Standard Manager and concurrent hashmap

[daniel steel <se...@yahoo.com>]

hello all,
  we are investigating memory issues on tomcat 6 and found that nearly 20 to 25% of the heap memory is being used by StandardManager - concurrent hashmap - [attached file].

how does tomcat use standard manager / concurrent hahsmap? 
can this foot print be reduced in any way by turning off any setting - and the side effects? 

thank you very much,
dan



      

Re: Standard Manager and concurrent hashmap

[Gregor Schneider <rc...@googlemail.com>]

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RE: Standard Manager and concurrent hashmap

["Caldarale, Charles R" <Ch...@unisys.com>]

> From: daniel steel [mailto:secc77@yahoo.com] 
> Subject: Standard Manager and concurrent hashmap
> 
> how does tomcat use standard manager / concurrent hahsmap? 

There are no references to ConcurrentHashMap in StandardManager.  (Yes, you are being graded on proper case and spelling.)

The StandardSession class does use a ConcurrentHashMap to store attributes that *your* applications keep in sessions.  If you want to use less of the heap, don't set as many attributes.

 - Chuck


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