Postgis ST_ConcaveHull Runtime GEOS Problem?
|Reported by:||tsw||Owned by:|
A concave hull query with the attached data set under Postgresql 9.4 / PostGIS 2.2 / Geos 3.5.0 runs in under a second.
The same query using the same data on Postgresql 9.6 / PostGIS 2.5.2 / GEOS 3.7.1 is still running after 30 minutes.
I've also attached a perf top screen shot which to me implies this is a GEOS problem.