Re: [Matplotlib-users] Matplotlib eating memory

[Michael D. <md...@st...>]

Can you provide a complete, standalone example that reproduces the 
problem. Otherwise all I can do is guess.

The usual culprit is forgetting to close figures after you're done with 
them.

Mike

On 10/10/2013 09:05 AM, Martin MOKREJŠ wrote:
> Hi,
>    rendering some of my charts takes almost 50GB of RAM. I believe below is a stracktrace
> of one such situation when it already took 15GB. Would somebody comments on what is
> matplotlib doing at the very moment? Why the recursion?
>
>    The charts had to have 262422 data points in a 2D scatter plot, each point has assigned
> its own color. They are in batches so that there are 153 distinct colors but nevertheless,
> I assigned to each data point a color value. There are 153 legend items also (one color
> won't be used).
>
> ^CTraceback (most recent call last):
> ...
>      _figure.savefig(filename, dpi=100)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 1421, in savefig
>      self.canvas.print_figure(*args, **kwargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/backend_bases.py", line 2220, in print_figure
>      **kwargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 505, in print_png
>      FigureCanvasAgg.draw(self)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/backends/backend_agg.py", line 451, in draw
>      self.figure.draw(self.renderer)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in draw_wrapper
>      draw(artist, renderer, *args, **kwargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/figure.py", line 1034, in draw
>      func(*args)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in draw_wrapper
>      draw(artist, renderer, *args, **kwargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/axes.py", line 2086, in draw
>      a.draw(renderer)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in draw_wrapper
>      draw(artist, renderer, *args, **kwargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line 718, in draw
>      return Collection.draw(self, renderer)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/artist.py", line 54, in draw_wrapper
>      draw(artist, renderer, *args, **kwargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line 276, in draw
>      offsets, transOffset, self.get_facecolor(), self.get_edgecolor(),
>    File "/usr/lib64/python2.7/site-packages/matplotlib/collections.py", line 551, in get_edgecolor
>      return self._edgecolors
> KeyboardInterrupt
> ^CError in atexit._run_exitfuncs:
> Traceback (most recent call last):
>    File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
>      func(*targs, **kargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/_pylab_helpers.py", line 90, in destroy_all
>      gc.collect()
> KeyboardInterrupt
> Error in sys.exitfunc:
> Traceback (most recent call last):
>    File "/usr/lib64/python2.7/atexit.py", line 24, in _run_exitfuncs
>      func(*targs, **kargs)
>    File "/usr/lib64/python2.7/site-packages/matplotlib/_pylab_helpers.py", line 90, in destroy_all
>      gc.collect()
> KeyboardInterrupt
>
> ^C
>
>
> Clues what is the code doing? I use mpl-1.3.0.
> Thank you,
> Martin
>
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