When looking at individual processes (in Activity Monitor) you should view more columns than just 'memory' column. I am assuming that in both Macs you have zero swap. At minimum, the other numbers in Activity Monitor - App memory, wired, compressed, cache, and (by subtraction) free. If you want to diagnose the difference further you will need to collect a bit more than just that one number. Often, people describe everything except free memory as memory used. So, OS will not need clear the memory when the memory no mandatory hold, it just need mark the region "can be cover".įor example, the Browser data will not delete if unless the memory not enough, so next time the user open the some Browser, the program code and data such as picture can be load instead, without need access the SSD, it just like another cache.Īlthough in real world, the tidy table will get better efficiency for human, for computer that almost zero advantage. Table empty don't mean the efficiency good, it just mean nothing. It also have DMA mean CPU with Assistant for take/put book from table to bookshelf. The program data and resources will remain on the memory if memory pressure low. Modern OS like Catalina fully use of large system memory for boost of speed.Īs currently sandbox and auto release technology, program exits don't require real clear all program. The Memory is not leaking, it just modern OS work mechanism.
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