Hello,

Thanks for your help.

Here is a result of the command 'jmap -heap', could you help me to interpret 
this result, and to optimize my parameters?

Best Regards,
Jerome.

Attaching to process ID 11776, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 1.5.0_11-b03

using parallel threads in the new generation.
using thread-local object allocation.
Mark Sweep Compact GC

Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize      = 2147483648 (2048.0MB)
   NewSize          = 2686976 (2.5625MB)
   MaxNewSize       = -65536 (-0.0625MB)
   OldSize          = 1835008 (1.75MB)
   NewRatio         = 2
   SurvivorRatio    = 8
   PermSize         = 21757952 (20.75MB)
   MaxPermSize      = 134217728 (128.0MB)

Heap Usage:
New Generation (Eden + 1 Survivor Space):
   capacity = 644218880 (614.375MB)
   used     = 581578344 (554.6363296508789MB)
   free     = 62640536 (59.738670349121094MB)
   90.27651347318476% used
Eden Space:
   capacity = 572653568 (546.125MB)
   used     = 572344744 (545.8304824829102MB)
   free     = 308824 (0.29451751708984375MB)
   99.94607140909318% used
>From Space:
   capacity = 71565312 (68.25MB)
   used     = 9233600 (8.80584716796875MB)
   free     = 62331712 (59.44415283203125MB)
   12.902340172847985% used
To Space:
   capacity = 71565312 (68.25MB)
   used     = 0 (0.0MB)
   free     = 71565312 (68.25MB)
   0.0% used
tenured generation:
   capacity = 1431699456 (1365.375MB)
   used     = 254001848 (242.23503875732422MB)
   free     = 1177697608 (1123.1399612426758MB)
   17.741282706752667% used
Perm Generation:
   capacity = 80216064 (76.5MB)
   used     = 80136544 (76.42416381835938MB)
   free     = 79520 (0.075836181640625MB)
   99.90086773641748% used


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