[CentOS] Why swap if there's still physical memory available
Scott McClanahan
smcclanahan at sigovs.comThu Nov 19 21:20:52 UTC 2009
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> Also, the top values may not tell the whole story - RES should include > paged-in code plus memory allocated by the program. VIRT includes code > not paged in yet and linked shared libraries, so the difference may not > all be in swap. > I thought I remembered reading (maybe LKML) that RES also didn't account for the COW efficiency of shared libraries. Meaning RES could potentially show a value which is larger than actual physical memory used. Sorry if I'm spreading misinformation :) Thanks.
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