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Re: IDL Memory Leaks [message #27672 is a reply to message #27671]

Mon, 05 November 2001 13:21

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Myron Brown (brownmz1@jhuapl.edu) writes:

> 4. The code includes repetitive reassignments of variables to large arrays,
> even within a routine (still in scope). I tried to assign variables to zero
> each time, but it doesn't seem to make a difference. Should this really be
> necessary?

I'd like to see how you are doing this (I hope you
are using the TEMPORARY function!), as this is more
than likely the source of your problem. You don't say
how you know you are "leaking memory", but this is the
kind of thing that will eat up process memory if you
are not careful.

If you have the same variable on both sides of an equal
sign, you really need something like this:

image = Temporary(image) * 5

And when you are done with it:

Undefine, image

(The UNDEFINE program can be found on my web page.)

Otherwise, you continually get more and more process
memory (with malloc), and there is no way to give it
back.

"Is it necessary?". Yes, it is very, very necessary. :-)

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: IDL Memory Leaks By: Myron Brown on Mon, 05 November 2001 13:58
		Re: IDL Memory Leaks By: David Fanning on Mon, 05 November 2001 13:21
		Re: IDL Memory Leaks By: Myron Brown on Mon, 05 November 2001 12:57
		Re: IDL Memory Leaks By: John-David T. Smith on Mon, 05 November 2001 10:24
		Re: IDL Memory Leaks By: David Fanning on Mon, 05 November 2001 10:22
		Re: IDL Memory Leaks By: John-David T. Smith on Tue, 06 November 2001 09:59
		Re: IDL Memory Leaks By: pit on Tue, 06 November 2001 07:15
		Re: IDL Memory Leaks By: Mark Hadfield on Mon, 05 November 2001 17:02
		Re: IDL Memory Leaks By: John-David T. Smith on Mon, 05 November 2001 14:22
		Re: IDL Memory Leaks By: Stein Vidar Hagfors H[1] on Tue, 06 November 2001 06:23
		Re: IDL Memory Leaks By: Jaco van Gorkom on Tue, 06 November 2001 05:16

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