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