[OSM-dev] osm2pgsql slow on update import

[Lennard]

On 7-5-2011 18:46, Sven Geggus wrote:
> Jukka Rahkonen<jukka.rahkonen at latuviitta.fi>  wrote:
>
>> Am I right in thinking that if there were suitable diffs available it
>> would be much faster to update directly the osm_point, osm_line and
>> osm_polygon tables without going through osm_points, osm_ways and
>> osm_rels?
>
> This would not work because these tables are different depending on
> the stylefile used.

Fully self-referential diffs would be good for one thing: no need to 
fetch the unchanged nodes of a way to rebuild the geometry.

They would potentially be much much larger than the current diffs, so 
that's a clear argument against them.

-- 
Lennard