for every process, and eventually you are consuming a lot of physical RAM just to manage the page tables.įor example if a page table entry takes 128 bits (16 bytes), that 1,128,840 page table entries would consume 18,077,440 (about 17MB of RAM). That is 1,129,840 (million) page table entries. You will notice that the physical memory being used in 392.9MB, but the virtual memory being used is 4.31GB.Įvery 4K of that 4.31GB needs an entry in the operating system page tables to keep track of where that 4K lives. Select process (app), and use Activity Monitor -> View -> Inspect Process -> Memory (or select process, Command-I (command-eye), or select process and click on the ℹ (info) button in the Activity Monitor upper left edge of the window) You can still see virtual memory usage for a process via Activity Monitor. Secondly It may seem like a daft question but how do I identify a virtual memory hog? Activity monitor shows memory for processes but none appear to be particularly large.Īctivity Monitor used to have a virtual memory column, but they did away with it a few operating system release ago. ![]() ![]() Thus the MacBook would likely slow down but not stop completely (which is what appears to happen). ![]() I always thought that the point of virtual memory was that it would be swapped in/out of disk provided that there was available disk space. ![]()
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