HI Nicolas

Thanks. I'm not happy about messing with the bios though, I think I'll leave 
that and consider a new laptop with more memory. I'll see how it goes using 
GeoPackage to startw thi and take it from there.

Peter
________________________________
From: Nicolas Cadieux <nicolas.cadi...@archeotec.ca>
Sent: 10 January 2020 12:42
To: Peter Cornelissen <pe...@cornelissen.org.uk>
Cc: Alexandre Neto <senhor.n...@gmail.com>; QGIS User 
<qgis-user@lists.osgeo.org>
Subject: Re: [Qgis-user] QGIS slows PC to a point it is unusable

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 <pe...@cornelissen.org.uk> a écrit :


Sorry I meant to say that the memory IS the problem!!

On 10 Jan 2020 07:58, pe...@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.cadi...@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.n...@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<https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsmex-ctp.trendmicro.com%3A443%2Fwis%2Fclicktime%2Fv1%2Fquery%3Furl%3Dhttp%253a%252f%252fwww.QCooperative.net%26umid%3D78acbac1-d0a0-4165-8391-f7bc9498c22c%26auth%3Dbf81fa88bf46c441e3fa0c29e31e35617988196f-aeddc0339af5f50edc3ba0398521cba4a48bd09f&data=02%7C01%7C%7C0a6fe8d2bc5846f611a508d795ca9542%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637142569628060192&sdata=CIdLZHE1E%2FfBMx1H55Kjyuxd5BR4N%2BfUzoQMW51ViNg%3D&reserved=0>

A quinta, 9/01/2020, 20:42, Peter Cornelissen 
<pe...@cornelissen.org.uk<mailto:pe...@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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