On Wed, 28 Apr 2004, Jie Liang wrote:

> All,
> After I upgraded postgres from 7.3.4 to 7.4.2, one of my program got following error:
> DRROR:        out of memory
> DETAIL:       Fail on request of size 92.
> any idea??
> does memory management have big difference between 7.3.4 and 7.4.2???
> this program using a chunk of share memory and a lot of temp tables.

More than likely this is a hash aggregate problem (or can they spill to 
disk in 7.4.2 yet?  I don't think they can, but maybe we should ask Tom.

Try setting this before running the query and see what happens:

set enable_hashagg = false;

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