[Qgis-user] QGIS slows PC to a point it is unusable

[Nicolas Cadieux]

Hi,

Try going into the computer bios. Perhaps you can reduce the memory allocation for the video card.  Nice to know GeoPackage option seems to help.

Nicolas Cadieux

> Le 10 janv. 2020 à 03:01, Peter Cornelissen <peter at cornelissen.org.uk> a écrit :
> 
> 
> Sorry I meant to say that the memory IS the problem!!
> 
> On 10 Jan 2020 07:58, peter at cornelissen.org.uk wrote:
> Hi guy
> 
> Thanks for the feedback. I've checked and as my PC slows down it reaches the point where QGIS is using 79% of the memory, so there's no problem. Unfortunately there's not much I can do about it as it is a laptop and is already at its maximum of 8GB and is using 1.8GB for the video. I'll rebuild using Geo Packages as that seems like the way forward. I can't really make use of PostGIS as I need to port to QField.
> 
> Peter
> 
> On 9 Jan 2020 23:54, Nicolas Cadieux <nicolas.cadieux at archeotec.ca> wrote:
> Hi,
> 
> You are likely running out of memory.  Do a control-alt-delete and look at the memory usage.  Look at the memory, disk and cpu usage before starting QGIS and once the project is loaded and working.  Turn off unwanted plugins.  Make sure you don’t have a virus or some background process using your cpus. You should probably have 8 to 16 GB of memory.  Is this a laptop?  Is the laptop sharing the video memory with the system memory?
> 
> Nicolas Cadieux
> 
> Le 9 janv. 2020 à 18:21, Alexandre Neto <senhor.neto at gmail.com> a écrit :
> 
> 
> Hi Peter,
> 
> Try to use Spatialite, Geopackage or (even better) PostGIS to store your data and create indexes both on the geometries, but also on the fields used on the rules you mentioned. That can give you a nice boost.
> 
> Hope it helps,
> 
> Alexandre Neto
> QGIS Support
> www.QCooperative.net
> 
> A quinta, 9/01/2020, 20:42, Peter Cornelissen <peter at cornelissen.org.uk> escreveu:
> Hi
> 
> I am finding that although my ShapeFIle tables in QGIS are not huge, my Windows 10 PC virtually comes to a grinding halt and becomes unusable once I get to something like 50 layers. I am using about 6 or 7 ShapeFiles with different filters. I think it is related to the fact that approx. most of them having a rule based styles, some with about 20 rules per layer.
> 
> Restarting the PC sorts things out for a while, but soon as I start working on the project it quickly gets slower and again comes to a point where it again slows right down.
> 
> I've not seen anything relate to this issue online and I've seen tables which must be huge. Is it likely to be my PC or am I using the wrong methods? Would I be better using SpatiaLite to store the tables?
> 
> Thought?
> 
> Peter
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