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Groups > comp.lang.java.gui > #589

memory allocation for a m

From "Brandon McCombs" <brandon.mccombs@THRWHITE.remove-dii-this>
Subject memory allocation for a m
Message-ID <45a1dc0d$0$11216$4c368faf@roadrunner.com> (permalink)
Newsgroups comp.lang.java.gui
Date 2011-04-27 15:28 +0000
Organization TDS.net

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  To: comp.lang.java.gui
hello,

My application makes multiple JNDI search calls to a directory server. 
The search method returns a NamingEnumeration of SearchResults and I run 
through a while loop that converts the enumeration to a Vector of 
SearchResults. At another time I process the Vector to add the 
SearchResults to a ListModel for viewing their properties.

My application takes up a lot of memory after running that search 
operation a handful of times. It seems that the majority of the memory 
allocation comes from the hasMoreElements() method of the enumeration 
that I call within the while() mentioned above.  I don't see any way of 
not calling that method since I need it to grab the search results. The 
question I have is why would the JVM use so much space for that method 
and is there anything I can do to reclaim the memory?  JProfiler says 
that after a handful of search() executions there are over a million 
allocations of hasMoreElements() that take up 50 megs. Jprofiler shows 
garbage collections are occurring but since a method and not an Object 
is taking up the memory I don't know how to fix this problem.

As a side note, if it was possible to properly cancel JNDI search 
methods (from the InitialLdapContext class) then I wouldn't have such a 
problem but once those searches start they can't be canceled from what I 
can gather, despite utilizing threads.

thanks
Brandon

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memory allocation for a m "Brandon McCombs" <brandon.mccombs@THRWHITE.remove-dii-this> - 2011-04-27 15:28 +0000
  Re: memory allocation for "Daniel Pitts" <daniel.pitts@THRWHITE.remove-dii-this> - 2011-04-27 15:28 +0000
    Re: memory allocation for "Brandon McCombs" <brandon.mccombs@THRWHITE.remove-dii-this> - 2011-04-27 15:28 +0000
      Re: memory allocation for "Brandon McCombs" <brandon.mccombs@THRWHITE.remove-dii-this> - 2011-04-27 15:28 +0000
  Re: memory allocation for "Nigel Wade" <nigel.wade@THRWHITE.remove-dii-this> - 2011-04-27 15:28 +0000
    Re: memory allocation for "Brandon McCombs" <brandon.mccombs@THRWHITE.remove-dii-this> - 2011-04-27 15:28 +0000

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