[ncl-talk] a NCL memory usage question

[Wei Huang]

NCLers,

I am recently running NCL daily which all calls function:

plot := gsn_csm_contour_map(wks, plot_var, res)

with differnt plot_var, and res has different attributes of color and levels:
e.g.  res at cnFillColors and res at cnLevels varies with plot_var.
The "wks" defines plot-type "png", with pixel number in both x,y changes from 256 to 1024.

One thing I noticed is that the memory usage varies a lot, as below
(from "top" output, where the 5th columns are memory for different jobs):

10067 whuang    20   0 16.592g 236044   7540 R 100.0  0.1   0:39.64 ncl
14364 whuang    20   0 16.382g 264436   7512 R 100.0  0.1   3:39.19 ncl
41716 whuang    20   0 1378632 143180   7540 R 100.0  0.1   1:15.60 ncl
54309 whuang    20   0 1373192 137288   7540 R 100.0  0.1   1:06.56 ncl
59468 whuang    20   0 1377664 136928   7540 R 100.0  0.1   1:47.91 ncl

Does anyone has such experience, and knows why memory usage varies so much?

Thanks,

Wei

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