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https://issues.apache.org/jira/browse/JENA-1277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15821712#comment-15821712
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Osma Suominen edited comment on JENA-1277 at 1/13/17 12:28 PM:
---------------------------------------------------------------
I dropped the {{distSort}} parameter from the method call, and the query
response time was reduced to below 200 ms!
I suppose the sort order of Lucene spatial results shouldn't matter in
jena-spatial? After all, they are just raw material for the SPARQL engine and
the real order is specified (or not) using ORDER BY.
was (Author: osma):
I dropped the {{distSort parameter}} from the method call, and the query
response time was reduced to below 200 ms!
I suppose the sort order of Lucene spatial results shouldn't matter in
jena-spatial? After all, they are just raw material for the SPARQL engine and
the real order is specified (or not) using ORDER BY.
> Spatial Queries Very Slow For Large Databases
> ---------------------------------------------
>
> Key: JENA-1277
> URL: https://issues.apache.org/jira/browse/JENA-1277
> Project: Apache Jena
> Issue Type: Improvement
> Components: Spatial
> Affects Versions: Jena 3.1.1
> Environment: Linux Ubuntu
> Reporter: samur araujo
> Attachments: spatial-assembler.ttl
>
>
> I loaded geonames on Jena but the spatial queries take more than 3s to
> execute. The query is below:
> PREFIX spatial: <http://jena.apache.org/spatial#>
> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
> SELECT distinct ?place
> {
> ?place spatial:intersectBox (32.55668 -117.12865 32.56668 -117.13865) .
>
> }
> The data can be downloaded here:
> https://drive.google.com/file/d/0B-fwYPJYT1GOYVVIZF9ROUxzclk/view?usp=sharing
> For small datasets the queries are executed in 200ms, very fast. I noticed
> that when I access the lucene index directly the queries are also very fast,
> about 20ms.
> The issue may be related to the pos-processing of lucene results.
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