http://imagej.273.s1.nabble.com/increasing-memory-allocation-via-Java-code-tp3689982p3689988.html
> Hi Cedric,
>
> I have a 4-core system with 8 Gb of RAM, I have allocated like you 5Gb
> for java, I can create a 4.5 Gb image. Of course I'm on linux, with
> sun java 1.6.
>
> a bientot
>
> Thomas
>
>
> Cédric Messaoudi a écrit :
>> I have to point out that the jvm from sun (on windows, I didn't check on
>> linux) has a small limitation of memory on multi core/cpu systems.
>>
>> On my dual core cpu in my laptop with 8 GB of RAM, I am able to start
>> ImageJ
>> with the option -Xmx5000m but when trying to allocate a volume of 4 GB I
>> have an out of memory error. It seems that the jvm from sun is dividing
>> actual RAM memory by the number of cores. Would it be possible to other
>> people to test this issue?
>> Trying BEA jvm (jrockit) allowed me some time ago to solve this problem.
>> Actually I mostly use virtual stack to open very big dataset, so it
>> not a
>> problem from my part to use the jvm from sun.
>>
>> Regards,
>> Cédric
>>
>>
>>
>> ----------------------------------------------------------
>> Cédric MESSAOUDI
>> Institut Curie - INSERM U759 Laboratoire d'Imagerie Intégrative
>> Bât 112, Centre Universitaire d'Orsay 91405 Orsay CEDEX
>> France
>> ----------------------------------------------------------
>>
[hidden email]
>> ----------------------------------------------------------
>>
>>
>>
>> -----Message d'origine-----
>> De : ImageJ Interest Group [mailto:
[hidden email]] De la part de
>> Pang,
>> Zhengyu (GE, Research)
>> Envoyé : vendredi 11 décembre 2009 15:44
>> À :
[hidden email]
>> Objet : Re: what is real max memory limit of ImageJ ?
>>
>> Franklin,
>>
>> Size of image is different from size of image stored in the memory. JPEG
>> image size is much smaller than TIFF, but when it is loaded to memory,
>> it is same as TIFF file.
>>
>> In your application, I wonder if you close images once you are done with
>> those image. Just use close(), then your computer could free up the
>> space.
>>
>> Hopefully it helps.
>>
>> Zhengyu
>>
>> Dr. Zhengyu Pang
>> Biochemistry and Biological Engineering Laboratory
>> General Electric Company Global Research
>>
>> GE Imagination at work
>>
>> -----Original Message-----
>> From: ImageJ Interest Group [mailto:
[hidden email]] On Behalf Of
>> Franklin Shaffer
>> Sent: Friday, December 11, 2009 9:12 AM
>> To:
[hidden email]
>> Subject: what is real max memory limit of ImageJ ?
>>
>> I am doing particle recognition and tracking of images on high speed
>> videos. I break the hs video up into images, then load the image
>> sequence into ImageJ.
>>
>> I put 64 GB of RAM in a very fast PC (HP Z800). I try to load a
>> sequence of 50,000 image files, but I get a memory error after it loads
>> about 40,000. The total combined size of all of the 50,000 images is 20
>> GB. But I have 64 GB of RAM, and I have the memory limit set in ImageJ
>> as 50 GB.
>>
>> So if I tell ImageJ to use 50 GB of RAM, why is it giving memory errors
>> when I try to load 20 GB of images ?
>>
>> ImageJ is an excellent code for cell/particle analysis, so I want to
>> continue using it.
>>
>> Thank you all for building ImageJ!
>> Frank Shaffer
>> Research Engineer, National Energy Technology Laboratory, US.
>>
[hidden email]
>>>>> "Roy Wollman" <
[hidden email]> 10/30/2009 9:47 PM >>>
>> Hi All,
>>
>> I'm trying to import few of the ImageJ classes to use within matlab.
>> Matlab has great java support which basically means that I can create
>> objects on the command line (e.g. stk=imp.createEmptyStack();).
>>
>> However, the maximal memory allocation is too low. Since I'm running on
>> a OS-X with 64-bit and lots of memory I want to increase the maximal
>> memory allocation. I already don't so in the standalone
>> ImageJ64 application and it works great.
>>
>> Here is the matlab code I'm using:
>>
>> javaaddpath
>> /Applications/ImageJ/ImageJ64.app/Contents/Resources/Java/ij.jar
>> import ij.*;
>> mem=ij.plugin.Memory;
>> mem.run('');
>>
>> Than I get the menu in which I change the total memory but.... I get the
>> following message:
>>
>> ImageJ is unable to change the memory limit. For more information, refer
>> to the installation notes at
>>
>>
http://rsb.info.nih.gov/ij/docs/install/>> The ImageJ application (ImageJ.app) was not found.
>>
>> Current limit: 189MB
>>
>> Since the java objects are created within matlab its not my job to worry
>> about memory management but matlab's problem. Is there another way to
>> increase the limit or just disable the memory limit altogether?
>>
>> Thanks,
>> Roy
>>
>>
>
Mag. Johannes-P. KOCH
Dr. Bohrgasse 9/5