Looking at the Mem line in your screenshot, we can see that the physical memory is basically full, with only 288868k free and less than 0.2G available. Where did more than 50 G of memory come from? . So the physical memory is not enough, so swap is used.
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Looking at the Mem line in your screenshot, we can see that the physical memory is basically full, with only 288868k free and less than 0.2G available. Where did more than 50 G of memory come from? . So the physical memory is not enough, so swap is used.