[Qgis-developer] Possible memory leak in QGIS redraws?

Nyall Dawson nyall.dawson at gmail.com
Thu Oct 8 11:48:47 PDT 2015

On 9 Oct 2015 01:53, "Régis Haubourg" <regis.haubourg at eau-adour-garonne.fr>
> Hi all,
> I try to narrow down a production issue here.
> In long sessions with lot's of redraws on complex projects, memory seems
> increase regularly.
> In a more simple environnement with no plugins, just sending multiple
> redraws using F5 key triggers it.
> It grows quite fast on 2.6 up to 4Go sometimes, quite slower in master and
> 2.10. Every 5-6 redraws, QGIS adds 1Mo of RAM in 2.6, less often in recent
> versions.
> If confirmed, and if nothing else is to be blamed (windows?, QT?) this is
> serious issue for enterprise uses, especially if we want to build
> application that run all day long with many canvas redraws.
> Could anyone try to reproduce this ?

I've been seeing this with large atlas exports too. I can reproduce in 2.8,
in 2.10 it was much worse, but in master it's back to 2.8 levels.

Tried everything I can to track this down with no luck. My suspicion at the
moment is a leak in either qt or geos. I'd be interested to see if geos 3.5
has any effect...


> Redrawing while previous redraw is not over could be at fault?
> Thanks for your help.
> Cheers
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