[FWTools] gdal_* translate and memory usage Ubuntu

Shaun Kolomeitz Shaun.Kolomeitz at epa.qld.gov.au
Tue Jan 9 19:05:45 EST 2007

Dear FWtools list,

I've setup an Ubuntu 6.10 (Edgy Eft) server on a Dual Xeon Dell (3.0Ghz)
machine with 4GB RAM and am comparing it to my FWtools install on Dual
Xeon (3.2Ghz) HP WindowsXP (4GB RAM).
On Windows I am able to allocate (using -config GDAL_CACHEMAX 512) MB of
memory for example, and it will happily use up to and sometimes over
this amount.
In Ubuntu however I only see the memory allocation go up to about 20 MB,
even if I renice the process to a maximum priority. Also converting
takes about twice the time on Ubuntu (even though the IO subsystem is
much faster - SCSI320, than my SATA2 Windows machine). Memory speed is
definitely faster, CPU slightly faster on my Win machine though.
Does anyone know if there are other settings in *nix that would affect
this, or is this running as one would expect ?
I have some screen snaps if this would help.

Many thanks,


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