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- hbarta@oak:~$ free -mw
- total used free shared buffers cache available
- Mem: 16033 11402 2672 131 324 1633 4170
- Swap: 10177 52 10125
- hbarta@oak:~$ arc_summary
- ------------------------------------------------------------------------
- ZFS Subsystem Report Sun Mar 07 10:34:03 2021
- ARC Summary: (HEALTHY)
- Memory Throttle Count: 0
- ARC Misc:
- Deleted: 270.02M
- Mutex Misses: 39.10k
- Evict Skips: 275.48M
- ARC Size: 96.14% 7.53 GiB
- Target Size: (Adaptive) 100.00% 7.83 GiB
- Min Size (Hard Limit): 6.25% 501.04 MiB
- Max Size (High Water): 16:1 7.83 GiB
- ARC Size Breakdown:
- Recently Used Cache Size: 46.01% 2.88 GiB
- Frequently Used Cache Size: 53.99% 3.38 GiB
- ARC Hash Breakdown:
- Elements Max: 1.03M
- Elements Current: 49.86% 514.91k
- Collisions: 51.71M
- Chain Max: 7
- Chains: 52.97k
- ARC Total accesses: 898.59M
- Cache Hit Ratio: 80.00% 718.88M
- Cache Miss Ratio: 20.00% 179.71M
- Actual Hit Ratio: 78.27% 703.30M
- Data Demand Efficiency: 97.55% 141.74M
- Data Prefetch Efficiency: 0.09% 122.43M
- CACHE HITS BY CACHE LIST:
- Anonymously Used: 2.00% 14.41M
- Most Recently Used: 61.25% 440.30M
- Most Frequently Used: 36.58% 263.00M
- Most Recently Used Ghost: 0.14% 1.04M
- Most Frequently Used Ghost: 0.02% 139.65k
- CACHE HITS BY DATA TYPE:
- Demand Data: 19.23% 138.26M
- Prefetch Data: 0.01% 106.31k
- Demand Metadata: 77.98% 560.57M
- Prefetch Metadata: 2.77% 19.94M
- CACHE MISSES BY DATA TYPE:
- Demand Data: 1.94% 3.48M
- Prefetch Data: 68.07% 122.32M
- Demand Metadata: 21.82% 39.22M
- Prefetch Metadata: 8.17% 14.69M
- DMU Prefetch Efficiency: 488.15M
- Hit Ratio: 0.70% 3.41M
- Miss Ratio: 99.30% 484.75M
- ZFS Tunables:
- dbuf_cache_hiwater_pct 10
- dbuf_cache_lowater_pct 10
- dbuf_cache_max_bytes 104857600
- dbuf_cache_max_shift 5
- dmu_object_alloc_chunk_shift 7
- ignore_hole_birth 1
- l2arc_feed_again 1
- l2arc_feed_min_ms 200
- l2arc_feed_secs 1
- l2arc_headroom 2
- l2arc_headroom_boost 200
- l2arc_noprefetch 1
- l2arc_norw 0
- l2arc_write_boost 8388608
- l2arc_write_max 8388608
- metaslab_aliquot 524288
- metaslab_bias_enabled 1
- metaslab_debug_load 0
- metaslab_debug_unload 0
- metaslab_fragmentation_factor_enabled 1
- metaslab_lba_weighting_enabled 1
- metaslab_preload_enabled 1
- metaslabs_per_vdev 200
- send_holes_without_birth_time 1
- spa_asize_inflation 24
- spa_config_path /etc/zfs/zpool.cache
- spa_load_verify_data 1
- spa_load_verify_maxinflight 10000
- spa_load_verify_metadata 1
- spa_slop_shift 5
- zfetch_array_rd_sz 1048576
- zfetch_max_distance 8388608
- zfetch_max_streams 8
- zfetch_min_sec_reap 2
- zfs_abd_scatter_enabled 1
- zfs_abd_scatter_max_order 10
- zfs_admin_snapshot 1
- zfs_arc_average_blocksize 8192
- zfs_arc_dnode_limit 0
- zfs_arc_dnode_limit_percent 10
- zfs_arc_dnode_reduce_percent 10
- zfs_arc_grow_retry 0
- zfs_arc_lotsfree_percent 10
- zfs_arc_max 0
- zfs_arc_meta_adjust_restarts 4096
- zfs_arc_meta_limit 0
- zfs_arc_meta_limit_percent 75
- zfs_arc_meta_min 0
- zfs_arc_meta_prune 10000
- zfs_arc_meta_strategy 1
- zfs_arc_min 0
- zfs_arc_min_prefetch_lifespan 0
- zfs_arc_p_dampener_disable 1
- zfs_arc_p_min_shift 0
- zfs_arc_pc_percent 0
- zfs_arc_shrink_shift 0
- zfs_arc_sys_free 0
- zfs_autoimport_disable 1
- zfs_checksums_per_second 20
- zfs_compressed_arc_enabled 1
- zfs_dbgmsg_enable 0
- zfs_dbgmsg_maxsize 4194304
- zfs_dbuf_state_index 0
- zfs_deadman_checktime_ms 5000
- zfs_deadman_enabled 1
- zfs_deadman_synctime_ms 1000000
- zfs_dedup_prefetch 0
- zfs_delay_min_dirty_percent 60
- zfs_delay_scale 500000
- zfs_delays_per_second 20
- zfs_delete_blocks 20480
- zfs_dirty_data_max 1681217945
- zfs_dirty_data_max_max 4203044864
- zfs_dirty_data_max_max_percent 25
- zfs_dirty_data_max_percent 10
- zfs_dirty_data_sync 67108864
- zfs_dmu_offset_next_sync 0
- zfs_expire_snapshot 300
- zfs_flags 0
- zfs_free_bpobj_enabled 1
- zfs_free_leak_on_eio 0
- zfs_free_max_blocks 100000
- zfs_free_min_time_ms 1000
- zfs_immediate_write_sz 32768
- zfs_max_recordsize 1048576
- zfs_mdcomp_disable 0
- zfs_metaslab_fragmentation_threshold 70
- zfs_metaslab_segment_weight_enabled 1
- zfs_metaslab_switch_threshold 2
- zfs_mg_fragmentation_threshold 85
- zfs_mg_noalloc_threshold 0
- zfs_multihost_fail_intervals 5
- zfs_multihost_history 0
- zfs_multihost_import_intervals 10
- zfs_multihost_interval 1000
- zfs_multilist_num_sublists 0
- zfs_no_scrub_io 0
- zfs_no_scrub_prefetch 0
- zfs_nocacheflush 0
- zfs_nopwrite_enabled 1
- zfs_object_mutex_size 64
- zfs_pd_bytes_max 52428800
- zfs_per_txg_dirty_frees_percent 30
- zfs_prefetch_disable 0
- zfs_read_chunk_size 1048576
- zfs_read_history 0
- zfs_read_history_hits 0
- zfs_recover 0
- zfs_recv_queue_length 16777216
- zfs_resilver_delay 2
- zfs_resilver_min_time_ms 3000
- zfs_scan_idle 50
- zfs_scan_ignore_errors 0
- zfs_scan_min_time_ms 1000
- zfs_scrub_delay 4
- zfs_send_corrupt_data 0
- zfs_send_queue_length 16777216
- zfs_sync_pass_deferred_free 2
- zfs_sync_pass_dont_compress 5
- zfs_sync_pass_rewrite 2
- zfs_sync_taskq_batch_pct 75
- zfs_top_maxinflight 32
- zfs_txg_history 0
- zfs_txg_timeout 5
- zfs_vdev_aggregation_limit 131072
- zfs_vdev_async_read_max_active 3
- zfs_vdev_async_read_min_active 1
- zfs_vdev_async_write_active_max_dirty_percent 60
- zfs_vdev_async_write_active_min_dirty_percent 30
- zfs_vdev_async_write_max_active 10
- zfs_vdev_async_write_min_active 2
- zfs_vdev_cache_bshift 16
- zfs_vdev_cache_max 16384
- zfs_vdev_cache_size 0
- zfs_vdev_max_active 1000
- zfs_vdev_mirror_non_rotating_inc 0
- zfs_vdev_mirror_non_rotating_seek_inc 1
- zfs_vdev_mirror_rotating_inc 0
- zfs_vdev_mirror_rotating_seek_inc 5
- zfs_vdev_mirror_rotating_seek_offset 1048576
- zfs_vdev_queue_depth_pct 1000
- zfs_vdev_raidz_impl [fastest] original scalar
- zfs_vdev_read_gap_limit 32768
- zfs_vdev_scheduler noop
- zfs_vdev_scrub_max_active 2
- zfs_vdev_scrub_min_active 1
- zfs_vdev_sync_read_max_active 10
- zfs_vdev_sync_read_min_active 10
- zfs_vdev_sync_write_max_active 10
- zfs_vdev_sync_write_min_active 10
- zfs_vdev_write_gap_limit 4096
- zfs_zevent_cols 80
- zfs_zevent_console 0
- zfs_zevent_len_max 128
- zil_replay_disable 0
- zil_slog_bulk 786432
- zio_delay_max 30000
- zio_dva_throttle_enabled 1
- zio_requeue_io_start_cut_in_line 1
- zio_taskq_batch_pct 75
- zvol_inhibit_dev 0
- zvol_major 230
- zvol_max_discard_blocks 16384
- zvol_prefetch_bytes 131072
- zvol_request_sync 0
- zvol_threads 32
- zvol_volmode 1
- hbarta@oak:~$
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