Re: a big limit of mathematica?

On Wed, 21 Sep 2005 15:35:52 GMT, Richard Fateman wrote:
> Dave Seaman wrote:

>> On Tue, 20 Sep 2005 09:31:47 -0700, Richard J. Fateman wrote:

>>>(RJF) Mathematica's limitations are very likely related
>>>to the amount of virtual memory it is allocated by
>>>the operating system, and perhaps by the maximum
>>>amount of memory Mathematica declares it is going to
>>>use. Such limits are much smaller than the 64 bit
>>>limit on address space. In particular,
>>>doing


>> (DS) That's not the way virtual memory works, at least on any decent operating
>> system.

> I thought we were talking about Windows?

I certainly wasn't talking about Windows, and the OP gave the indication
that he was talking about more than one OS.

> The amount of virtual memory that is allocated to an application
>> by the operating system is determined dynamically and is limited only by
>> the total amount of swap space available on the computer.

> There is a nice discussion here
> http://www.rsinc.com/services/techtip.asp?ttid=3346
> which suggests that there are a number of other factors in Windows.

I don't do Windows.

>> (DS) That means the G5 successfully
>> computed an array that exceeds the size of its physical memory.

> That's certainly the way it is supposed to work. The G5 is not
> running Windows.

I wouldn't be using a G5 if it did.


--
Dave Seaman
Judge Yohn's mistakes revealed in Mumia Abu-Jamal ruling.
<http://www.commoncouragepress.com/index.cfm?action=book&bookid=228>
.

Relevant Pages

  • Virtual Memory greater than 4096MB!
    ... windows XP x64 operating system running on AMD Athlon 64. ... as 4088MB despite the virtual memory still set to 10000MB! ...
    (comp.soft-sys.matlab)
  • Re: Virtual Memory greater than 4096MB!
    ... windows XP x64 operating system running on AMD Athlon 64. ... as 4088MB despite the virtual memory still set to 10000MB! ...
    (comp.soft-sys.matlab)
  • Re: Added memory but only 30% of available memory ever used
    ... "At the same time an amount of virtual memory is in use equivalent to ... Use page file monitor to observe what is the peak usage. ... too small at 1 GB and that Windows would resize it automatically. ...
    (microsoft.public.windowsxp.general)
  • Re: out of Virtual memory
    ... Set virtual memory to 'Windows managed' and then leave it alone.. ... > Operating system Windows XP. ... > another hard drive) so as the paging file is not with the ...
    (microsoft.public.windowsxp.messenger)
  • Re: Operating system showing discrepancy in used space
    ... > My Windows XP operating system shows the amount of used ... > space to be different when i check my C: drive properties ...
    (microsoft.public.windowsxp.hardware)