[daip] ssh

[Amy Mioduszewski]

To increase the memory used by AIPS use setmaxap.  Set it to less than the total 
amount of memory on you machine because your operating system etc will use some 
memory and if AIPS asks for more memory than is available things will run slower 
because of memory swaps.  Do an "explain setmaxap" the a more thorough 
explanation.  Type setmaxap(0) to see what the memory is set to.

Amy

Marina Kounkel wrote:
> On Wed, Dec 19, 2012 at 12:30 PM, Amy Mioduszewski <amiodusz at nrao.edu 
> <mailto:amiodusz at nrao.edu>> wrote:
> 
>         By server I mean the linux box that arrived last week on which
>         aips was installed. It wasn't any particular task, rather, it is
>         overall performance. When we were waiting for the commands to be
>         executed we looked at how the memory was being used, and it
>         almost seemed like aips was completely unaware of the system
>         resources it had, out of 19 (?) cores present on the machine it
>         utilized only one of them, so the CPU rarely went above 2-3%.
> 
>     Ahhhh, aips is not parallelized, so multiple cores will not help
>     (unless  you are running other stuff).  If you have a lot of memory
>     there are ways to have aips use that, but not multiple cores.
> 
> 
> So, theoretically speaking, how would one go about feeding aips more 
> memory? I am not completely sure it is just the core. Attached it the 
> screen-shot from the system monitor during what appears to be very 
> memory intensive command.
> 
> Marina
> 
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