I can run the following:
Array streamContents: [ :out |
1 to: 20 do: [ :each |
Transcript crShow: each asString.
out nextPut: (ByteArray new: 16*1e6).
Transcript crShow: ('Now using {1} Mb' format: { (Smalltalk vm memoryEnd /
1e6) floor }) ] ].
but not higher.
> On 16 Nov 2014, at 23:48, Sven Van Caekenberghe <s...@stfx.eu> wrote:
>
> Hi Paul,
>
> Maybe this older discussion can help:
>
> http://forum.world.st/Pharo-dev-Exploring-Heap-Size-Limits-td4696226.html#a4696272
>
> especially Phil's explorations.
>
> Regards,
>
> Sven
>
>> On 16 Nov 2014, at 21:49, Paul DeBruicker <pdebr...@gmail.com> wrote:
>>
>> Hi -
>>
>> I don't have a need for a big image. I just discovered I have no idea how
>> to make one larger than ~512MB, and am curious.
>>
>> I was running into an out of memory error and discussing it in a thread on
>> pharo-users list
>> (http://forum.world.st/running-out-of-memory-while-processing-a-220MB-csv-file-with-NeoCSVReader-tips-tp4790264p4790441.html).
>> The details of that discussion aren't pertinent to this question.
>>
>> This script below ought to make an image that maxes out well above a GB but
>> cannot cross 512MB without throwing an OutOfMemory error.
>>
>>
>> | them |
>> them := OrderedCollection new.
>> [[them addLast: (ByteArray new: 16000000).
>> Transcript cr; show: ((Smalltalk vm parameterAt: 3) / (1024*1024.0)
>> printShowingDecimalPlaces: 1); flush] repeat]
>> on: OutOfMemory
>> do: [:ex| 2 to: them size by: 2 do: [:i| them at: i put: nil. Smalltalk
>> garbageCollect]].
>> Transcript cr; show: ((Smalltalk vm parameterAt: 3) / (1024*1024.0)
>> printShowingDecimalPlaces: 1); flush.
>> them := nil.
>> Smalltalk garbageCollect.
>> Transcript cr; show: ((Smalltalk vm parameterAt: 3) / (1024*1024.0)
>> printShowingDecimalPlaces: 1); flush
>>
>>
>> In the transcript you will see an output of the image size as more
>> ByteArrays are added to the OrderedCollection. On my laptop with 4GB of ram
>> it always peaks at just over 500MB.
>>
>> Setting the memory from the command line (e.g. pharo-ui --memory 1000m
>> Pharo.image) does not help.
>>
>> Is there a VM flag that I need to flip?
>>
>> Thanks
>>
>> Paul
>
