[postgis-users] Query performanace against huge point table

[Gregory Williamson]

Kevin Neufeld wrote:

> 
> Yes, clustering your table based on your GIST index does help because it 
> physically orders the rows in your table based on the spatial index.  
> The disk head won't have far to move to retrieve the next page. 
> 

Does this apply to GIST indexes in general or are points a case that benefits particularly ?

We tend to have fairly static spatial datasets that get augmented periodically and this might be of use it applies to polygon data as well.

Thanks,

Greg Williamson
Senior DBA
GlobeXplorer LLC, a DigitalGlobe company

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