revengineer
Contributor
- Joined
- Oct 27, 2019
- Messages
- 193
In the GUI, I am setting loader tunable vfs.zfs.arc_max to 30G. However, it seems that the arc size shown in the dashboard does not exceed 10G. I am showing the output of arc_summary below. (Sorry, I cannot figure out how to make this collapsible; it's not in the tool list.) Am I missing something? Help appreciated.
Code:
root@max[~]# arc_summary ------------------------------------------------------------------------ ZFS Subsystem Report Sun Jul 18 20:28:34 2021 FreeBSD 12.2-RELEASE-p6 zpl version 5 Machine: max.korthresearch.local (amd64) spa version 5000 ARC status: HEALTHY Memory throttle count: 0 ARC size (current): 100.1 % 10.0 GiB Target size (adaptive): 100.0 % 10.0 GiB Min size (hard limit): 27.5 % 2.7 GiB Max size (high water): 3:1 10.0 GiB Most Frequently Used (MFU) cache size: 23.5 % 2.1 GiB Most Recently Used (MRU) cache size: 76.5 % 6.7 GiB Metadata cache size (hard limit): 75.0 % 7.5 GiB Metadata cache size (current): 32.8 % 2.5 GiB Dnode cache size (hard limit): 10.0 % 768.0 MiB Dnode cache size (current): 80.3 % 616.4 MiB ARC hash breakdown: Elements max: 1.2M Elements current: 78.8 % 911.1k Collisions: 1.3M Chain max: 4 Chains: 23.9k ARC misc: Deleted: 16.1M Mutex misses: 308 Eviction skips: 277.3k ARC total accesses (hits + misses): 296.4M Cache hit ratio: 98.0 % 290.6M Cache miss ratio: 2.0 % 5.8M Actual hit ratio (MFU + MRU hits): 98.0 % 290.4M Data demand efficiency: 78.0 % 15.5M Data prefetch efficiency: 7.8 % 2.2M Cache hits by cache type: Most frequently used (MFU): 95.0 % 276.1M Most recently used (MRU): 4.9 % 14.3M Most frequently used (MFU) ghost: 0.1 % 386.2k Most recently used (MRU) ghost: 0.1 % 206.7k Cache hits by data type: Demand data: 4.2 % 12.1M Demand prefetch data: 0.1 % 174.5k Demand metadata: 95.7 % 278.2M Demand prefetch metadata: < 0.1 % 97.7k Cache misses by data type: Demand data: 58.5 % 3.4M Demand prefetch data: 35.5 % 2.1M Demand metadata: 4.1 % 237.5k Demand prefetch metadata: 1.9 % 113.6k DMU prefetch efficiency: 7.2M Hit ratio: 24.8 % 1.8M Miss ratio: 75.2 % 5.4M L2ARC not detected, skipping section Tunables: abd_chunk_size 4096 abd_scatter_enabled 1 allow_redacted_dataset_mount 0 anon_data_esize 0 anon_metadata_esize 0 anon_size 16506880 arc.average_blocksize 8192 arc.dnode_limit 0 arc.dnode_limit_percent 10 arc.dnode_reduce_percent 10 arc.evict_batch_limit 10 arc.eviction_pct 200 arc.grow_retry 0 arc.lotsfree_percent 10 arc.max 0 arc.meta_adjust_restarts 4096 arc.meta_limit 0 arc.meta_limit_percent 75 arc.meta_min 0 arc.meta_prune 10000 arc.meta_strategy 1 arc.min 0 arc.min_prefetch_ms 0 arc.min_prescient_prefetch_ms 0 arc.p_dampener_disable 1 arc.p_min_shift 0 arc.pc_percent 0 arc.shrink_shift 0 arc.sys_free 0 arc_free_target 478573 arc_max 0 arc_min 0 arc_no_grow_shift 5 async_block_max_blocks 18446744073709551615 autoimport_disable 1 ccw_retry_interval 300 checksum_events_per_second 20 commit_timeout_pct 5 compressed_arc_enabled 1 condense.indirect_commit_entry_delay_ms 0 condense.indirect_obsolete_pct 25 condense.indirect_vdevs_enable 1 condense.max_obsolete_bytes 1073741824 condense.min_mapping_bytes 131072 condense_pct 200 crypt_sessions 0 dbgmsg_enable 1 dbgmsg_maxsize 4194304 dbuf.cache_shift 5 dbuf.metadata_cache_max_bytes 18446744073709551615 dbuf.metadata_cache_shift 6 dbuf_cache.hiwater_pct 10 dbuf_cache.lowater_pct 10 dbuf_cache.max_bytes 18446744073709551615 dbuf_state_index 0 ddt_data_is_special 1 deadman.checktime_ms 60000 deadman.enabled 1 deadman.failmode wait deadman.synctime_ms 600000 deadman.ziotime_ms 300000 debug 0 debugflags 0 dedup.prefetch 0 default_bs 9 default_ibs 15 delay_min_dirty_percent 60 delay_scale 500000 dirty_data_max 4294967296 dirty_data_max_max 4294967296 dirty_data_max_max_percent 25 dirty_data_max_percent 10 dirty_data_sync_percent 20 disable_ivset_guid_check 0 dmu_object_alloc_chunk_shift 7 dmu_offset_next_sync 0 dmu_prefetch_max 134217728 dtl_sm_blksz 4096 flags 0 fletcher_4_impl [fastest] scalar superscalar superscalar4 sse2 ssse3 free_bpobj_enabled 1 free_leak_on_eio 0 free_min_time_ms 1000 history_output_max 1048576 immediate_write_sz 32768 initialize_chunk_size 1048576 initialize_value 16045690984833335022 keep_log_spacemaps_at_export 0 l2arc.feed_again 1 l2arc.feed_min_ms 200 l2arc.feed_secs 1 l2arc.headroom 2 l2arc.headroom_boost 200 l2arc.meta_percent 33 l2arc.mfuonly 0 l2arc.noprefetch 1 l2arc.norw 0 l2arc.rebuild_blocks_min_l2size 1073741824 l2arc.rebuild_enabled 0 l2arc.trim_ahead 0 l2arc.write_boost 8388608 l2arc.write_max 8388608 l2arc_feed_again 1 l2arc_feed_min_ms 200 l2arc_feed_secs 1 l2arc_headroom 2 l2arc_noprefetch 1 l2arc_norw 0 l2arc_write_boost 8388608 l2arc_write_max 8388608 l2c_only_size 0 livelist.condense.new_alloc 0 livelist.condense.sync_cancel 0 livelist.condense.sync_pause 0 livelist.condense.zthr_cancel 0 livelist.condense.zthr_pause 0 livelist.max_entries 500000 livelist.min_percent_shared 75 lua.max_instrlimit 100000000 lua.max_memlimit 104857600 max_async_dedup_frees 100000 max_auto_ashift 16 max_dataset_nesting 50 max_log_walking 5 max_logsm_summary_length 10 max_missing_tvds 0 max_missing_tvds_cachefile 2 max_missing_tvds_scan 0 max_nvlist_src_size 0 max_recordsize 1048576 metaslab.aliquot 524288 metaslab.bias_enabled 1 metaslab.debug_load 0 metaslab.debug_unload 0 metaslab.df_alloc_threshold 131072 metaslab.df_free_pct 4 metaslab.df_max_search 16777216 metaslab.df_use_largest_segment 0 metaslab.force_ganging 16777217 metaslab.fragmentation_factor_enabled 1 metaslab.fragmentation_threshold 70 metaslab.lba_weighting_enabled 1 metaslab.load_pct 50 metaslab.max_size_cache_sec 3600 metaslab.mem_limit 75 metaslab.preload_enabled 1 metaslab.preload_limit 10 metaslab.segment_weight_enabled 1 metaslab.sm_blksz_no_log 16384 metaslab.sm_blksz_with_log 131072 metaslab.switch_threshold 2 metaslab.unload_delay 32 metaslab.unload_delay_ms 600000 mfu_data_esize 1861031936 mfu_ghost_data_esize 2537873408 mfu_ghost_metadata_esize 897857024 mfu_ghost_size 3435730432 mfu_metadata_esize 33828864 mfu_size 2202412032 mg.fragmentation_threshold 95 mg.noalloc_threshold 0 min_auto_ashift 9 min_metaslabs_to_flush 1 mru_data_esize 5718893056 mru_ghost_data_esize 1717017600 mru_ghost_metadata_esize 1878866432 mru_ghost_size 3595884032 mru_metadata_esize 52778496 mru_size 7154395648 multihost.fail_intervals 10 multihost.history 0 multihost.import_intervals 20 multihost.interval 1000 multilist_num_sublists 0 no_scrub_io 0 no_scrub_prefetch 0 nocacheflush 0 nopwrite_enabled 1 obsolete_min_time_ms 500 pd_bytes_max 52428800 per_txg_dirty_frees_percent 5 prefetch.array_rd_sz 1048576 prefetch.disable 0 prefetch.max_distance 8388608 prefetch.max_idistance 67108864 prefetch.max_streams 8 prefetch.min_sec_reap 2 read_history 0 read_history_hits 0 rebuild_max_segment 1048576 reconstruct.indirect_combinations_max 4096 recover 0 recv.queue_ff 20 recv.queue_length 16777216 recv.write_batch_size 1048576 reference_tracking_enable 0 removal_suspend_progress 0 remove_max_segment 16777216 resilver_disable_defer 0 resilver_min_time_ms 3000 scan_checkpoint_intval 7200 scan_fill_weight 3 scan_ignore_errors 0 scan_issue_strategy 0 scan_legacy 0 scan_max_ext_gap 2097152 scan_mem_lim_fact 20 scan_mem_lim_soft_fact 20 scan_strict_mem_lim 0 scan_suspend_progress 0 scan_vdev_limit 4194304 scrub_min_time_ms 1000 send.corrupt_data 0 send.no_prefetch_queue_ff 20 send.no_prefetch_queue_length 1048576 send.override_estimate_recordsize 0 send.queue_ff 20 send.queue_length 16777216 send.unmodified_spill_blocks 1 send_holes_without_birth_time 1 slow_io_events_per_second 20 spa.asize_inflation 24 spa.discard_memory_limit 16777216 spa.load_print_vdev_tree 0 spa.load_verify_data 1 spa.load_verify_metadata 1 spa.load_verify_shift 4 spa.slop_shift 5 space_map_ibs 14 special_class_metadata_reserve_pct 25 standard_sm_blksz 131072 super_owner 0 sync_pass_deferred_free 2 sync_pass_dont_compress 8 sync_pass_rewrite 2 sync_taskq_batch_pct 75 top_maxinflight 1000 traverse_indirect_prefetch_limit 32 trim.extent_bytes_max 134217728 trim.extent_bytes_min 32768 trim.metaslab_skip 0 trim.queue_limit 10 trim.txg_batch 32 txg.history 100 txg.timeout 5 unflushed_log_block_max 262144 unflushed_log_block_min 1000 unflushed_log_block_pct 400 unflushed_max_mem_amt 1073741824 unflushed_max_mem_ppm 1000 user_indirect_is_special 1 validate_skip 0 vdev.aggregate_trim 0 vdev.aggregation_limit 1048576 vdev.aggregation_limit_non_rotating 131072 vdev.async_read_max_active 3 vdev.async_read_min_active 1 vdev.async_write_active_max_dirty_percent 60 vdev.async_write_active_min_dirty_percent 30 vdev.async_write_max_active 5 vdev.async_write_min_active 1 vdev.bio_delete_disable 0 vdev.bio_flush_disable 0 vdev.cache_bshift 16 vdev.cache_max 16384 vdev.cache_size 0 vdev.def_queue_depth 32 vdev.default_ms_count 200 vdev.default_ms_shift 29 vdev.file.logical_ashift 9 vdev.file.physical_ashift 9 vdev.initializing_max_active 1 vdev.initializing_min_active 1 vdev.max_active 1000 vdev.max_auto_ashift 16 vdev.min_auto_ashift 9 vdev.min_ms_count 16 vdev.mirror.non_rotating_inc 0 vdev.mirror.non_rotating_seek_inc 1 vdev.mirror.rotating_inc 0 vdev.mirror.rotating_seek_inc 5 vdev.mirror.rotating_seek_offset 1048576 vdev.ms_count_limit 131072 vdev.nia_credit 5 vdev.nia_delay 5 vdev.queue_depth_pct 1000 vdev.read_gap_limit 32768 vdev.rebuild_max_active 3 vdev.rebuild_min_active 1 vdev.removal_ignore_errors 0 vdev.removal_max_active 2 vdev.removal_max_span 32768 vdev.removal_min_active 1 vdev.removal_suspend_progress 0 vdev.remove_max_segment 16777216 vdev.scrub_max_active 3 vdev.scrub_min_active 1 vdev.sync_read_max_active 10 vdev.sync_read_min_active 10 vdev.sync_write_max_active 10 vdev.sync_write_min_active 10 vdev.trim_max_active 2 vdev.trim_min_active 1 vdev.validate_skip 0 vdev.write_gap_limit 4096 version.acl 1 version.ioctl 15 version.module v2021052700-zfs_b4f504202869094d805defb3c5d7938116ba1226 version.spa 5000 version.zpl 5 vnops.read_chunk_size 1048576 vol.mode 2 vol.recursive 0 vol.unmap_enabled 1 zap_iterate_prefetch 1 zevent.cols 80 zevent.console 0 zevent.len_max 512 zevent.retain_expire_secs 900 zevent.retain_max 2000 zfetch.max_distance 8388608 zfetch.max_idistance 67108864 zil.clean_taskq_maxalloc 1048576 zil.clean_taskq_minalloc 1024 zil.clean_taskq_nthr_pct 100 zil.maxblocksize 131072 zil.nocacheflush 0 zil.replay_disable 0 zil.slog_bulk 786432 zio.deadman_log_all 0 zio.dva_throttle_enabled 1 zio.exclude_metadata 0 zio.requeue_io_start_cut_in_line 1 zio.slow_io_ms 30000 zio.taskq_batch_pct 80 zio.taskq_batch_tpq 0 zio.use_uma 1 VDEV cache disabled, skipping section ZIL committed transactions: 4.3M Commit requests: 94.2k Flushes to stable storage: 94.2k Transactions to SLOG storage pool: 0 Bytes 0 Transactions to non-SLOG storage pool: 83.9 GiB 765.3k