С хостинга думаю будет более интересно, чем с офисного сервера.
root@www1:~ # zfs-stats -EZ ------------------------------------------------------------------------ ZFS Subsystem Report Sun Apr 13 17:04:30 2014 ------------------------------------------------------------------------ ARC Efficiency: 71.69m Cache Hit Ratio: 99.82% 71.55m Cache Miss Ratio: 0.18% 132.39k Actual Hit Ratio: 99.38% 71.24m Data Demand Efficiency: 99.96% 60.96m Data Prefetch Efficiency: 45.31% 6.98k CACHE HITS BY CACHE LIST: Anonymously Used: 0.44% 315.12k Most Recently Used: 2.79% 2.00m Most Frequently Used: 96.77% 69.24m Most Recently Used Ghost: 0.00% 10 Most Frequently Used Ghost: 0.00% 72 CACHE HITS BY DATA TYPE: Demand Data: 85.16% 60.94m Prefetch Data: 0.00% 3.16k Demand Metadata: 14.40% 10.30m Prefetch Metadata: 0.44% 312.05k CACHE MISSES BY DATA TYPE: Demand Data: 18.32% 24.25k Prefetch Data: 2.88% 3.82k Demand Metadata: 56.28% 74.51k Prefetch Metadata: 22.52% 29.82k ------------------------------------------------------------------------ File-Level Prefetch: (HEALTHY) DMU Efficiency: 2.60b Hit Ratio: 97.79% 2.54b Miss Ratio: 2.21% 57.43m Colinear: 57.43m Hit Ratio: 0.01% 5.48k Miss Ratio: 99.99% 57.42m Stride: 2.54b Hit Ratio: 100.00% 2.54b Miss Ratio: 0.00% 9 DMU Misc: Reclaim: 57.42m Successes: 0.37% 211.08k Failures: 99.63% 57.21m Streams: 243.09k +Resets: 0.01% 29 -Resets: 99.99% 243.06k Bogus: 0 ------------------------------------------------------------------------
