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Re: IDL - freeing up used memory? [message #84374]

Wed, 29 May 2013 10:43

Andy Sayer
Messages: 127
Registered: February 2009

Senior Member

Hi David,

Thanks for the tip--I'll try using undefine and see whether that helps. Unfortunately, the data volume in the files is quite variable so the arrays will be quite different sizes.

As an update, the same code runs without issue on IDL 7.1.1 on Mac OS 10.8. So perhaps it's in part related to CentOS?

Thanks,

Andy

On Wednesday, May 29, 2013 1:20:46 PM UTC-4, David Fanning wrote:
> AMS writes:
>
>
>
>
>
>> I'm running into a memory issue which I am not certain whether is related to my IDL code or the machine the code is running on itself, and am wondering whether someone might be able to help me out. To start with, I'm using IDL 7.1.1 on CentOS, invoking via command line.
>
>>
>
> I think your memory is getting fragmented. I would think about doing two
>
> things. First, I wouldn't set your unused variables to 0, as I think
>
> that promotes fragmentation. I would use the Coyote Library routine
>
> UNDEFINE to get rid of them:
>
>
>
> http://www.idlcoyote.com/programs/undefine.pro
>
>
>
> But, maybe better than this, I would try (assuming they are always the
>
> same size) to reuse the memory you have already set aside for reading in
>
> the variables:
>
>
>
> FOR j=0,n DO ....
>
> IF N_Elements(inputVar) EQ 0 THEN $
>
> inputVar = ... ELSE $
>
> inputVar = Temporary(inputVar) * 0
>
> ReadU, lun, inputvar
>
>
>
> Cheers,
>
>
>
> David
>
> --
>
> David Fanning, Ph.D.
>
> Fanning Software Consulting, Inc.
>
> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
>
> Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		Re: IDL - freeing up used memory? By: Andy Sayer on Wed, 29 May 2013 10:43
		Re: IDL - freeing up used memory? By: David Fanning on Wed, 29 May 2013 10:20
		Re: IDL - freeing up used memory? By: ptomar2006 on Mon, 22 December 2014 05:05
		Re: IDL - freeing up used memory? By: Helder Marchetto on Mon, 22 December 2014 05:53
		Re: IDL - freeing up used memory? By: Andy Sayer on Fri, 31 May 2013 06:32

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