[gdal-dev] warp memory limit default too low and does not have a config option

Etienne Tourigny etourigny.dev at gmail.com
Sun Feb 5 20:41:40 EST 2012

Hi all,

The default memory limit for warp operations is 64MB, which is far too
low using recent hardware and leads to inefficiencies in I/O when
warping large images.

This can be changed using the -wm option of gdalwarp, or if using the
API change the value of GDALWarpOptions::dfWarpMemoryLimit.
More information here:

However, it would be better to do both of the following:

1) Change the default value of 64 MB to something higher, perhaps
depending on the machine's configuration (say 1/4 of RAM) - this
possibility is mentioned in gdalwarpoperation.cpp  .
2) Add a config option so that the default can be set for all
operations by the user (which overrides 1, but can be overridden for
each operation)

Any comments?


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