Late upgrade, but ARC compression works really well on my system with 48GB ram!
Code:
$top
last pid: 65443; load averages: 8.65, 8.56, 8.48 up 2+03:57:51 14:39:57
72 processes: 2 running, 70 sleeping
CPU: 97.8% user, 0.0% nice, 2.1% system, 0.1% interrupt, 0.0% idle
Mem: 1384M Active, 2527M Inact, 5642M Laundry, 36G Wired, 1288M Free
ARC: 32G Total, 21G MFU, 9545M MRU, 32K Anon, 289M Header, 1160M Other
30G Compressed, 91G Uncompressed, 3.08:1 Ratio
Swap: 8192M Total, 60M Used, 8132M Free