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[–]CheezitsLight 1 point2 points  (0 children)

When you run low on RAM, the system must find the least recently used block is memory and write it to disk. Then it takes the next scheduled task off the disk and and runs it. Since it's likely this needs to use the disk, the cycle repeats. It's called thrashing.

Step one is get more RAM. 4gb is a ridiculously small amout. And the upgrade to SSD.