new and delete on HP-UX

From: Pascal Vincent (vincentp@in2p3.fr)
Date: Tue May 19 1998 - 13:41:02 MEST 

Hello!

  I have a problem of memory allocation on HP-UX. I have to create large 
arrays for event storage and I do not need to keep this amont of memory
in all the execution of my program. I tried to delete these arrays 
(TClonesArray) but I did not succeed. I mean that this memory is always 
loaded by my process. I made the following test in a root interactive 
session : 


$>root              need ->3884 Kb of memory  
root [0] TClonesArray *pouet = new TClonesArray("TTime",10000000)
                    memory grows to  ->82072 Kb 
root [1] delete pouet
                    stay at 82072 Kb...

I made this test on 2 different root version (1.03/06 27 October 1997 and 
1.03/09 16 December 1997) on HP-UX 10.2. I tried a "pouet->Delete()"
before, but with the same result. In an other hand, it seems to work on 
PC-Linux (I use root version : 1.03/08  (24 November 1997)).

$>root              need ->  7424 Kb of memory
root [0] TClonesArray *pouet = new TClonesArray("TTime",10000000)
                    memory grows to  -> 85768 Kb
root [1] delete pouet
                    go down to 7668 Kb... Not perfect but enought for me.
 

 Any idea? 

cheers,
Pascal.

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