On Mon, Jan 18, 2016 at 10:31 AM, Bart Verbeeck <Bart.Verbeeck@anonymised.com>
wrote:
Dear list
I have found some posts about sqlserver performance issues when doing wfs
requests an large datasets.
Sqlserver chooses a non-optimal queryplan when doing a spatial query with
sqlserver native paging.
Without native paging sqlserver is slow when performing non spatial
requests
This happens when geoserver sends a query with a combination of “SELECT
top xxx” and “SHAPE”.Filter(….).
This kind of query is slow because the queryplan decides not to use the
spatial index.
Unfortunately it is not possible to specify a query hint
[with(index(indexname))] because sqlserver throws an error when no spatial
filter is specified.
Did you use the spatial index forcing flag in the store configuration?
· What is the status of this issue?
Unknown.
Commercial databases data stores are normally worked on only on contract,
it's hard to convince anyone
to care/get excited for a commercial database in their own spare time.
You can look at the commercial support page to get someone look into the
issue for you http://geoserver.org/support/
Or you can just contribute changes yourself, everybody can participate, the
store is in GeoTools
and the rules to provide a code changes are here:
https://github.com/geotools/geotools/blob/master/CONTRIBUTING.md
It's probably not the answer you want (sorry about that!) but it's at least
a way forward.
Cheer
Andrea
--
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http://goo.gl/it488V for more information.
Ing. Andrea Aime
@geowolf
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