MapGuide unresponsive using GDAL provider (related to ticket #462)

[ismael]

When using rasters (MrSID, tiff) in MapGuide, the service becomes unresponsive very quickly. Turning raster layers on/off and panning in the viewer causes following error:

Cannot create any more connections to the OSGeo.Gdal FDO provider.

When putting the GDAL provider to the list of DataConnectionPoolExcludedProviders the problem did not occur anymore at first glance (became more stable anyway).

Problem occurred with following configuration:

• MGOS 2.1 + .NET configuration
• IIS 6.0
• Windows Server 2003 SP2 (Virtual Machine)
• 2GB RAM
• Dual Core processor

[ismael]

Although adding the GDAL provider to the list of DataConnectionPoolExcludedProviders seems to make MapGuide more stable the crash still occurs under heavy load (more than 10 users). Disabling connection pooling completely seems to make it more stable:

​http://lists.osgeo.org/pipermail/mapguide-users/2009-December/020704.html

[zspitzer]

I have had success with 2.2 RC2 following this guide ​http://trac.osgeo.org/mapguide/wiki/MGOS22GdalProvider

You have to nearly always manually override the co-ordinate system as it's not being read properly