Date: Sun, 26 Jan 2014 11:06:15 +0100 From: "Nagy, Attila" <bra@fsn.hu> To: freebsd-fs@freebsd.org Subject: Lot more swapping in stable/10 with ZFS Message-ID: <52E4DE17.3000206@fsn.hu>
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Hi, Running stable/10@r261157 (and earlier too), I've noticed that it swaps much more than previous (stable/9) versions. Current top output from such a machine: Mem: 251M Active, 21M Inact, 7491M Wired, 118M Cache, 17M Buf, 51M Free ARC: 5112M Total, 1455M MFU, 2155M MRU, 7761K Anon, 293M Header, 1223M Other Swap: 2045M Total, 757M Used, 1287M Free, 37% Inuse, 1280K Out (there are frequent ins too, so I wouldn't say that the kernel just throws unused pages out) Why ZFS keeps its cache instead of releasing it and free up memory to avoid swapping? Is there a better way to change this than lowering ARC's maximum usage? All *swap* sysctl values are the same as on 9 versions. Is this something changed in the VM handling or in ZFS? Thanks,
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