Colin, thanks for the link to https://github.com/openzfs/zfs/issues/9966 ; unfortunately I think that's a different problem, my meta use seems less drastic than the github issue
arc_prune 4 1859269059 arc_meta_used 4 3590932168 arc_meta_limit 4 94868305920 arc_dnode_limit 4 4294967296 arc_meta_max 4 79969748624 arc_meta_min 4 16777216 It looks like there's still 14898557296 bytes available for arc_meta. Do you know off-hand what the comment about the l2arc issue is? My l2arc is 1TB, well above 320 gigs. Here's where my stats are now (the system is not currently under any real load): $ cat /proc/spl/kstat/zfs/arcstats 13 1 0x01 96 4608 10492531405 1374854032619736 name type data hits 4 6820744874 misses 4 953303948 demand_data_hits 4 1163033450 demand_data_misses 4 112593263 demand_metadata_hits 4 5398565264 demand_metadata_misses 4 771209639 prefetch_data_hits 4 3978361 prefetch_data_misses 4 4454061 prefetch_metadata_hits 4 255167799 prefetch_metadata_misses 4 65046985 mru_hits 4 2596176358 mru_ghost_hits 4 7960783 mfu_hits 4 3972213379 mfu_ghost_hits 4 37066000 deleted 4 624581823 mutex_miss 4 66283716 access_skip 4 112 evict_skip 4 59660318004 evict_not_enough 4 531586443 evict_l2_cached 4 758952236544 evict_l2_eligible 4 6629993222656 evict_l2_ineligible 4 1055824726016 evict_l2_skip 4 4093 hash_elements 4 1382698 hash_elements_max 4 7705756 hash_collisions 4 101258453 hash_chains 4 54374 hash_chain_max 4 6 p 4 3403412095 c 4 9636886736 c_min 4 4221281536 c_max 4 126491074560 size 4 9501317832 compressed_size 4 6533731328 uncompressed_size 4 12946349568 overhead_size 4 1324591616 hdr_size 4 125140504 data_size 4 5910385664 metadata_size 4 1947937280 dbuf_size 4 313455312 dnode_size 4 801582080 bonus_size 4 304865408 anon_size 4 69632 anon_evictable_data 4 0 anon_evictable_metadata 4 0 mru_size 4 2874187264 mru_evictable_data 4 2820684800 mru_evictable_metadata 4 11149312 mru_ghost_size 4 1934149120 mru_ghost_evictable_data 4 254414848 mru_ghost_evictable_metadata 4 1679734272 mfu_size 4 4984066048 mfu_evictable_data 4 3089700864 mfu_evictable_metadata 4 293028864 mfu_ghost_size 4 32707072 mfu_ghost_evictable_data 4 32707072 mfu_ghost_evictable_metadata 4 0 l2_hits 4 16313870 l2_misses 4 936990042 l2_feeds 4 1342134 l2_rw_clash 4 1 l2_read_bytes 4 73933849600 l2_write_bytes 4 218946362880 l2_writes_sent 4 45529 l2_writes_done 4 45529 l2_writes_error 4 0 l2_writes_lock_retry 4 21 l2_evict_lock_retry 4 0 l2_evict_reading 4 0 l2_evict_l1cached 4 0 l2_free_on_write 4 878 l2_abort_lowmem 4 496 l2_cksum_bad 4 0 l2_io_error 4 0 l2_size 4 130902416896 l2_asize 4 98157307392 l2_hdr_size 4 97951584 memory_throttle_count 4 0 memory_direct_count 4 856012 memory_indirect_count 4 233680 memory_all_bytes 4 135081009152 memory_free_bytes 4 120346943488 memory_available_bytes 3 118236303360 arc_no_grow 4 0 arc_tempreserve 4 0 arc_loaned_bytes 4 0 arc_prune 4 1859269059 arc_meta_used 4 3590932168 arc_meta_limit 4 94868305920 arc_dnode_limit 4 4294967296 arc_meta_max 4 79969748624 arc_meta_min 4 16777216 sync_wait_for_async 4 608494 demand_hit_predictive_prefetch 4 5716590 arc_need_free 4 0 arc_sys_free 4 2110640768 Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1814983 Title: zfs poor sustained read performance from ssd pool To manage notifications about this bug go to: https://bugs.launchpad.net/zfs/+bug/1814983/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
