After upgrading to Lion (10.7.1) a while ago I'm currently faced with a very poor performance of my system. It's a 2.2 GHz Core2Duo with 4 GB RAM and a 500GB HD. E.g. the JBoss6 AS needs about 5 minutes to start (compared to 1 minute before facing this problems), or after starting Safari and loading a page it's freezed about 5-10 seconds until the Flash animations are available.
I tried the XBench test and wondering about the Disk Tests [4K blocks, 256K blocks]:
Sequential Write: 49 MB/s, 12 MB/s Sequential Read: 0.8 MB/s, 10 MB/s Random Write: 0.8 MB/s, 9 MB/s Random Read: 0.1 MB/s, 7 MB/s
The throughput during read times seem to be extremely low. Can this be a problem with the HDD? (SMART status is
verified). iDefrag show fragmentations between 0.2% to 0.4% of volume content, but about 60% (catalog) to 70% (free space) of the volume directory.
Thread Test of XBench seems never to complete, the last entry is
Computation: 187.19 4.79 Mops/sec, 4 threads