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From DOrlov <dor...@redaril.com>
Subject Re: TomCat 6 performance issues
Date Tue, 22 Dec 2009 11:34:10 GMT



Pid Ster wrote:
> 
> Any chance you can upgrade to the most recent Tomcat?
> 
> How much total physical RAM do you have?
> 
> Examine the heap "jmap -heap <pid>", and post the results.
> 
> 
> 

I have 8Gb RAM on the machine.

Jmap heap:
JVM version is 14.3-b01

using thread-local object allocation.
Parallel GC with 2 thread(s)

Heap Configuration:
   MinHeapFreeRatio = 40
   MaxHeapFreeRatio = 70
   MaxHeapSize      = 6442450944 (6144.0MB)
   NewSize          = 2686976 (2.5625MB)
   MaxNewSize       = 17592186044415 MB
   OldSize          = 5439488 (5.1875MB)
   NewRatio         = 2
   SurvivorRatio    = 8
   PermSize         = 21757952 (20.75MB)
   MaxPermSize      = 536870912 (512.0MB)

Heap Usage:
PS Young Generation
Eden Space:
   capacity = 572194816 (545.6875MB)
   used     = 433650792 (413.5616226196289MB)
   free     = 138544024 (132.1258773803711MB)
   75.78726333654865% used
>From Space:
   capacity = 143327232 (136.6875MB)
   used     = 109273432 (104.21126556396484MB)
   free     = 34053800 (32.476234436035156MB)
   76.24052350358653% used
To Space:
   capacity = 150798336 (143.8125MB)
   used     = 0 (0.0MB)
   free     = 150798336 (143.8125MB)
   0.0% used
PS Old Generation
   capacity = 3721330688 (3548.9375MB)
   used     = 1763047984 (1681.3735809326172MB)
   free     = 1958282704 (1867.5639190673828MB)
   47.376815763383185% used
PS Perm Generation
   capacity = 121372672 (115.75MB)
   used     = 73830192 (70.40995788574219MB)
   free     = 47542480 (45.34004211425781MB)
   60.829337266299945% used


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