I'm having a problem with a queyr like: INSERT INTO FACT (x,x,x,x,x,x) SELECT a.key,b.key,c.key,d.key,e.key,f.key from x,a,b,c,d,e,f where x=a and x=b .... -- postgres7.4 is running out of memory. I'm not sure why this would happen -- does it buffer the subselect before doing the insert?
Things are pretty big scale: 3gb ram, 32768 shared buffers, 700gb disk, millions of rows in the tables.
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