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On Friday, July 22 at 10:56 (+1000), Adam Carter said: |
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> Its more how much i/o rather than the size. If you have a bunch of |
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> stuff swapped out, but it hardly ever needs to be swapped in, the |
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> impact will be low. |
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> |
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> Keep an eye on the use with vmstat; |
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> |
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> adam@rix ~ $ vmstat 5 |
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> procs -----------memory---------- ---swap-- -----io---- -system-- |
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> ----cpu---- |
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> r b swpd free buff cache si so bi bo in cs us |
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> sy id wa |
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> 0 0 56700 351244 79564 207848 0 0 3 3 11 7 1 |
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> 0 99 0 |
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> 0 0 56700 351244 79564 207848 0 0 0 8 52 27 0 |
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> 0 100 0 |
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> 0 0 56700 351244 79564 207848 0 0 0 0 45 14 0 |
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> 0 100 0 |
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> 0 0 56700 351244 79564 207848 0 0 0 0 47 17 0 |
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> 0 100 0 |
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> |
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> from the man page; |
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> Swap |
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> si: Amount of memory swapped in from disk (/s). |
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> so: Amount of memory swapped to disk (/s). |
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> |
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> |
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Exactly! My system is the same way. |
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Right now I've got a 4GB system that's using 708MB swap. But vmstat |
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isn't showing any swap activity. Why? Because some processes that I'm |
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not aware about because I'm obviously not using, got swapped out a long |
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time ago, and Linux is using that reclaimed RAM to compile chromium ;) |
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If/when I need part of that 708MB becomes active, Linux will swap it |
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back in in one short burst that I doubt that I'll even notice. |
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