Alvaro Herrera <[EMAIL PROTECTED]> writes:
> A quickie: this item
> Store only active XIDs in subtransaction cache
> was already done:

I think Bruce is referring to the idea that you and I each arrived at
recently, ie removing subcommitted subxact XIDs from the PGPROC cache
if they hadn't stored any tuples.  That certainly wasn't done by my
commit you mention ... did you do it when I wasn't looking?

                        regards, tom lane

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TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not

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