[ferret_users] Re: Tips and Tricks to avoid memory problems in Ferret

[Dongxiao Zhang <Dongxiao.Zhang@xxxxxxxx>]

Hi Jaison (and all),

Thanks for your excellent summary of the solutions.

However, I did split the calculation along time axis for each time step 
(one month apart).

> 4. Remember that Ferret is not an "immediate evaluator" by default, and
>         it does so only when you force with grave accents (``). Hence you
>         can write all the calculation steps before the writing out part.

I always thought this was true, so that calculation on each time step 
would only require the memory for xyz grid points. But in practice at 
least in my case, I notice that the memory used by ferret, shown by "top" 
command, actually accumulates with the number of time steps, until it 
reaches the maximum memory of my linux workstation and leads ferret to 
crash. This was the reason that I can only do the calculation 
for a limited number of time steps. I tried "cancel memory", "cancel 
variable", and even "cancel data" and reread in data: Nothing works. In 
the end I had to quit ferret after certain time steps, and restart and 
continue on. Has anybody noticed this?

BTW, I read in data through DODs server.

Best,

Dongxiao