[gdal-dev] Memory increase in postgis raster driver

[jramm]

Hi 
We have been looking into this problem some more.

So it seems we can reproduce this by using postgis raster tiles of 100 x
100.
raster2pgsql cmd was:
raster2pgsql bigtiff.tif -C -r -s 27700 -t 100x100 -P -I -M -Y
<schema.tablename> | psql <connection details>

The effect seems more pronounced using GDAL 2.2 (trunk) vs GDAL 2.1

With a tilesize of 256*256 it is fine. 

This is a very large tif btw; ~150000 x 200000 pixels





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