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Posted to dev@lucene.apache.org by "David Smiley (JIRA)" <ji...@apache.org> on 2017/01/25 21:20:27 UTC
[jira] [Commented] (SOLR-10038) Spatial Intersect Very Slow For
Large Polygon and Large Index
[ https://issues.apache.org/jira/browse/SOLR-10038?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15838607#comment-15838607 ]
David Smiley commented on SOLR-10038:
-------------------------------------
Wow; 3 minutes for 10k points. Roughly how many vertices are on the polygon?
https://cwiki.apache.org/confluence/display/solr/Spatial+Search
There are some tricks to speed up polygonal search. One is setting "autoIndex" on the field. (no re-index required). Just set that the true and leave it. Then, fiddle with either distErr or distErrPct to get the precision you want and no more than you need. Lastly, fiddle with prefixGridScanLevel -- set it to the grid level that the internal algorithm switches from recursive decomposition to scanning. If you have a 20 level prefixTree, I recall it defaults to 4 off from the bottom, thus 16.
> Spatial Intersect Very Slow For Large Polygon and Large Index
> -------------------------------------------------------------
>
> Key: SOLR-10038
> URL: https://issues.apache.org/jira/browse/SOLR-10038
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: spatial
> Affects Versions: 6.4.0
> Environment: Linux Ubuntu + Solr 6.4.0
> Reporter: samur araujo
> Labels: spatialsearch
>
> Hi all, I have indexed the entire geonames points (lat/long) with JTS enabled, and I am trying return all points (geonameids) within a certain polygon (e.g. Netherlands country polygon). This query takes 3 minutes to return only 10.000 points. I am using only solr intersect. no facets. no extra fitering.
> Is there any configuration that could slow down such a query to less than 300 ms?
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