[mapserver-users] WMS Server Optimization?

[Rahkonen Jukka (Tike)]

Hi,

Check from the Apache access.log what kind of WMS requests AutoCad is sending.  That should give a hint about how it is so heavy.

Png format is about the worst of all for server usage because the whole image data must be decompressed for each request. You will find easily recipes for creating tiled and perhaps compressed tiffs with overviews for Mapserver from the mail archives.

-Jukka Rahkonen-

gom wrote:

 
> I have created a Mapserver site and published a couple of large raster layers
> through WMS.  They work as expected and perform quiite well.
> 
> When i add the wms layers to Gaia or to Global Mapper they add and display
> great.  I want to display the layers in AutoCAD Map.  When I add the WMS layer
> there it takes 1.5 to 3 minutes to add the layer.  After that it works fine.  No
> other WMS layers behave like that in AutoCAD Map and as I mentioned
> previously, the layers don't work like that in any other program.
> 
> The layers are made up of about 1600 PNG images that are referenced in the
> .map file by tileindexes.  One layer is at 2 metre pixels and the other at 5 metre
> pixels.  If I remove the layer that references the 2 metre images and only use the
> 5 metre images, the layer is attached quite quickly.  If I switch and use only the 2
> metre image layer the speed is slow again.
> 
> My output format is PNG8.
> The images are stored in the same projection as they are being queried.
> I have added the wms_extents metadata to each layer.
> The MAXGEOWIDTH is such that no data is queried on inital loading of the layer.
> 
> I have asked the question in the AutoCAD support forums, from the AutoCAD
> MAp perspective, but was hoping there might be some suggestions as to
> configuration/map options, in Mapserver, that might help speed up this
> operation.
> 
> Thanks
> 
> 
> 
> --
> View this message in context: http://osgeo-org.1560.x6.nabble.com/WMS-
> Server-Optimization-tp5132723.html
> Sent from the Mapserver - User mailing list archive at Nabble.com.
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