<div dir="ltr"><div><span style="font-size:12.8px">Thanks for the responses so far!</span><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Adding a bit more information.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">We are using Dell PowerEdge-R430 [1] for the PostGIS server with OS Debian 8.7 on a 1gigabit network. For each topographic sheet we use one database, this means that we have hundreds of databases in production. We divide the databases in different ports by project, just for organization, I don't know if that impacts performance.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">As for clients we usually use Debian 8.4, Windows 7 or Windows 10 with latest LTR QGIS. The clients are i7, 8gb RAM, 1gb video card.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">We didn't do any tuning in PostgreSQL, I will try out the suggestions. As configuration goes, we just disabled the Auto Vacuum, and run it by a script at night (when no one is connected) along with backup.</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">Then main problem that we are facing is slow saving time at peak hours (when about 50 clients are digitizing in different databases). Sometimes can take up to 1 minute to save all layers. We work with autosave in QGIS that saves every 5 minutes, so slow saving time is not ideal.</div><div style="font-size:12.8px">The reason that we save so much is that sometimes we have errors while saving, such as null geometries, that we cannot fix and we have to discard the edits. (also we have other errors that usually we discard the edits).</div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px"><br></div><div style="font-size:12.8px">[1] <a href="https://i.dell.com/sites/doccontent/shared-content/data-sheets/en/Documents/Dell-PowerEdge-R430-Spec-Sheet.pdf" target="_blank">https://i.dell.com/sites/d<wbr>occontent/shared-content/data-<wbr>sheets/en/Documents/Dell-Power<wbr>Edge-R430-Spec-Sheet.pdf</a></div></div><br><div><br></div><div><br></div><div>Thanks Mike, I sent an email there also.</div><div><br></div><div><br></div><div>Regards,</div><div>Felipe Diniz</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jun 15, 2017 at 2:53 PM, Michael Treglia <span dir="ltr"><<a href="mailto:mtreglia@gmail.com" target="_blank">mtreglia@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">The other thing I might suggest is writing the postgis-users list to get any input from there, especially on the database end of things: <a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.<wbr>org/mailman/listinfo/postgis-<wbr>users</a><div><br></div><div>Hope that helps!</div><div>Cheers,</div><div>mike</div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jun 15, 2017 at 1:49 PM, Árni Geirsson <span dir="ltr"><<a href="mailto:arni@alta.is" target="_blank">arni@alta.is</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hello Felipe<div>I use these systems but not at this large scale and can therefore probably not help you, but I find the question interesting. Could you be more specific about the performance and reliability bottlenecks that you would like to address? Have you experienced problems as the number of users grows?</div><div><br></div><div>Árni </div></div><div class="gmail_extra"><br clear="all"><div><div class="m_327705316090418997m_-5321553198048895459gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><br></div><font color="#000000">Árni Geirsson</font><br><span style="color:rgb(102,102,102);font-size:x-small"><font color="#666666"><b>Alta ehf</b> // <a href="tel:+354%20582%205000" value="+3545825000" target="_blank">+354 582 5000</a> // <a href="tel:+354%20897%209549" value="+3548979549" target="_blank">+354 897 9549</a></font></span></div></div></div></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote"><div><div class="m_327705316090418997h5">On 15 June 2017 at 17:25, Cap Diniz <span dir="ltr"><<a href="mailto:diniz.felipe@eb.mil.br" target="_blank">diniz.felipe@eb.mil.br</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="m_327705316090418997h5"><div dir="ltr">Hello,<div><br></div><div>I am from the Cartographic Production Department from the Brazilian Army, and we are trying to migrate from ArcGIS to QGIS+PostGIS.</div><div><br></div><div>We are currently using QGIS 2.14.15, and we mostly do data digitizing over an orthoimage. We have about 50 simultaneous users in a single PostGIS server, but in different databases.</div><div><br></div><div>I would like to know if there are any tips to improve performance and QGIS reliability, such as tuning PostgreSQL, operating systems, hardware recommendations, or QGIS specifics.</div><div><br></div><div><br></div><div>Regards,</div><div>Felipe Diniz</div></div>
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