Here is the output for zfs-stats on slocum. This represents a 24 hour period. This server acts as my database server (MySQL and PostgreSQL), and runs bacula-dir, but does not store any backups locally. It also houses the dev copy of FreshPorts.
[dan@slocum:~] $ zfs-mon -baTI 86400 ZFS real-time cache activity monitor Seconds elapsed: 86400 Cache hits and misses: 1s 10s 60s tot ARC hits: 93 582 727 3266 ARC misses: 20 12 12 317 ARC demand data hits: 55 165 572 1941 ARC demand data misses: 20 12 12 238 ARC demand metadata hits: 38 414 152 1021 ARC demand metadata misses: 0 0 0 35 ARC prefetch data hits: 0 2 2 226 ARC prefetch data misses: 0 0 0 30 ARC prefetch metadata hits: 0 1 1 78 ARC prefetch metadata misses: 0 0 0 14 ZFETCH hits: 294 801 1621 5386 ZFETCH misses: 43 690 489 1670 Cache efficiency percentage: 10s 60s tot ARC: 97.98 98.38 91.15 ARC demand data: 93.22 97.95 89.08 ARC demand metadata: 100.00 100.00 96.69 ARC prefetch data: 100.00 100.00 88.28 ARC prefetch metadata: 100.00 100.00 84.78 ZFETCH: 53.72 76.82 76.33 [dan@slocum:~] $