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I'm learning to manage a VPS LAMP server. I noticed that whenever Apache consumes more RAM than is allotted, the server disk I/O rate jumps from a negligible value to a big value like 3k/hour.

Why is this so? What exactly is happening?


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up vote 5 down vote accepted

I would have to guess that this is because you have a swapfile/partition setup and the system is swapping.

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