Re: 8.4 open item: copy performance regression?

Stefan Kaltenbrunner <stefan@kaltenbrunner.cc> writes:
>    and I believe I have seen the "more IO with 8.4" thing here too but I 
> have not actually paid enough attention yet to be sure.

FSM/VM overhead maybe?  I think COPY IN is setting the SKIP_FSM bit,
but I wonder if there's some vestigial overhead anyway.
        regards, tom lane