I'm not sure, but I think for the zoomed out images, they have already
been rendered before, so you just get the cached images in browser or
so. and as for the zoomed images, they have to be rendered first.
To check that out, clear the cache of the browser and request the zoomed
out image and see if it also takes so long. I'd suggest you use some
caching server between map server and your web application
Moataz
Kiks wrote:
Hi to all,
I've got a developer configuration with MapServer+OpenLayers+SQL Server
Express 2008 for spatial data.
I catch raster data from Google Maps.
I have noticed that when I zoom in, performances decrease a lot, also if
there aren't so many graphical elements to get. More I zoom in, more
performances decrease.
Indexes on SQL are ok (I think).
No projection transform is performed.
The strange is that if I make the same call from the browser URL to
MapServer with a WMS GetMap, the response is immediate, for this matter I
think that there is something to optimize in my OpenLayer code, that anyway
is works correctly, but slow.
Any suggestion on what to check?
Thanks,
Kiks
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