Linuxのメモリ圧縮ってどうなんだろう?Railsとかで使うのは悪手?JVMアプリだとどうだろう
if you want to compress more ANON memory, you may have to patch kernel to enable >100 swappiness (the max should be 199?). otherwise it (looks to be) always kicks page cache.
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is that zswap? Swap on zram should be just a swap and thus swappiness > 100 shouldn’t be required.
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compression only happens if (anon) page reach swap stage. so both zswap/zram applies. if you enable one of those, you must change your mind and consider swap to be a good thing.
End of conversation
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