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.scho...@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 > _______________________________________________ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
