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Forum: Run Management
Re: Question Geant4 eating up memory! (Zach Hartwig)
Date: 07 Jul, 2005
From: Vladimir IVANTCHENKO <>

On Wed, 6 Jul 2005, Zach Hartwig wrote:

> *** Discussion title: Run Management
> Email replies to must include:
>   In-Reply-To: <"/runmanage/104">
>   Subject: ...change this to be about your reply.
> Hi everyone,
> I'm currently having a nasty problem with Geant4 and memory.
> During run-time, Geant4 rapidly consumes memory.  If a sufficient 
> number of events are generated (~100), Geant4 eventually eats up 
> all the available memory and freezes the computer.  
> A simple description:  I have a circular "storage" tube composed 
> of 12 identical "G4Tubs" sections of 30 degrees each composed
> of vacuum.  There are 1cm thick aluminum walls that surround each 
> of the 12 vacuum sections, each of the 4 walls (top,bottom,2 sides) 
> are also "G4Tubs" of 30 degrees each.  A magnetic field, that I have 
> derived from G4MagneticField, is placed within the regions surrounded 
> by the aluminum walls. 
> Things I have tried to eliminate memory issues:
> -eliminated all optional user classes(ie, eventAction, steppingAction...)
> -ran the geant4 geometry tests and got no overlapping, no spurious errors
> -stripped down my complicated geometry to the one described above
> -turned off trajectory storage
> -ran Geant4 with memory checker "valgrind"
> -ensured all created objects are deleted
> Any suggestions on where to find these mysterious and devastating memory
> leaks would be greatly appreciated!  Thanks very much.
> ~Zach

Please, run any of G4 official example. If you will have the same leak, it
will be an indication of problem of installation, if no - problem in your


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