Date: Sat, 06 Dec 2014 14:45:20 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 195746] New: zfs L2ARC wrong alloc/free size Message-ID: <bug-195746-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D195746 Bug ID: 195746 Summary: zfs L2ARC wrong alloc/free size Product: Base System Version: 10.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: danmer@danmer.net There is a server FreeBSD 10.1-RELEASE GENERIC kernel amd64 with 2 zfs pool= s. There are two Intel 480Gb SSD disks in server, used like ZIL (mirror 4GB per pool) and L2ARC (stripe 75+75 GB per pool). On some zfs datasets compression are used. After same days working I noticed wrong L2ARC alloc and free sizes pool1 in zpool iostat -v, later I seen same wrong size in pool2. It looks l= ike: pool alloc free read write read wr= ite ------------------------------------ ----- ----- ----- ----- ----- --= --- pool1 13,0T 34,3T 45 3,56K 3,93M 51= ,9M raidz3 13,0T 34,3T 45 3,51K 3,93M 47= ,1M multipath/pd01 - - 31 97 311K 4,= 96M multipath/pd02 - - 31 97 311K 4,= 96M multipath/pd03 - - 31 97 311K 4,= 96M multipath/pd04 - - 31 97 311K 4,= 96M multipath/pd05 - - 31 97 311K 4,= 96M multipath/pd06 - - 31 97 311K 4,= 96M multipath/pd07 - - 31 97 311K 4,= 96M multipath/pd08 - - 31 97 311K 4,= 96M multipath/pd09 - - 31 97 311K 4,= 96M multipath/pd10 - - 31 97 311K 4,= 96M multipath/pd11 - - 31 97 311K 4,= 96M multipath/pd12 - - 31 97 311K 4,= 96M multipath/pd13 - - 31 97 311K 4,= 96M logs - - - - - = - mirror 812K 3,97G 0 45 0 4,= 83M diskid/DISK-CVWL435200Y1480QGNp1 - - 0 45 4 4,= 83M diskid/DISK-CVWL4353000F480QGNp1 - - 0 45 4 4,= 83M cache - - - - - = - diskid/DISK-CVWL435200Y1480QGNp4 371G 16,0E 4 27 163K 3,= 16M diskid/DISK-CVWL4353000F480QGNp4 441G 16,0E 8 25 145K 2,= 94M ------------------------------------ ----- ----- ----- ----- ----- --= --- pool2 10,2T 37,0T 81 1,36K 9,82M 80= ,2M raidz3 10,2T 37,0T 81 870 9,82M 45= ,9M multipath/pd14 - - 21 82 903K 4,= 67M multipath/pd15 - - 21 82 903K 4,= 67M multipath/pd16 - - 21 82 903K 4,= 67M multipath/pd17 - - 21 82 903K 4,= 67M multipath/pd18 - - 21 82 904K 4,= 67M multipath/pd19 - - 21 82 903K 4,= 67M multipath/pd20 - - 21 82 903K 4,= 67M multipath/pd21 - - 21 82 903K 4,= 67M multipath/pd22 - - 21 82 903K 4,= 67M multipath/pd23 - - 21 82 903K 4,= 67M multipath/pd24 - - 21 82 903K 4,= 67M multipath/pd25 - - 21 82 903K 4,= 67M multipath/pd26 - - 21 82 903K 4,= 67M logs - - - - - = - mirror 238M 3,74G 0 525 0 34= ,3M diskid/DISK-CVWL435200Y1480QGNp2 - - 0 525 4 34= ,3M diskid/DISK-CVWL4353000F480QGNp2 - - 0 525 4 34= ,3M cache - - - - - = - diskid/DISK-CVWL435200Y1480QGNp5 207G 16,0E 1 21 45,1K 2,= 56M diskid/DISK-CVWL4353000F480QGNp5 203G 16,0E 2 21 94,6K 2,= 60M Cache values =E2=80=9C371G 16,0E=E2=80=9D are abnormal, real aloc size is = 75G. After that I looked zfs-stat -L and seen DEGRADED L2ARC and too big L2ARC size: L2 ARC Summary: (DEGRADED) Passed Headroom: 6.05m Tried Lock Failures: 22.36m IO In Progress: 2.75k Low Memory Aborts: 2.86k Free on Write: 5.48m Writes While Full: 339.48k R/W Clashes: 2.07k Bad Checksums: 211.52k IO Errors: 101.41k SPA Mismatch: 3.16b L2 ARC Size: (Adaptive) 1.27 TiB Header Size: 1.42% 18.56 GiB kstat.zfs.misc.arcstats.l2_io_error: 101531 kstat.zfs.misc.arcstats.l2_cksum_bad: 211782 smartctl show that both SSD is fine, without any IO errors. After reboot no problem's for some time. I found same issues which described about L2ARC compression: http://forums.freebsd.org/threads/l2arc-degraded.47540/ http://lists.freebsd.org/pipermail/freebsd-current/2013-October/045088.html My problem looks like same bug. --=20 You are receiving this mail because: You are the assignee for the bug.=
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