"Barry Lind" <[EMAIL PROTECTED]> writes:
> ...  On a hunch I switched the jdbc driver to using the V2 protocol
> and the load on the machine dropped down to what it was when using
> Oracle and everything was fine.

First knee-jerk reaction is that it's an optimization problem stemming
from V3 protocol feeding parameterized queries to the backend where V2
did not, and the planner being unable to cope :-(

Can you identify the specific queries causing the problem?

                        regards, tom lane

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