dumping 8M bit fields

Hi, I have a table with 8M rows and one of the fields is a bit (1024
bits) field. I am trying to dump the bit field for 8M rows to a file:

psql -U cicc3 -A -F " " -t -o pubchem.fp -c "select cid,gfp from
pubchem_compound;

However I get

out of memory for query result

I am surprised since I did an equivalent query but selecting varchar
field for 6.9M rows which worked fine.

The machine is a 4-cpu Opteron machine, 16GB RAM.

Does anybody know why this might be the case?

Thanks,

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Rajarshi Guha <rguha(at)indiana(dot)edu>
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