[Developers] AD model and RAM

[Arni Magnusson]

Hi Mark,

I think if Peter runs his model on the the machine he describes, it would 
utilize only 1 core but the full 8 GB of RAM, minus what's reserved for 
the OS. So that might well fix his problem. Although cache memory is 
largely core-specific, the RAM is shared.

It would be very useful if ADMB could report the amount of memory required 
by the model. Peter's model (buggy or not) may require >1000 GB for all we 
know. Do you guys know if ADMB can report the required memory, so users 
can determine the RAM they need?

Arni



On Fri, 28 May 2010, Mark Maunder wrote:

> Johnoel or Arni,
>
> Do you have any advice for this person? I can guess what the answer is, 
> but I don't want to misguide him.
>
> Mark
>
>
>
> From: Peter Stephenson [mailto:Peter.Stephenson at fish.wa.gov.au]
> Sent: Thursday, May 27, 2010 11:00 PM
> To: Mark Maunder
> Subject: AD model and RAM
>
> Hi Mark, I have not spoken to you for years. Hope all is going well for 
> you.
>
> I have a complex lobster model, made even more so recently by Andre. I 
> have a dual core notebook with Windows Vista and 3.1 GIG of RAM which is 
> not enough memory. AD model keeps writing tempory files to disc and 
> slowing things down. I can go as far as -cbs 150000000000 -gbs 
> 150000000000 and switch the program to real time priority in task 
> Manager, but it will not process in memory.
>
> If I get an quad core with 8 gig of ram and a 64 bit processor and run 
> Windows 7, will the computation thread between the cores or will I still 
> just have 2 GIG of ram.
>
> Cheers
>
> Peter
>