Well, not quite, but look at the following: 118,342,689,824 bytes allocated in the heap 144,831,738,780 bytes copied during GC (scavenged) 335,086,064 bytes copied during GC (not scavenged) 255,257,516 bytes maximum residency (42 sample(s)) 222884 collections in generation 0 (3891.90s) 42 collections in generation 1 (153.99s) 536 Mb total memory in use INIT time 0.00s ( 0.00s elapsed) MUT time 233.66s (776.99s elapsed) GC time 4045.89s (4251.52s elapsed) EXIT time 0.00s ( 0.00s elapsed) Total time 4279.55s (5028.52s elapsed) %GC time 94.5% (84.5% elapsed) Alloc rate 506,470,897 bytes per MUT second Productivity 5.5% of total user, 4.6% of total elapsed Can anyone offer general suggestions for how to fix this! T. -- Dr Thomas Conway drtomc@gmail.com Silence is the perfectest herald of joy: I were but little happy, if I could say how much.