I think I'm on to something -- it seems that text layout information has
a cyclical reference that prevents the Text object from being freed.
Can you apply the attached patch and let me know if it solves your issue?
Mike
On 12/10/2010 02:19 PM, Russell E. Owen wrote:
You may have already seen this in the general mailing list, but I've
found what I think is a serious memory leak in matplotlib 1.0.0: it
leaks memory every time canvas.draw() is called, at least when using
TkAgg on unix and Mac.
Admittedly many graphs do not need canvas.draw() to be called repeatedly
(which I suspect is how it has survived this long). This came up in the
context of a strip chart widget, where I am changing the x/time axis
limits regularly and calling canvas.draw() so that the change is visible.
I submitted ticket 3124990 with a very simple demo script:
<https://sourceforge.net/tracker/?func=detail&atid=560720&aid=3124990&gro
up_id=80706>
(you can disable the setting the x limits if you want to see the leak in
its purest form, but then nothing changes visually on the graph).
I just wanted to be sure folks know about it in hopes somebody might
have an idea how to fix it. I have not tried any other back ends.
-- Russell
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new data types, scalar functions, improved concurrency, built-in packages,
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--
Michael Droettboom
Science Software Branch
Space Telescope Science Institute
Baltimore, Maryland, USA
Index: lib/matplotlib/cbook.py
===================================================================
--- lib/matplotlib/cbook.py (revision 8819)
+++ lib/matplotlib/cbook.py (working copy)
@@ -1109,9 +1109,10 @@
dict.__init__(self)
self.maxsize = maxsize
self._killkeys = []
+
def __setitem__(self, k, v):
if k not in self:
- if len(self)>=self.maxsize:
+ if len(self) >= self.maxsize:
del self[self._killkeys[0]]
del self._killkeys[0]
self._killkeys.append(k)
Index: lib/matplotlib/text.py
===================================================================
--- lib/matplotlib/text.py (revision 8819)
+++ lib/matplotlib/text.py (working copy)
@@ -143,6 +143,9 @@
Handle storing and drawing of text in window or data coordinates.
"""
zorder = 3
+
+ cached = maxdict(50)
+
def __str__(self):
return "Text(%g,%g,%s)"%(self._y,self._y,repr(self._text))
@@ -168,7 +171,6 @@
"""
Artist.__init__(self)
- self.cached = maxdict(5)
self._x, self._y = x, y
if color is None: color = rcParams['text.color']
------------------------------------------------------------------------------
Oracle to DB2 Conversion Guide: Learn learn about native support for PL/SQL,
new data types, scalar functions, improved concurrency, built-in packages,
OCI, SQL*Plus, data movement tools, best practices and more.
http://p.sf.net/sfu/oracle-sfdev2dev
_______________________________________________
Matplotlib-devel mailing list
Matplotlib-devel@lists.sourceforge.net
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