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On Thursday 21 July 2011 21:08:49 Albert Hopkins did opine thusly: |
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> > "When a linux machine hits swap, it does so very aggressively, |
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> > there is nothing nice about it at all. The entire machine slows |
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> > to a painstaking crawl for easily a minute at a time while the |
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> > kernel writes pages out to disk, and disk is thousands of times |
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> > slower than RAM. |
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> > |
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> > |
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> |
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> This is not entirely true. There's regular swapping and there is |
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> "thrashing". |
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Yes, thrashing is the correct word for what I described. |
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I very seldom see swapping happen as one expects swap to be used, it |
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almost always becomes thrashing shortly thereafter, and we do monitor |
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our machines closely at work. |
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That's what I've observed and it's not a large data set so I could be |
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completely wrong. |
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-- |
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alan dot mckinnon at gmail dot com |
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