Date: Mon, 20 Oct 2014 21:32:41 +0400 From: Alex <alex@putnichek.ru> To: freebsd-fs@freebsd.org Subject: l2_io_error and l2_cksum_bad are not null and growing Message-ID: <54454739.1070900@putnichek.ru>
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Hello. We seem to have a problem with l2arc on zfs system on 10.1-BETA1 FreeBSD 10.1-BETA1 #1 r271710 server. The server has a l2arc cache configured from Intel SSD 480G disk. The problem is that l2_io_error and l2_cksum_bad values are constantly growing, however there are no traces of any hardware malfunctioning. As for now, the values are kstat.zfs.misc.arcstats.l2_io_error: 1501 kstat.zfs.misc.arcstats.l2_cksum_bad: 19480 Here is the output of zpool status: pool: zpool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM zpool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 diskid/DISK-WD-WMC1P0DFSF47p2 ONLINE 0 0 0 diskid/DISK-WD-WMC1P0DEFERYp2 ONLINE 0 0 0 logs gpt/zil0 ONLINE 0 0 0 cache gpt/cache0 ONLINE 0 0 0 errors: No known data errors Here is the output of zfs-stats -L: ------------------------------------------------------------------------ ZFS Subsystem Report Mon Oct 20 19:29:38 2014 ------------------------------------------------------------------------ L2 ARC Summary: (DEGRADED) Passed Headroom: 72.42m Tried Lock Failures: 360.55m IO In Progress: 65 Low Memory Aborts: 101 Free on Write: 7.09k Writes While Full: 16.90k R/W Clashes: 11 Bad Checksums: 19.48k IO Errors: 1.50k SPA Mismatch: 1.18m L2 ARC Size: (Adaptive) 555.88 GiB Header Size: 0.21% 1.17 GiB L2 ARC Evicts: Lock Retries: 10 Upon Reading: 0 L2 ARC Breakdown: 272.76m Hit Ratio: 0.35% 949.30k Miss Ratio: 99.65% 271.81m Feeds: 2.19m L2 ARC Buffer: Bytes Scanned: 20.45 PiB Buffer Iterations: 2.19m List Iterations: 139.97m NULL List Iterations: 5.58k L2 ARC Writes: Writes Sent: 100.00% 567.37k Any help is welcome. Best regards -- Alex
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