It'll run happily from within a jail so you can install it presistantly
It might show some useful stats - L2Arc Header, arc size, kernal mem. Here's mine - you can see I rebooted over the weekend so the L2Arc is not warmed up:
Code: Select all
jexec transmission /usr/local/bin/zfs-stats -a
------------------------------------------------------------------------
ZFS Subsystem Report Mon Nov 9 08:50:38 2015
------------------------------------------------------------------------
System Information:
Kernel Version: 1002000 (osreldate)
Hardware Platform: amd64
Processor Architecture: amd64
ZFS Storage pool Version: 5000
ZFS Filesystem Version: 5
FreeBSD 10.2-RELEASE-p5 #0 r288904M: Tue Oct 6 07:09:12 CEST 2015 root
8:50AM up 17:04, 0 users, load averages: 0.59, 1.15, 1.15
------------------------------------------------------------------------
System Memory:
1.03% 102.12 MiB Active, 5.78% 572.67 MiB Inact
89.71% 8.69 GiB Wired, 0.04% 4.42 MiB Cache
3.43% 340.50 MiB Free, 0.00% 4.00 KiB Gap
Real Installed: 10.00 GiB
Real Available: 99.49% 9.95 GiB
Real Managed: 97.31% 9.68 GiB
Logical Total: 10.00 GiB
Logical Used: 91.04% 9.10 GiB
Logical Free: 8.96% 917.59 MiB
Kernel Memory: 337.28 MiB
Data: 90.24% 304.37 MiB
Text: 9.76% 32.91 MiB
Kernel Memory Map: 9.00 GiB
Size: 69.43% 6.25 GiB
Free: 30.57% 2.75 GiB
------------------------------------------------------------------------
ARC Summary: (HEALTHY)
Memory Throttle Count: 0
ARC Misc:
Deleted: 1.17m
Recycle Misses: 735.18k
Mutex Misses: 806
Evict Skips: 43.94m
ARC Size: 88.93% 7.11 GiB
Target Size: (Adaptive) 88.93% 7.11 GiB
Min Size (Hard Limit): 50.00% 4.00 GiB
Max Size (High Water): 2:1 8.00 GiB
ARC Size Breakdown:
Recently Used Cache Size: 93.75% 6.67 GiB
Frequently Used Cache Size: 6.25% 455.41 MiB
ARC Hash Breakdown:
Elements Max: 753.91k
Elements Current: 99.86% 752.87k
Collisions: 541.88k
Chain Max: 6
Chains: 106.78k
------------------------------------------------------------------------
ARC Efficiency: 32.04m
Cache Hit Ratio: 86.14% 27.60m
Cache Miss Ratio: 13.86% 4.44m
Actual Hit Ratio: 76.84% 24.61m
Data Demand Efficiency: 96.24% 4.65m
Data Prefetch Efficiency: 11.49% 1.06m
CACHE HITS BY CACHE LIST:
Anonymously Used: 5.05% 1.39m
Most Recently Used: 9.31% 2.57m
Most Frequently Used: 79.88% 22.04m
Most Recently Used Ghost: 1.25% 346.09k
Most Frequently Used Ghost: 4.50% 1.24m
CACHE HITS BY DATA TYPE:
Demand Data: 16.21% 4.47m
Prefetch Data: 0.44% 122.11k
Demand Metadata: 72.85% 20.10m
Prefetch Metadata: 10.49% 2.90m
CACHE MISSES BY DATA TYPE:
Demand Data: 3.94% 174.72k
Prefetch Data: 21.19% 940.65k
Demand Metadata: 65.02% 2.89m
Prefetch Metadata: 9.86% 437.65k
------------------------------------------------------------------------
L2 ARC Summary: (HEALTHY)
Passed Headroom: 3.87m
Tried Lock Failures: 31.00k
IO In Progress: 190
Low Memory Aborts: 19
Free on Write: 14.70k
Writes While Full: 2.90k
R/W Clashes: 48
Bad Checksums: 0
IO Errors: 0
SPA Mismatch: 158.93k
L2 ARC Size: (Adaptive) 49.72 GiB
Header Size: 0.17% 87.81 MiB
L2 ARC Breakdown: 4.44m
Hit Ratio: 26.14% 1.16m
Miss Ratio: 73.86% 3.28m
Feeds: 64.61k
L2 ARC Buffer:
Bytes Scanned: 4.47 TiB
Buffer Iterations: 64.61k
List Iterations: 4.10m
NULL List Iterations: 28.22k
L2 ARC Writes:
Writes Sent: 100.00% 19.38k
------------------------------------------------------------------------
File-Level Prefetch: (HEALTHY)
DMU Efficiency: 50.60m
Hit Ratio: 44.14% 22.33m
Miss Ratio: 55.86% 28.26m
Colinear: 28.26m
Hit Ratio: 0.01% 3.98k
Miss Ratio: 99.99% 28.26m
Stride: 21.10m
Hit Ratio: 99.95% 21.09m
Miss Ratio: 0.05% 10.33k
DMU Misc:
Reclaim: 28.26m
Successes: 0.41% 116.96k
Failures: 99.59% 28.14m
Streams: 1.24m
+Resets: 0.20% 2.48k
-Resets: 99.80% 1.24m
Bogus: 0
------------------------------------------------------------------------
VDEV cache is disabled
------------------------------------------------------------------------
ZFS Tunables (sysctl):
kern.maxusers 972
vm.kmem_size 9663676416
vm.kmem_size_scale 1
vm.kmem_size_min 0
vm.kmem_size_max 1319413950874
vfs.zfs.trim.max_interval 1
vfs.zfs.trim.timeout 30
vfs.zfs.trim.txg_delay 32
vfs.zfs.trim.enabled 1
vfs.zfs.vol.unmap_enabled 1
vfs.zfs.vol.mode 1
vfs.zfs.version.zpl 5
vfs.zfs.version.spa 5000
vfs.zfs.version.acl 1
vfs.zfs.version.ioctl 4
vfs.zfs.debug 0
vfs.zfs.super_owner 0
vfs.zfs.sync_pass_rewrite 2
vfs.zfs.sync_pass_dont_compress 5
vfs.zfs.sync_pass_deferred_free 2
vfs.zfs.zio.exclude_metadata 0
vfs.zfs.zio.use_uma 1
vfs.zfs.cache_flush_disable 0
vfs.zfs.zil_replay_disable 0
vfs.zfs.min_auto_ashift 9
vfs.zfs.max_auto_ashift 13
vfs.zfs.vdev.trim_max_pending 10000
vfs.zfs.vdev.bio_delete_disable 0
vfs.zfs.vdev.bio_flush_disable 0
vfs.zfs.vdev.write_gap_limit 4096
vfs.zfs.vdev.read_gap_limit 32768
vfs.zfs.vdev.aggregation_limit 131072
vfs.zfs.vdev.trim_max_active 64
vfs.zfs.vdev.trim_min_active 1
vfs.zfs.vdev.scrub_max_active 2
vfs.zfs.vdev.scrub_min_active 1
vfs.zfs.vdev.async_write_max_active 10
vfs.zfs.vdev.async_write_min_active 1
vfs.zfs.vdev.async_read_max_active 3
vfs.zfs.vdev.async_read_min_active 1
vfs.zfs.vdev.sync_write_max_active 10
vfs.zfs.vdev.sync_write_min_active 10
vfs.zfs.vdev.sync_read_max_active 10
vfs.zfs.vdev.sync_read_min_active 10
vfs.zfs.vdev.max_active 1000
vfs.zfs.vdev.async_write_active_max_dirty_percent60
vfs.zfs.vdev.async_write_active_min_dirty_percent30
vfs.zfs.vdev.mirror.non_rotating_seek_inc1
vfs.zfs.vdev.mirror.non_rotating_inc 0
vfs.zfs.vdev.mirror.rotating_seek_offset1048576
vfs.zfs.vdev.mirror.rotating_seek_inc 5
vfs.zfs.vdev.mirror.rotating_inc 0
vfs.zfs.vdev.trim_on_init 1
vfs.zfs.vdev.cache.bshift 16
vfs.zfs.vdev.cache.size 0
vfs.zfs.vdev.cache.max 16384
vfs.zfs.vdev.metaslabs_per_vdev 200
vfs.zfs.txg.timeout 5
vfs.zfs.space_map_blksz 4096
vfs.zfs.spa_slop_shift 5
vfs.zfs.spa_asize_inflation 24
vfs.zfs.deadman_enabled 1
vfs.zfs.deadman_checktime_ms 5000
vfs.zfs.deadman_synctime_ms 1000000
vfs.zfs.recover 0
vfs.zfs.spa_load_verify_data 1
vfs.zfs.spa_load_verify_metadata 1
vfs.zfs.spa_load_verify_maxinflight 10000
vfs.zfs.check_hostid 1
vfs.zfs.mg_fragmentation_threshold 85
vfs.zfs.mg_noalloc_threshold 0
vfs.zfs.condense_pct 200
vfs.zfs.metaslab.bias_enabled 1
vfs.zfs.metaslab.lba_weighting_enabled 1
vfs.zfs.metaslab.fragmentation_factor_enabled1
vfs.zfs.metaslab.preload_enabled 1
vfs.zfs.metaslab.preload_limit 3
vfs.zfs.metaslab.unload_delay 8
vfs.zfs.metaslab.load_pct 50
vfs.zfs.metaslab.min_alloc_size 33554432
vfs.zfs.metaslab.df_free_pct 4
vfs.zfs.metaslab.df_alloc_threshold 131072
vfs.zfs.metaslab.debug_unload 0
vfs.zfs.metaslab.debug_load 0
vfs.zfs.metaslab.fragmentation_threshold70
vfs.zfs.metaslab.gang_bang 16777217
vfs.zfs.free_max_blocks -1
vfs.zfs.no_scrub_prefetch 0
vfs.zfs.no_scrub_io 0
vfs.zfs.resilver_min_time_ms 3000
vfs.zfs.free_min_time_ms 1000
vfs.zfs.scan_min_time_ms 1000
vfs.zfs.scan_idle 50
vfs.zfs.scrub_delay 4
vfs.zfs.resilver_delay 2
vfs.zfs.top_maxinflight 32
vfs.zfs.zfetch.array_rd_sz 1048576
vfs.zfs.zfetch.block_cap 256
vfs.zfs.zfetch.min_sec_reap 2
vfs.zfs.zfetch.max_streams 8
vfs.zfs.prefetch_disable 0
vfs.zfs.delay_scale 500000
vfs.zfs.delay_min_dirty_percent 60
vfs.zfs.dirty_data_sync 67108864
vfs.zfs.dirty_data_max_percent 10
vfs.zfs.dirty_data_max_max 4294967296
vfs.zfs.dirty_data_max 1068311347
vfs.zfs.max_recordsize 1048576
vfs.zfs.mdcomp_disable 0
vfs.zfs.nopwrite_enabled 1
vfs.zfs.dedup.prefetch 1
vfs.zfs.l2c_only_size 47187566080
vfs.zfs.mfu_ghost_data_lsize 4388028416
vfs.zfs.mfu_ghost_metadata_lsize 923637248
vfs.zfs.mfu_ghost_size 5311665664
vfs.zfs.mfu_data_lsize 1004780544
vfs.zfs.mfu_metadata_lsize 161688576
vfs.zfs.mfu_size 1299322880
vfs.zfs.mru_ghost_data_lsize 1807180288
vfs.zfs.mru_ghost_metadata_lsize 516296704
vfs.zfs.mru_ghost_size 2323476992
vfs.zfs.mru_data_lsize 4616723456
vfs.zfs.mru_metadata_lsize 595258880
vfs.zfs.mru_size 5313526272
vfs.zfs.anon_data_lsize 0
vfs.zfs.anon_metadata_lsize 0
vfs.zfs.anon_size 3194880
vfs.zfs.l2arc_norw 1
vfs.zfs.l2arc_feed_again 1
vfs.zfs.l2arc_noprefetch 1
vfs.zfs.l2arc_feed_min_ms 200
vfs.zfs.l2arc_feed_secs 1
vfs.zfs.l2arc_headroom 2
vfs.zfs.l2arc_write_boost 8388608
vfs.zfs.l2arc_write_max 8388608
vfs.zfs.arc_meta_limit 2147483648
vfs.zfs.arc_free_target 17644
vfs.zfs.arc_shrink_shift 5
vfs.zfs.arc_average_blocksize 8192
vfs.zfs.arc_min 4294967296
vfs.zfs.arc_max 8589934592
------------------------------------------------------------------------
