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zfs-stats -a (8GB RAM)

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Oct 12th, 2012
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  1. ------------------------------------------------------------------------
  2. ZFS Subsystem Report Sat Oct 13 00:15:50 2012
  3. ------------------------------------------------------------------------
  4.  
  5. System Information:
  6.  
  7. Kernel Version: 900044 (osreldate)
  8. Hardware Platform: amd64
  9. Processor Architecture: amd64
  10.  
  11. ZFS Storage pool Version: 28
  12. ZFS Filesystem Version: 5
  13.  
  14. FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12 02:52:29 UTC 2012 root
  15. 12:15AM up 10 days, 21:23, 1 user, load averages: 4.05, 3.84, 3.62
  16.  
  17. ------------------------------------------------------------------------
  18.  
  19. System Memory:
  20.  
  21. 0.29% 22.98 MiB Active, 37.65% 2.91 GiB Inact
  22. 57.00% 4.41 GiB Wired, 4.23% 335.02 MiB Cache
  23. 0.81% 63.75 MiB Free, 0.02% 1.51 MiB Gap
  24.  
  25. Real Installed: 8.00 GiB
  26. Real Available: 99.75% 7.98 GiB
  27. Real Managed: 96.87% 7.73 GiB
  28.  
  29. Logical Total: 8.00 GiB
  30. Logical Used: 58.75% 4.70 GiB
  31. Logical Free: 41.25% 3.30 GiB
  32.  
  33. Kernel Memory: 2.58 GiB
  34. Data: 99.25% 2.56 GiB
  35. Text: 0.75% 19.95 MiB
  36.  
  37. Kernel Memory Map: 4.51 GiB
  38. Size: 50.20% 2.26 GiB
  39. Free: 49.80% 2.25 GiB
  40.  
  41. ------------------------------------------------------------------------
  42.  
  43. ARC Summary: (THROTTLED)
  44. Memory Throttle Count: 6.94k
  45.  
  46. ARC Misc:
  47. Deleted: 19.84m
  48. Recycle Misses: 3.17m
  49. Mutex Misses: 108.39k
  50. Evict Skips: 349.62m
  51.  
  52. ARC Size: 43.26% 2.91 GiB
  53. Target Size: (Adaptive) 43.26% 2.91 GiB
  54. Min Size (Hard Limit): 12.50% 861.44 MiB
  55. Max Size (High Water): 8:1 6.73 GiB
  56.  
  57. ARC Size Breakdown:
  58. Recently Used Cache Size: 93.75% 2.73 GiB
  59. Frequently Used Cache Size: 6.25% 186.37 MiB
  60.  
  61. ARC Hash Breakdown:
  62. Elements Max: 1.39m
  63. Elements Current: 94.64% 1.31m
  64. Collisions: 23.20m
  65. Chain Max: 36
  66. Chains: 130.99k
  67.  
  68. ------------------------------------------------------------------------
  69.  
  70. ARC Efficiency: 236.61m
  71. Cache Hit Ratio: 95.09% 225.01m
  72. Cache Miss Ratio: 4.91% 11.61m
  73. Actual Hit Ratio: 82.17% 194.42m
  74.  
  75. Data Demand Efficiency: 98.98% 88.72m
  76. Data Prefetch Efficiency: 40.82% 9.39m
  77.  
  78. CACHE HITS BY CACHE LIST:
  79. Anonymously Used: 12.83% 28.86m
  80. Most Recently Used: 9.26% 20.85m
  81. Most Frequently Used: 77.14% 173.57m
  82. Most Recently Used Ghost: 0.27% 610.76k
  83. Most Frequently Used Ghost: 0.50% 1.12m
  84.  
  85. CACHE HITS BY DATA TYPE:
  86. Demand Data: 39.03% 87.82m
  87. Prefetch Data: 1.70% 3.83m
  88. Demand Metadata: 42.92% 96.57m
  89. Prefetch Metadata: 16.35% 36.79m
  90.  
  91. CACHE MISSES BY DATA TYPE:
  92. Demand Data: 7.79% 903.88k
  93. Prefetch Data: 47.87% 5.56m
  94. Demand Metadata: 12.99% 1.51m
  95. Prefetch Metadata: 31.35% 3.64m
  96.  
  97. ------------------------------------------------------------------------
  98.  
  99. L2 ARC Summary: (HEALTHY)
  100. Passed Headroom: 32.33m
  101. Tried Lock Failures: 791.68k
  102. IO In Progress: 4.38k
  103. Low Memory Aborts: 317
  104. Free on Write: 139.46k
  105. Writes While Full: 87.41k
  106. R/W Clashes: 393
  107. Bad Checksums: 0
  108. IO Errors: 0
  109. SPA Mismatch: 2.71b
  110.  
  111. L2 ARC Size: (Adaptive) 116.17 GiB
  112. Header Size: 0.19% 222.59 MiB
  113.  
  114. L2 ARC Evicts:
  115. Lock Retries: 495
  116. Upon Reading: 1
  117.  
  118. L2 ARC Breakdown: 11.61m
  119. Hit Ratio: 29.42% 3.41m
  120. Miss Ratio: 70.58% 8.19m
  121. Feeds: 1.03m
  122.  
  123. L2 ARC Buffer:
  124. Bytes Scanned: 608.86 TiB
  125. Buffer Iterations: 1.03m
  126. List Iterations: 64.89m
  127. NULL List Iterations: 4.36m
  128.  
  129. L2 ARC Writes:
  130. Writes Sent: 100.00% 206.63k
  131.  
  132. ------------------------------------------------------------------------
  133.  
  134. File-Level Prefetch: (HEALTHY)
  135.  
  136. DMU Efficiency: 1.17b
  137. Hit Ratio: 95.38% 1.11b
  138. Miss Ratio: 4.62% 53.95m
  139.  
  140. Colinear: 53.95m
  141. Hit Ratio: 0.01% 7.66k
  142. Miss Ratio: 99.99% 53.94m
  143.  
  144. Stride: 1.10b
  145. Hit Ratio: 99.94% 1.10b
  146. Miss Ratio: 0.06% 680.27k
  147.  
  148. DMU Misc:
  149. Reclaim: 53.94m
  150. Successes: 1.65% 892.18k
  151. Failures: 98.35% 53.05m
  152.  
  153. Streams: 10.50m
  154. +Resets: 0.16% 16.55k
  155. -Resets: 99.84% 10.49m
  156. Bogus: 0
  157.  
  158. ------------------------------------------------------------------------
  159.  
  160. VDEV cache is disabled
  161.  
  162. ------------------------------------------------------------------------
  163.  
  164. ZFS Tunables (sysctl):
  165. kern.maxusers 384
  166. vm.kmem_size 8300052480
  167. vm.kmem_size_scale 1
  168. vm.kmem_size_min 0
  169. vm.kmem_size_max 329853485875
  170. vfs.zfs.l2c_only_size 123884079616
  171. vfs.zfs.mfu_ghost_data_lsize 0
  172. vfs.zfs.mfu_ghost_metadata_lsize 2379774976
  173. vfs.zfs.mfu_ghost_size 2379774976
  174. vfs.zfs.mfu_data_lsize 16384
  175. vfs.zfs.mfu_metadata_lsize 3503104
  176. vfs.zfs.mfu_size 19516416
  177. vfs.zfs.mru_ghost_data_lsize 24903680
  178. vfs.zfs.mru_ghost_metadata_lsize 721504256
  179. vfs.zfs.mru_ghost_size 746407936
  180. vfs.zfs.mru_data_lsize 1163531776
  181. vfs.zfs.mru_metadata_lsize 1147425280
  182. vfs.zfs.mru_size 2376912896
  183. vfs.zfs.anon_data_lsize 0
  184. vfs.zfs.anon_metadata_lsize 0
  185. vfs.zfs.anon_size 2953216
  186. vfs.zfs.l2arc_norw 1
  187. vfs.zfs.l2arc_feed_again 1
  188. vfs.zfs.l2arc_noprefetch 0
  189. vfs.zfs.l2arc_feed_min_ms 200
  190. vfs.zfs.l2arc_feed_secs 1
  191. vfs.zfs.l2arc_headroom 2
  192. vfs.zfs.l2arc_write_boost 8388608
  193. vfs.zfs.l2arc_write_max 8388608
  194. vfs.zfs.arc_meta_limit 1806577664
  195. vfs.zfs.arc_meta_used 1962985000
  196. vfs.zfs.arc_min 903288832
  197. vfs.zfs.arc_max 7226310656
  198. vfs.zfs.dedup.prefetch 1
  199. vfs.zfs.mdcomp_disable 0
  200. vfs.zfs.write_limit_override 0
  201. vfs.zfs.write_limit_inflated 25704972288
  202. vfs.zfs.write_limit_max 1071040512
  203. vfs.zfs.write_limit_min 33554432
  204. vfs.zfs.write_limit_shift 3
  205. vfs.zfs.no_write_throttle 0
  206. vfs.zfs.zfetch.array_rd_sz 1048576
  207. vfs.zfs.zfetch.block_cap 256
  208. vfs.zfs.zfetch.min_sec_reap 2
  209. vfs.zfs.zfetch.max_streams 8
  210. vfs.zfs.prefetch_disable 0
  211. vfs.zfs.mg_alloc_failures 8
  212. vfs.zfs.check_hostid 1
  213. vfs.zfs.recover 0
  214. vfs.zfs.txg.synctime_ms 1000
  215. vfs.zfs.txg.timeout 5
  216. vfs.zfs.scrub_limit 10
  217. vfs.zfs.vdev.cache.bshift 16
  218. vfs.zfs.vdev.cache.size 0
  219. vfs.zfs.vdev.cache.max 16384
  220. vfs.zfs.vdev.write_gap_limit 4096
  221. vfs.zfs.vdev.read_gap_limit 32768
  222. vfs.zfs.vdev.aggregation_limit 131072
  223. vfs.zfs.vdev.ramp_rate 2
  224. vfs.zfs.vdev.time_shift 6
  225. vfs.zfs.vdev.min_pending 4
  226. vfs.zfs.vdev.max_pending 10
  227. vfs.zfs.vdev.bio_flush_disable 0
  228. vfs.zfs.cache_flush_disable 0
  229. vfs.zfs.zil_replay_disable 0
  230. vfs.zfs.zio.use_uma 0
  231. vfs.zfs.version.zpl 5
  232. vfs.zfs.version.spa 28
  233. vfs.zfs.version.acl 1
  234. vfs.zfs.debug 0
  235. vfs.zfs.super_owner 0
  236.  
  237. ------------------------------------------------------------------------
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