Sounds similar to the problem discussed here: http://blogs.everycity.co.uk/alasdair/2011/05/adjusting-drive-timeouts-with-mdb-on-solaris-or-openindiana/
Check 'iostat -xn' and see if one or more disks is stuck at 100%. -Chip On Thu, Oct 4, 2012 at 3:42 PM, Cindy Swearingen < cindy.swearin...@oracle.com> wrote: > Hi Charles, > > Yes, a faulty or failing disk can kill performance. > > I would see if FMA has generated any faults: > > # fmadm faulty > > Or, if any of the devices are collecting errors: > > # fmdump -eV | more > > Thanks, > > Cindy > > > On 10/04/12 11:22, Knipe, Charles wrote: > >> Hey guys, >> >> I’ve run into another ZFS performance disaster that I was hoping someone >> might be able to give me some pointers on resolving. Without any >> significant change in workload write performance has dropped off >> dramatically. Based on previous experience we tried deleting some files >> to free space, even though we’re not near 60% full yet. Deleting files >> seemed to help for a little while, but now we’re back in the weeds. >> >> We already have our metaslab_min_alloc_size set to 0x500, so I’m >> reluctant to go lower than that. One thing we noticed, which is new to >> us, is that zio_state shows a large number of threads in >> CHECKSUM_VERIFY. I’m wondering if that’s generally indicative of >> anything in particular. I’ve got no errors on any disks, either in zpool >> status or iostat –e. Any ideas as to where else I might want to dig in >> to figure out where my performance has gone? >> >> Thanks >> >> -Charles >> >> >> >> ______________________________**_________________ >> zfs-discuss mailing list >> zfs-discuss@opensolaris.org >> http://mail.opensolaris.org/**mailman/listinfo/zfs-discuss<http://mail.opensolaris.org/mailman/listinfo/zfs-discuss> >> > ______________________________**_________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/**mailman/listinfo/zfs-discuss<http://mail.opensolaris.org/mailman/listinfo/zfs-discuss> >
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