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Memory deallocate problem [message #11298]

Fri, 27 March 1998 00:00

Ying Jin
Messages: 1
Registered: March 1998

Junior Member

Does anyone know the mechanism of memory deallocation of IDL ?
My problem is :
When I open several big arrays, I literally exhaust all the available
memory, but I need more. And I don't care to deallocate the memory
for the previous arrays.
I have digged through the help and manual of the IDL version 4.0.3.
It turns out that IDL seems to not want user to tackle the issue by
themselves.

Thanks in advance.
Ying Jin
--
Ying Jin's address:
Ying Jin
Earth System Science Laboratory
University of Alabama in Huntsville
977 Explorer Blvd.
Huntsville, AL 35806
Tel:
(205) 922-5938 (O)
E-mail: yjin@atmos.uah.edu

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Re: Memory deallocate problem [message #11522 is a reply to message #11298]

Mon, 30 March 1998 00:00

korpela
Messages: 59
Registered: September 1993

Member

In article <351BDB75.7979@eosdis.atmos.uah.edu>,
Ying Jin <yjin@eosdis.atmos.uah.edu> wrote:
> Does anyone know the mechanism of memory deallocation of IDL ?
> My problem is :
> When I open several big arrays, I literally exhaust all the available
> memory, but I need more. And I don't care to deallocate the memory
> for the previous arrays.
> I have digged through the help and manual of the IDL version 4.0.3.
> It turns out that IDL seems to not want user to tackle the issue by
> themselves.

One possible solution is to use memory mapped files to create additional
virtual memory assuming you work under an OS that supports memory
mapped files. I wrote some code to solve a similar problem. A discussion
and the code is located at:

http://sag-www.ssl.berkeley.edu/~korpela/mmap/

There's also a discussion of memory deallocation in the IDL FAQ.

Eric

--
Eric Korpela | An object at rest can never be
korpela@ssl.berkeley.edu | stopped.
<a href="http://sag-www.ssl.berkeley.edu/~korpela">Click for home page.</a>

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