[Qgis-developer] Memory leak in QGIS 2.14 with a Shapefile

[kimaidou]

Hi

I just tested with a freshly built QGIS release-2_14 , and the issue
remains.
The easiest way to reproduce is to zoom back and forth from big scales ( ~
1:25 000 ) to layer extent scale ( ~ 1:600 000 )

Good evening/morning
Michaël

2016-05-09 15:02 GMT+02:00 kimaidou <kimaidou at gmail.com>:

> Hi Matthias,
>
> Not yet, I need to build QGIS master before being able to report back
> Thanks for your answer
>
> 2016-05-09 14:59 GMT+02:00 Matthias Kuhn <matthias at opengis.ch>:
>
>> Have you tested with either the latest 2.14 nightly or master nightly?
>> An issue with OGR connection pooling has been resolved recently. And I
>> wonder if that could be related.
>>
>>  -- Matthias
>>
>>
>> On 05/09/2016 02:28 PM, kimaidou wrote:
>>
>> I created an issue about it : <http://hub.qgis.org/issues/14792>
>> http://hub.qgis.org/issues/14792
>>
>> 2016-05-09 11:48 GMT+02:00 kimaidou <kimaidou at gmail.com>:
>>
>>> Hi again,
>>>
>>> I also forgot to mention that I have no memory leak when using the same
>>> dataset in PostGIS ( tested by importing the Shapefile in PostGIS with
>>> shape2pgsql )
>>>
>>> Michaël
>>>
>>> 2016-05-09 11:07 GMT+02:00 kimaidou < <kimaidou at gmail.com>
>>> kimaidou at gmail.com>:
>>>
>>>> I forgot to mention the steps to reproduce the bug, and the precautions
>>>> to take :
>>>>
>>>> * open the project in QGIS 2.14 ( I have not tested with older versions)
>>>>
>>>> * open a terminal and use this kind of command to monitor QGIS memory
>>>> consumption : htop, or ps with
>>>> watch -n1 'ps -aux --sort -pmem | head -5'
>>>>
>>>> * Navigate through the project by zooming in and out, pan, etc. I think
>>>> you emphasize the memory leak by displaying the layer at small scale ( with
>>>> many buildings displayed)
>>>>
>>>> * Be aware that this will increase the memory, so keep an eye on the
>>>> memory consumption so that your system has enough free memory to work
>>>> properly.
>>>>
>>>> Michaël
>>>>
>>>> 2016-05-09 11:00 GMT+02:00 kimaidou < <kimaidou at gmail.com>
>>>> kimaidou at gmail.com>:
>>>>
>>>>> Hi devs,
>>>>>
>>>>> I have just found a memory leak in QGIS Desktop (and server) with the
>>>>> project available in [1] ( a 20Mo tar.bz2 )
>>>>>
>>>>> This is a very simple project with only one buildings Shapefile ( SHP
>>>>> 68Mo). This layer has been exported from PostGIS from a query wich aimed to
>>>>> simplify the building for fast rendering.
>>>>>
>>>>> The geometries have been simplified ( I used SnapToGrid, then
>>>>> (St_Dump(St_Union(a.geom)))  to remove as many nodes as possible )
>>>>>
>>>>> The layers has ~ 700 000 features.
>>>>>
>>>>> Has anyone encoutered such a leak ?
>>>>>
>>>>> [1]
>>>>> https://framadrop.org/r/_7VsZtvzdU#+eJHHPPOIdVcgj/AUp8V91T9m6gmO7/XCh6uOhzP7ro=
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Michaël
>>>>>
>>>>
>>>>
>>>
>>
>>
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>>
>> --
>> Matthias Kuhn
>> OPENGIS.ch - https://www.opengis.ch
>> Spatial • (Q)GIS • PostGIS • Open Source
>>
>>
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>
>
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