[QGIS-Developer] QGIS Server 3 status

[Burghardt.Scholle at stadt.wolfsburg.de]

Hi,

oh, shame on me. Of course I meant "FcgidInitialEnv QGIS_SERVER_PARALLEL_RENDERING True"! 
Please excuse me and thank you for the hint with the log level. I will try it.

Burghardt

> -----Ursprüngliche Nachricht-----
> Von: David Marteau [mailto:dmarteau at 3liz.com]
> Gesendet: Montag, 9. Oktober 2017 12:19
> An: Scholle, Burghardt (15-3 GIS)
> Cc: qgis-developer at lists.osgeo.org
> Betreff: Re: [QGIS-Developer] QGIS Server 3 status
> 
> Hi
> 
> According to the source
> https://github.com/qgis/QGIS/blob/master/src/server/qgsserversettings.cp
> p#L47: setting QGIS_SERVER_PARALLEL_RENDERING to False or not setting
> QGIS_SERVER_PARALLEL_RENDERING is the same thing as the default value
> is 'false'.
> 
> Using the appropriate log level you can get metric on the rendering time
> from qgis: imho, comparing this metric would be a good starting point putting
> aside external configuration (except for the postgres connection) and isolate
> any bottleneck.
> 
> David.
> 
> > Le 9 oct. 2017 à 11:53, <Burghardt.Scholle at stadt.wolfsburg.de>
> <Burghardt.Scholle at stadt.wolfsburg.de> a écrit :
> >
> > Hi David,
> >
> > I will answer you directly and give you the desired information. I've done
> some tests with a sample application, which you can see under the URL
> https://lxgis1.stadt.wolfsburg.de/qgis_wcl/index.html.
> > The map topic "Stadtplan" is based on the qgis server 2.14.19, the
> "Stadtplan (Dev)"-topic is based on qgis server 2.99 (codeversion 825a323).
> Subsequent tests I've done with the layers "Luftbilder" and "Infrastruktur".
> The former are geotiff's, the latter are generated from a PostGIS database.
> As client I use a customized version of the "OL3 Mobile Client" from
> Sourcepole.
> >
> > If I look at the access times in the developer tools of the Firefox, they
> speak a clear language:
> > - Topic "Stadtplan" -> moving the map, zoom in / zoom out takes about
> > 0.5 s on the intranet (!)
> > - Topic "Stadtplan (Dev)" -> moving the map, zoom in / zoom out takes
> > about 1.2 s with the setting "FcgidInitialEnv
> > QGIS_SERVER_PARALLEL_RENDERING False" in my apache config
> > - Without setting "FcgidInitialEnv QGIS_SERVER_PARALLEL_RENDERING
> > False" the access takes about 0.7 s
> > Result: without using multiprocessing / multithreading, the QGIS server is
> faster under these test conditions, but still clearly slower than the older
> version!
> >
> > Hope this description helps
> >
> > Burghardt
> >
> > ***************
> >
> > Burghardt Scholle
> > mailto:burghardt.scholle at stadt.wolfsburg.de
> >
> >> Hi,
> >>
> >> Do we have metrics on this ?  Does it mean  that
> QGIS_SERVER_PARALLEL_RENDERING=False is also slower than previous
> version ?
> >>
> >>
> >> David M.
> >>
> >>
> >>
> >>> Le 4 oct. 2017 à 14:15, Matthias Kuhn <matthias at opengis.ch> a écrit :
> >>>
> >>> Hi,
> >>>
> >>> I had some questions from people interested in performance.
> >>>
> >>> I advised them to set the following
> >>>
> >>> * QGIS_SERVER_PARALLEL_RENDERING=True
> >>> * Trust project flag
> >>>
> >>> Apparently parallelized rendering works (system stats) but it was
> >>> reported to be slower than older versions.
> >>>
> >>> Is there something else that needs to be done? Is there more
> >>> information I can ask for / give?
> >>>
> >>> Thanks a lot
> >>> Matthias
> >>
> >
> >
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