If I understood correctly, Josh was complaining about VACUUM sucking too
>much of his disk bandwidth. autovacuum wouldn't help that --- in fact
>would likely make it worse, since a cron-driven vacuum script can at
>least be scheduled for low-load times of day. autovacuum is likely to
>kick in at the least convenient times.
>However, we have at this point got only speculative solutions to the
>too-much-bandwidth problem. If we had something ready to go today,
>I'd be as willing as the next guy to cram it into 7.4. I'm not willing
>to go back into development mode for 7.4, though.
> regards, tom lane
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