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    <div class="moz-cite-prefix">Look, don't throw good money after bad.
      <br>
    </div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">You're only going to be able to get so
      much memory in a laptop. If you want to do RAM-intensive things
      and don't have a way to make them less intensive (i.e., offloading
      some of the business to PostGIS, etc.) then you're going to need
      to be thinking about hardware that can hold a lot of memory and
      just using your laptop as a frontend. I also can't recommend
      getting away from spinny-thing storage enough unless you simply
      need to store as many TiB in as small a space as possible.<br>
    </div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">I will also heartily recommend getting
      Windows and other Microsoft products out of your life. I have a
      Gentoo Linux machine sitting beside me here with a full GUI going
      and it's running on less than 1GiB of its 16GiB of RAM. The
      PostGIS machine next to it that has no GUI is taking 256<u><b>M</b></u>iB
      of its 16GiB. <br>
    </div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">On 1/10/20 10:45 AM, Peter Cornelissen
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:HE1PR0802MB2617364CF85324F243DAD047BE380@HE1PR0802MB2617.eurprd08.prod.outlook.com">
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        <span>HI Nicolas</span></div>
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        <span>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.</span></div>
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        <span><br>
        </span></div>
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        <span>Peter</span></div>
      <hr style="display:inline-block;width:98%" tabindex="-1">
      <div id="divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
          face="Calibri, sans-serif" color="#000000"><b>From:</b>
          Nicolas Cadieux <a class="moz-txt-link-rfc2396E" href="mailto:nicolas.cadieux@archeotec.ca"><nicolas.cadieux@archeotec.ca></a><br>
          <b>Sent:</b> 10 January 2020 12:42<br>
          <b>To:</b> Peter Cornelissen <a class="moz-txt-link-rfc2396E" href="mailto:peter@cornelissen.org.uk"><peter@cornelissen.org.uk></a><br>
          <b>Cc:</b> Alexandre Neto <a class="moz-txt-link-rfc2396E" href="mailto:senhor.neto@gmail.com"><senhor.neto@gmail.com></a>; QGIS
          User <a class="moz-txt-link-rfc2396E" href="mailto:qgis-user@lists.osgeo.org"><qgis-user@lists.osgeo.org></a><br>
          <b>Subject:</b> Re: [Qgis-user] QGIS slows PC to a point it is
          unusable</font>
        <div> </div>
      </div>
      <div dir="auto">Hi,
        <div><br>
          <div>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.<br>
            <br>
            <div dir="ltr">Nicolas Cadieux</div>
            <div dir="ltr"><br>
              <blockquote type="cite">Le 10 janv. 2020 à 03:01, Peter
                Cornelissen <a class="moz-txt-link-rfc2396E" href="mailto:peter@cornelissen.org.uk"><peter@cornelissen.org.uk></a> a écrit :<br>
                <br>
              </blockquote>
            </div>
            <blockquote type="cite">
              <div dir="ltr">
                <div dir="auto">Sorry I meant to say that the memory IS
                  the problem!!</div>
                <div class="x_gmail_extra"><br>
                  <div class="x_gmail_quote">On 10 Jan 2020 07:58,
                    <a class="moz-txt-link-abbreviated" href="mailto:peter@cornelissen.org.uk">peter@cornelissen.org.uk</a> wrote:<br
                      type="attribution">
                    <blockquote class="x_quote" style="margin:0 0 0
                      .8ex; border-left:1px #ccc solid;
                      padding-left:1ex">
                      <div dir="auto">Hi guy
                        <div dir="auto"><br>
                        </div>
                        <div dir="auto">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.</div>
                        <div dir="auto"><br>
                        </div>
                        <div dir="auto">Peter</div>
                      </div>
                      <div><br>
                        <div class="x_elided-text">On 9 Jan 2020 23:54,
                          Nicolas Cadieux
                          <a class="moz-txt-link-rfc2396E" href="mailto:nicolas.cadieux@archeotec.ca"><nicolas.cadieux@archeotec.ca></a> wrote:<br
                            type="attribution">
                          <blockquote style="margin:0 0 0 0.8ex;
                            border-left:1px #ccc solid;
                            padding-left:1ex">
                            <div dir="auto">Hi,
                              <div><br>
                                <div>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?<br>
                                  <br>
                                  <div dir="ltr">Nicolas Cadieux</div>
                                  <div dir="ltr"><br>
                                    <blockquote>Le 9 janv. 2020 à 18:21,
                                      Alexandre Neto
                                      <a class="moz-txt-link-rfc2396E" href="mailto:senhor.neto@gmail.com"><senhor.neto@gmail.com></a> a
                                      écrit :<br>
                                      <br>
                                    </blockquote>
                                  </div>
                                  <blockquote>
                                    <div dir="ltr">
                                      <div dir="auto">
                                        <div dir="auto">Hi Peter,</div>
                                        <div dir="auto"><br>
                                        </div>
                                        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.
                                        <div dir="auto"><br>
                                        </div>
                                        <div dir="auto">Hope it helps,</div>
                                        <div dir="auto"><br>
                                        </div>
                                        <div dir="auto">Alexandre Neto</div>
                                        <div dir="auto">QGIS Support</div>
                                        <div dir="auto"><a
href="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"
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                                      <div class="x_elided-text">
                                        <div dir="ltr">A quinta,
                                          9/01/2020, 20:42, Peter
                                          Cornelissen <<a
                                            href="mailto:peter@cornelissen.org.uk"
                                            moz-do-not-send="true">peter@cornelissen.org.uk</a>>
                                          escreveu:<br>
                                        </div>
                                        <blockquote style="margin:0 0 0
                                          0.8ex; border-left:1px #ccc
                                          solid; padding-left:1ex">
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                                              background-color:rgb(255
                                              ,255 ,255)">
                                              Hi</div>
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                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
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                                              ,255 ,255)">
                                              <br>
                                            </div>
                                            <div style="color:rgb(0 ,0
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                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
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                                              ,255 ,255)">
                                              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.</div>
                                            <div style="color:rgb(0 ,0
                                              ,0); font-family:'calibri'
                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
                                              font-size:12pt;
                                              background-color:rgb(255
                                              ,255 ,255)">
                                              <br>
                                            </div>
                                            <div style="color:rgb(0 ,0
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                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
                                              font-size:12pt;
                                              background-color:rgb(255
                                              ,255 ,255)">
                                              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.</div>
                                            <div style="color:rgb(0 ,0
                                              ,0); font-family:'calibri'
                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
                                              font-size:12pt;
                                              background-color:rgb(255
                                              ,255 ,255)">
                                              <br>
                                            </div>
                                            <div style="color:rgb(0 ,0
                                              ,0); font-family:'calibri'
                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
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                                              background-color:rgb(255
                                              ,255 ,255)">
                                              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?</div>
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                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
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                                              <br>
                                            </div>
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                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
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                                              ,255 ,255)">
                                              Thought?</div>
                                            <div style="color:rgb(0 ,0
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                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
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                                              <br>
                                            </div>
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                                              ,'arial' ,'helvetica'
                                              ,sans-serif;
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                                              ,255 ,255)">
                                              Peter</div>
                                          </div>
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