Date: Tue, 15 Oct 2013 14:53:31 +0300 From: Dmitriy Makarov <supportme@ukr.net> To: freebsd-current@freebsd.org Subject: Re: vmstat -z: zfs related failures on r255173 Message-ID: <1381837350.494453682.d94z37mg@frv45.ukr.net> In-Reply-To: <1381521443.74219922.8eyuscyw@frv45.ukr.net> References: <1381521443.74219922.8eyuscyw@frv45.ukr.net>
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Please, any idea, thougth, help! Maybe what information can be useful for diggin - anything... System what I'm talkin about has a huge problem: performance degradation in short time period (day-two). Don't know can we somehow relate this vmstat fails with degradation. > Hi all > > On CURRENT r255173 we have some interesting values from vmstat -z : REQ = FAIL > > [server]# vmstat -z > ITEM SIZE LIMIT USED FREE REQ FAIL SLEEP > ....... skipped.... > NCLNODE: 528, 0, 0, 0, 0, 0, 0 > space_seg_cache: 64, 0, 289198, 299554,25932081,25932081, 0 > zio_cache: 944, 0, 37512, 50124,1638254119,1638254119, 0 > zio_link_cache: 48, 0, 50955, 38104,1306418638,1306418638, 0 > sa_cache: 80, 0, 63694, 56, 198643,198643, 0 > dnode_t: 864, 0, 128813, 3, 184863,184863, 0 > dmu_buf_impl_t: 224, 0, 1610024, 314631,157119686,157119686, 0 > arc_buf_hdr_t: 216, 0,82949975, 56107,156352659,156352659, 0 > arc_buf_t: 72, 0, 1586866, 314374,158076670,158076670, 0 > zil_lwb_cache: 192, 0, 6354, 7526, 2486242,2486242, 0 > zfs_znode_cache: 368, 0, 63694, 16, 198643,198643, 0 > ..... skipped ...... > > Can anybody explain this strange failures in zfs related parameters in vmstat, can we do something with this and is this really bad signal? > > Thanks!
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