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Swapoff Performance

Sep 11, 2007, 07:30 (1 Talkback[s])

"'My experiments show that when there is not much free physical memory, swapoff moves pages out of swap at a rate of approximately 5mb/sec,' Daniel Drake noted in a recent discussion about swapoff performance. He added, 'I've read into the swap code and I have some understanding that this is an expensive operation (and has to be).' Hugh Dickins acknowledged, 'Yes, it can be shamefully slow. But we've done nothing about it for years, simply because very few actually suffer from its worst cases. You're the first I've heard complain about it in a long time: perhaps you'll be joined by a chorus, and we can have fun looking at it again...'"

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