[Swift-devel] Re: Memory in Swift

Justin M Wozniak wozniak at mcs.anl.gov
Mon Oct 18 16:36:23 CDT 2010


What do you get if you set it to 8192M?

On Mon, 18 Oct 2010, Jonathan Monette wrote:

> I am on PADS.
>
> On 10/18/2010 01:21 PM, Justin M Wozniak wrote:
>> On Mon, 18 Oct 2010, Jonathan Monette wrote:
>>
>>>    1) What is the maximum value for SWIFT_HEAP_MAX?  Is it the maximum 
>>> memory available on the machine?  If I ask for 8Gb will the Java heap 
>>> space be 8Gb?
>> 
>> In bin/swift, that value is passed directly to the Java VM, so it's 
>> implementation-specific.  What kind of machine are you on?
>>
>>>    2) Assuming that the above question does not fix my problem, what can 
>>> be done to fix memory problems in Swift?  How should a Swift script be 
>>> programmed to avoid these issues or is how Swift handles memory not 
>>> optimal. I have a set of about 4100 images that will be stitched together 
>>> to form a mosaic.  The size of this set is 8.1Gb.  Right now in my sites 
>>> file I set SWIFT_HEAP_MAX to 4096M(4Gb) but I am still getting out of 
>>> memory errors with the Java heap space.  Is Swift just not able to scale 
>>> up to this size of data yet?
>> 
>
>

-- 
Justin M Wozniak



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