Untuk membangun jawaban Michael Kjörling, Anda juga dapat menggunakan arc_summary.py .
Di sini Anda dapat melihat bagaimana ARC menggunakan setengah dari memori desktop saya:
root @ host: ~ # free -g
total yang digunakan buffer bersama gratis di-cache
Mem: 62 56 6 1 1 5
- / + buffer / cache: 49 13
Tukar: 7 0 7
root @ host: ~ # arc_summary.py
-------------------------------------------------- ----------------------
Laporan Subsistem ZFS Jum 24 Feb 19:44:20 2017
Ringkasan ARC: (SEHAT)
Jumlah Memori Throttle: 0
Misc ARC:
Dihapus: 1,33 m
Kehilangan Mutex: 99
Dikeluarkan Loncatan: 99
Ukuran ARC: 98,13% 30,80 GiB
Ukuran Target: (Adaptif) 100,00% 31,39 GiB
Ukuran Min (Batas Keras): 0,10% 32,00 MiB
Ukuran Maks (Tinggi Air): 1004: 1 31,39 GiB
Rincian Ukuran ARC:
Ukuran Cache yang Terakhir Digunakan: 84,25% 26,45 GiB
Ukuran Cache yang Sering Digunakan: 15.75% 4.95 GiB
ARC Hash Breakdown:
Elemen Maks: 1.11m
Elemen Saat Ini: 53.48% 592.56k
Tabrakan: 763.42k
Chain Max: 4
Rantai: 19.62k
ARC Total akses: 36,34 m
Rasio Hit Cache: 87,02% 31,62 m
Rasio Cache Miss: 12,98% 4,72m
Rasio Hit Aktual: 84,78% 30,81 juta
Efisiensi Permintaan Data: 93,49% 24,22 m
Efisiensi Prefetch Data: 2.57% 819.12k
CACHE HITS DENGAN DAFTAR CACHE:
Digunakan secara anonim: 2.27% 716.60k
Terakhir Digunakan: 17,26% 5,46 m
Paling Sering Digunakan: 80,17% 25,35 m
Hantu Terbaru Digunakan: 0,19% 60,25k
Hantu Paling Sering Digunakan: 0,11% 35,37k
CACH HITS BY TYPE DATA:
Data Permintaan: 71,60% 22,64m
Data Prefetch: 0,07% 21,04k
Metadata Permintaan: 25,82% 8,16m
Prefetch Metadata: 2.51% 794.39k
CISSE HILANG OLEH JENIS DATA:
Data Permintaan: 33,44% 1,58 juta
Data Prefetch: 16,92% 798,09k
Metadata Permintaan: 48,90% 2,31 juta
Prefetch Metadata: 0,75% 35,27k
Efisiensi Prefetch DMU: 173,06 m
Rasio Hit: 86,14% 149,07 juta
Rasio Kehilangan: 13,86% 23,99 juta
ZFS Tunable:
metaslab_debug_load 0
zfs_arc_min_prefetch_lifespan 0
zfetch_max_streams 8
zfs_nopwrite_enabled 1
zfetch_min_sec_reap 2
zfs_dbgmsg_enable 0
zfs_dirty_data_max_max_percent 25
zfs_arc_p_aggressive_disable 1
spa_load_verify_data 1
zfs_zevent_cols 80
zfs_dirty_data_max_percent 10
zfs_sync_pass_dont_compress 5
l2arc_write_max 8388608
zfs_vdev_scrub_max_active 2
zfs_vdev_sync_write_min_active 10
zvol_prefetch_bytes 131072
metaslab_aliquot 524288
zfs_no_scrub_prefetch 0
zfs_arc_shrink_shift 0
zfetch_block_cap 256
zfs_txg_history 0
zfs_delay_scale 500000
zfs_vdev_async_write_active_min_dirty_percent 30
metaslab_debug_unload 0
zfs_read_history 0
zvol_max_discard_blocks 16384
zfs_recover 0
l2arc_headroom 2
zfs_deadman_synctime_ms 1000000
zfs_scan_idle 50
zfs_free_min_time_ms 1000
zfs_dirty_data_max 6741298790
zfs_vdev_async_read_min_active 1
zfs_mg_noalloc_threshold 0
zfs_dedup_prefetch 0
zfs_vdev_max_active 1000
l2arc_write_boost 8388608
zfs_resilver_min_time_ms 3000
zfs_vdev_async_write_max_active 10
zil_slog_limit 1048576
zfs_prefetch_disable 0
zfs_resilver_delay 2
metaslab_lba_weighting_enabled 1
zfs_mg_fragmentation_threshold 85
l2arc_feed_again 1
zfs_zevent_console 0
zfs_immediate_write_sz 32768
zfs_dbgmsg_maxsize 4194304
zfs_free_leak_on_eio 0
zfs_deadman_enabled 1
metaslab_bias_enabled 1
zfs_arc_p_dampener_disable 1
zfs_object_mutex_size 64
zfs_metaslab_fragmentation_threshold 70
zfs_no_scrub_io 0
metaslabs_per_vdev 200
zfs_dbuf_state_index 0
zfs_vdev_sync_read_min_active 10
metaslab_fragmentation_factor_enabled 1
zvol_inhibit_dev 0
zfs_vdev_async_write_active_max_dirty_percent 60
zfs_vdev_cache_size 0
zfs_vdev_mirror_switch_us 10000
zfs_dirty_data_sync 67108864
spa_config_path /etc/zfs/zpool.cache
zfs_dirty_data_max_max 16853246976
zfs_arc_lotsfree_percent 10
zfs_zevent_len_max 128
zfs_scan_min_time_ms 1000
zfs_arc_sys_free 0
zfs_arc_meta_strategy 1
zfs_vdev_cache_bshift 16
zfs_arc_meta_adjust_restarts 4096
zfs_max_recordsize 1048576
zfs_vdev_scrub_min_active 1
zfs_vdev_read_gap_limit 32768
zfs_arc_meta_limit 0
zfs_vdev_sync_write_max_active 10
l2arc_norw 0
zfs_arc_meta_prune 10000
metaslab_preload_enabled 1
l2arc_nocompress 0
zvol_major 230
zfs_vdev_aggregation_limit 131072
zfs_flags 0
spa_asize_inflation 24
zfs_admin_snapshot 0
l2arc_feed_secs 1
zio_taskq_batch_pct 75
zfs_sync_pass_deferred_free 2
zfs_disable_dup_eviction 0
zfs_arc_grow_retry 0
zfs_read_history_hits 0
zfs_vdev_async_write_min_active 1
zfs_vdev_async_read_max_active 3
zfs_scrub_delay 4
zfs_delay_min_dirty_percent 60
zfs_free_max_blocks 100000
zfs_vdev_cache_max 16384
zio_delay_max 30000
zfs_top_maxinflight 32
ign_hole_birth 1
spa_slop_shift 5
zfs_vdev_write_gap_limit 4096
spa_load_verify_metadata 1
spa_load_verify_maxinflight 10000
l2arc_noprefetch 1
zfs_vdev_scheduler noop
zfs_expire_snapshot 300
zfs_sync_pass_rewrite 2
zil_replay_disable 0
zfs_nocacheflush 0
zfs_arc_max 0
zfs_arc_min 0
zfs_read_chunk_size 1048576
zfs_txg_timeout 5
zfs_pd_bytes_max 52428800
l2arc_headroom_boost 200
zfs_send_corrupt_data 0
l2arc_feed_min_ms 200
zfs_arc_meta_min 0
zfs_arc_average_blocksize 8192
zfetch_array_rd_sz 1048576
zfs_autoimport_disable 1
zfs_arc_p_min_shift 0
zio_requeue_io_start_cut_in_line 1
zfs_vdev_sync_read_max_active 10
zfs_mdcomp_disable 0
zfs_arc_num_sublists_per_state 8