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

[DelazJ]

Hi Peter,

Bernhard earlier suggested to run QGIS under a new user profile without any
third party plugins, because some plugins used to slow down QGIs due to
wrong memory management. Might be worth giving a shot if you didn't yet?

Regards,
Harrissou


Le ven. 10 janv. 2020 à 16:45, Peter Cornelissen <peter at cornelissen.org.uk>
a écrit :

> 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.cadieux at archeotec.ca>
> *Sent:* 10 January 2020 12:42
> *To:* Peter Cornelissen <peter at cornelissen.org.uk>
> *Cc:* Alexandre Neto <senhor.neto at gmail.com>; QGIS User <
> qgis-user at 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 <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
> <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 <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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