Bug report #13444

Very large QGIS project memory usage

Added by Bruce Steedman about 7 years ago. Updated about 7 years ago.

Affected QGIS version:2.10.1 Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:21491


A project I am using is currently using upwards of 5GB RAM (nearly 7GB to load). With my system's 4GB RAM this makes QGIS near unusably slow and I assume that this cannot be normal, given the relatively modest size of the project.

QGIS uses < 200MB alone (no project loaded) so I deduce that the usage is project related. My project (1.8 MB) is attached. It uses vector layer .json files defined in a LAYERS folder (741 MB) here: https://www.dropbox.com/sh/gyitunc7uymcv87/AADCGlSDYzhZbLq9Ey-iTQ-Ua?dl=0

It also uses a PostGIS layer 'planning apps' from an AWS-hosted server in a group called PLANNING APPS.

My configuration is as follows:

Hardware: MacBook Air, 2.13 GHz Intel Core 2 Duo CPU, 4GB RAM
OS: Mac OS X 10.10.5
QGIS: 2.10 KyngChaos build, installed via Homebrew Cask (no 3rd party plugins)

QGIS version 2.10.1-Pisa QGIS code revision
Compiled against Qt 4.8.6 Running against Qt
Compiled against GDAL/OGR 1.11.2 Running against GDAL/OGR
Compiled against GEOS 3.4.2-CAPI-1.8.2 Running against GEOS
PostgreSQL Client Version 9.4.4 SpatiaLite Version
QWT Version 6.0.2 PROJ.4 Version
QScintilla2 Version 2.9

Any help with this would be very much appreciated, as I cannot use QGIS with this level of memory usage.


#1 Updated by Saber Razmjooei about 7 years ago

  • Status changed from Open to Feedback

It is worth looking into a vector file format which supports spatial indexing (e.g. Spatialite).
The following 2 layers Gazetteer and Coastline json layers took up 1.1 GB of RAM when zooming and panning. With Spatialite, it was down to 110 MB!

#2 Updated by Bruce Steedman about 7 years ago

  • Status changed from Feedback to Closed

Many thanks for your answer Saber. I've now used ogr2ogr to convert the data to PostgreSQL database records and the problem is solved.

Also available in: Atom PDF