July 28, 20241 yr Hi to all, i have a problem, i want expand ZFS ARC Cache on my system but every change not receipt after boot I have 128GB but # cat /proc/spl/kstat/zfs/arcstats | grep c_max c_max 4 4294967296 my configuration is # cat /boot/config/modprobe.d/zfs.conf options zfs zfs_arc_max=17179869184 Can you help me? thanks a lot Edited July 28, 20241 yr by xcaosx
July 28, 20241 yr Author # cat /proc/spl/kstat/zfs/arcstats 9 1 0x01 147 39984 45684676983 20996214794129 name type data hits 4 42317170 iohits 4 340585 misses 4 176817 demand_data_hits 4 401020 demand_data_iohits 4 60 demand_data_misses 4 26921 demand_metadata_hits 4 40365889 demand_metadata_iohits 4 2061 demand_metadata_misses 4 46150 prefetch_data_hits 4 1174 prefetch_data_iohits 4 0 prefetch_data_misses 4 61771 prefetch_metadata_hits 4 1549087 prefetch_metadata_iohits 4 338464 prefetch_metadata_misses 4 41975 mru_hits 4 6427524 mru_ghost_hits 4 721 mfu_hits 4 35889646 mfu_ghost_hits 4 35 uncached_hits 4 0 deleted 4 221012 mutex_miss 4 17 access_skip 4 1 evict_skip 4 299 evict_not_enough 4 0 evict_l2_cached 4 16896 evict_l2_eligible 4 24849458688 evict_l2_eligible_mfu 4 159492608 evict_l2_eligible_mru 4 24689966080 evict_l2_ineligible 4 139730944 evict_l2_skip 4 0 hash_elements 4 558999 hash_elements_max 4 606801 hash_collisions 4 26297 hash_chains 4 9079 hash_chain_max 4 3 meta 4 1061209293 pd 4 2301035309 pm 4 2147291658 c 4 4294967296 c_min 4 4216201088 c_max 4 4294967296 size 4 4291546408 compressed_size 4 2781537280 uncompressed_size 4 4385543680 overhead_size 4 604737024 hdr_size 4 29631008 data_size 4 2619246080 metadata_size 4 767028224 dbuf_size 4 154667912 dnode_size 4 364922304 bonus_size 4 303401152 anon_size 4 3080192 anon_data 4 184320 anon_metadata 4 2895872 anon_evictable_data 4 0 anon_evictable_metadata 4 0 mru_size 4 2415815168 mru_data 4 2233806848 mru_metadata 4 182008320 mru_evictable_data 4 2021756416 mru_evictable_metadata 4 62842368 mru_ghost_size 4 570032128 mru_ghost_data 4 570032128 mru_ghost_metadata 4 0 mru_ghost_evictable_data 4 570032128 mru_ghost_evictable_metadata 4 0 mfu_size 4 967378944 mfu_data 4 385254912 mfu_metadata 4 582124032 mfu_evictable_data 4 383292928 mfu_evictable_metadata 4 94414336 mfu_ghost_size 4 158458880 mfu_ghost_data 4 0 mfu_ghost_metadata 4 158458880 mfu_ghost_evictable_data 4 0 mfu_ghost_evictable_metadata 4 158458880 uncached_size 4 0 uncached_data 4 0 uncached_metadata 4 0 uncached_evictable_data 4 0 uncached_evictable_metadata 4 0 l2_hits 4 98 l2_misses 4 249 l2_prefetch_asize 4 7393280 l2_mru_asize 4 52287053824 l2_mfu_asize 4 1555562496 l2_bufc_data_asize 4 53663244288 l2_bufc_metadata_asize 4 186765312 l2_feeds 4 20377 l2_rw_clash 4 0 l2_read_bytes 4 521216 l2_write_bytes 4 1426432 l2_writes_sent 4 52 l2_writes_done 4 52 l2_writes_error 4 0 l2_writes_lock_retry 4 0 l2_evict_lock_retry 4 0 l2_evict_reading 4 0 l2_evict_l1cached 4 0 l2_free_on_write 4 0 l2_abort_lowmem 4 0 l2_cksum_bad 4 0 l2_io_error 4 0 l2_size 4 54477099008 l2_asize 4 53834371072 l2_hdr_size 4 42177792 l2_log_blk_writes 4 0 l2_log_blk_avg_asize 4 20255 l2_log_blk_asize 4 5357568 l2_log_blk_count 4 430 l2_data_to_meta_ratio 4 632 l2_rebuild_success 4 1 l2_rebuild_unsupported 4 0 l2_rebuild_io_errors 4 0 l2_rebuild_dh_errors 4 0 l2_rebuild_cksum_lb_errors 4 0 l2_rebuild_lowmem 4 0 l2_rebuild_size 4 54472592896 l2_rebuild_asize 4 53849157632 l2_rebuild_bufs 4 439460 l2_rebuild_bufs_precached 4 11 l2_rebuild_log_blks 4 430 memory_throttle_count 4 0 memory_direct_count 4 0 memory_indirect_count 4 0 memory_all_bytes 4 134918434816 memory_free_bytes 4 121582100480 memory_available_bytes 3 117013295232 arc_no_grow 4 0 arc_tempreserve 4 0 arc_loaned_bytes 4 0 arc_prune 4 28 arc_meta_used 4 1661828392 arc_dnode_limit 4 429496729 async_upgrade_sync 4 186 predictive_prefetch 4 1987368 demand_hit_predictive_prefetch 4 145745 demand_iohit_predictive_prefetch 4 1340 prescient_prefetch 4 5103 demand_hit_prescient_prefetch 4 4682 demand_iohit_prescient_prefetch 4 421 arc_need_free 4 0 arc_sys_free 4 4568805248 arc_raw_size 4 0 cached_only_in_progress 4 0 abd_chunk_waste_size 4 10471936
July 28, 20241 yr Config looks OK, but try replacing you conf file with the one attached, in case there's an issue with it, rename it to zfs.conf and then reboot. zfs - 16G.conf
July 28, 20241 yr Author Hi JorgeB thanks you much. I do it, but nothing change root@nas:~# cat /proc/spl/kstat/zfs/arcstats | grep c_max c_max 4 4294967296 root@nas:~# cat /boot/config/modprobe.d/zfs.conf options zfs zfs_arc_max=16765034496 A mouth ago i change hw cpu + ram + mainboard. In previous installation i have only 16GB of ram, this can be a cause of this issue? Thank a lot
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