RE: "out of memory or dimension too large for Octave's index type"

[Yan Zhang]

Hi Francesco and Philip,

Thank you very much for the help.

Restarting octave is not an option as the "out of memory" issue happens in the 
middle of a program. Although I didn't use any java interface functions in the 
program, I tried the "javamem" function and found no issues. I also checked the 
windows services and processes but found no abnormal usage of memory.

It also occurred to me that the issue might be caused by fragmentation before I 
posted my question, but I couldn't find a solution to it other than switching 
to 64 bit octave. I'm wondering if there is  a way to defragment memory used by 
octave (but not by restarting), or any other suggestions.

Thanks.

Best Regards,

Yan


-----Original Message-----
From: Francesco Potortì [mailto:address@hidden 
Sent: Monday, January 15, 2018 11:21 AM
To: Yan Zhang
Cc: address@hidden
Subject: Re: "out of memory or dimension too large for Octave's index type"

>I got this "out of memory or dimension too large for Octave's index 
>type" issue when I was trying to create a matrix of size 5184 by 3904
...
>The only thing is that the octave program has been running for a while. 
>But I've cleared all the variables by running 'clear all'
>command and results of 'whos' command show no variable exists in local 
>workspace.
>
>The version of octave is 4.2.1 32 bit, OS is Windows 7 64bit. I 
>understand that switching to octave 64bit might solve this issue, but 
>it is not a viable solution for my current situation.

The size of the matrix is 160MB, nothing to do with 64 bit indexing.

As far as I can remember, this may have to do with memory fragmentation under 
Windows.  I am sure Windows users can be more specific, and that if you look 
for that keyword you should find earlier explanations, but I suspect that 
rebooting the system will help at least for a while.

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