This system exhibits the symptoms of : http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6495013
Moving to nevada would certainly help as it has many more bug fixes and performance improvements over S10U3. -- Prabahar. ?ukasz wrote: > Hello, > I'm investigating problem with ZFS over NFS. > The problems started about 2 weeks ago, most nfs threads are hanging in > txg_wait_open. > Sync thread is consuming one processor all the time, > Average spa_sync function times from entry to return is 2 minutes. > I can't use dtrace to examine problem, because I keep getting: > dtrace: processing aborted: Abort due to systemic unresponsiveness > > Using mdb and examining tx_sync_thread with ::findstack I keep getting this > stack: > fffffe8002da1410 _resume_from_idle+0xf8() ] > fffffe8002da1570 avl_walk+0x39() > fffffe8002da15a0 space_map_alloc+0x21() > fffffe8002da1620 metaslab_group_alloc+0x1a2() > fffffe8002da16b0 metaslab_alloc_dva+0xab() > fffffe8002da1700 metaslab_alloc+0x51() > fffffe8002da1720 zio_dva_allocate+0x3f() > fffffe8002da1730 zio_next_stage+0x72() > fffffe8002da1750 zio_checksum_generate+0x5f() > fffffe8002da1760 zio_next_stage+0x72() > fffffe8002da17b0 zio_write_compress+0x136() > fffffe8002da17c0 zio_next_stage+0x72() > fffffe8002da17f0 zio_wait_for_children+0x49() > fffffe8002da1800 zio_wait_children_ready+0x15() > fffffe8002da1810 zio_next_stage_async+0xae() > fffffe8002da1820 zio_nowait+9() > fffffe8002da18b0 arc_write+0xe7() > fffffe8002da19a0 dbuf_sync+0x274() > fffffe8002da1a10 dnode_sync+0x2e3() > fffffe8002da1a60 dmu_objset_sync_dnodes+0x7b() > fffffe8002da1af0 dmu_objset_sync+0x6a() > fffffe8002da1b10 dsl_dataset_sync+0x23() > fffffe8002da1b60 dsl_pool_sync+0x7b() > fffffe8002da1bd0 spa_sync+0x116() > > I also managed to sum metaslabs space maps: > ::walk spa | ::walk metaslab | ::print struct metaslab ms_smo.smo_objsize > and I got 1GB. > > I have a pool 1,3T with 500G avail space. > Pool was created about 3 months ago. > I'm using solaris 10 u3 > > Do you think changing system to nevada will help ? > I red that there are some changes that can help: > http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6512391 > http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6532056 > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
