[GRASS-dev] Re: [GRASS-user] Maximum number of points for
v.what.rast
Moritz Lennert
mlennert at club.worldonline.be
Mon May 2 05:00:41 EDT 2011
On 30/04/11 21:50, Rebecca Bennett wrote:
> hello there,
>
> Does anyone know the maximum number of points that v.what.rast can handle?
> I have a file of 600,000+ points that fails to run (12hrs 100% CPU and
> nothing) and I wonder, before I start with trial and error, if anyone
> knows the answer?
There is no fixed maximum number of points. My guess would be that the
time needed really depends on the database backend and whether there is
an index on the category column.
Which backend are you using ? Which process is running during all this
time ?
The module executes each individual update query one at a time. Maybe it
might be more efficient to group them into a temporary file with the SQL
statements and then run that all at once ?
Moritz
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