[ADMB Users] gradstack buffer size error

[Allan Hicks]

Hi Mollie,

Another thought, can you let me know what OS you are using and how much 
memory you have installed?   If your gradfil1.tmp file is 32Gb, you will 
need to have a lot of memory available to the OS, which means you need a 
lot installed and a 64-bit OS.

The temporary files are written to in memory intensive models when 
memory isn't available, so it is actually a feature of ADMB. Otherwise, 
you simply would not be able to run the model at all.

Thanks,
Allan

On 2/1/2011 4:56 PM, Mollie Brooks wrote:
> Hi,
> I'm continually having problems with memory allocation. I don't 
> understand the purpose of this error
>
>  It appears that the size you are setting for the
>  GRADSTACK_BUFFER is > 64K in a 16 bit word machine.This appears
>  to be an error. The maximum size argument for the function
> --- gradient_structure::set_GRADSTACK_BUFFER_SIZE(long int i) ---
> should probably be  89478485
> UINT_MAX = 4294967295
>  i = 10000000000
>  gs_size = 48
>  i*gs_size = 480000000000
>
> I really do need a buffer larger than this (otherwise I get a 
> gradfil1.tmp >32GB). When I ask for a larger buffer in the command 
> line (-gbs), it behaves erratically: sometimes it is enough and 
> sometimes I get the gradfil1.tmp. It's very frustrating. The only 
> difference between the different runs is the node on the cluster that 
> the job goes to. Could that be causing the program to use different 
> amounts of memory.
> thanks,
> Mollie
>
>
>
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