[Qgis-user] QGIS mapserver performance

[Andreas Neumann]

Hi Stefan,

There are some performance bottlenecks regarding clipping of larger/more 
complex polygons. Marco can tell you more.

What exactly do you mean by "rendering straight from postgis"? What 
software is rendering straight from Postgis? UMN Mapserver, or what 
other renderer? Or your own renderer?

Andreas

On 3/20/11 2:44 PM, Ziegler Stefan wrote:
> Hi
>
> I have some questions concerning the performance of qgis mapserver: Using layers with a small amount of polygons I do not see a big difference between rendering the same layer straight from postgis and from local qgis mapserver installation. For a layer with some 400'000 polygons it takes approx. 4 seconds from qgis mapserver (even for large scales with only some polygons to render). But it only takes some fractions of a second when the layer is rendered straight from postgis (and growing with smaller scales ->  more polyons).
>
> Everything is running on a dual core laptop. So there should be no big download bottleneck. No special styles are applied to the layers (just a simple fill and an outline). Are there some requests in addition to "GetMap"? Or what's responsible for this big difference?
>
> regards
> Stefan
>
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