Re: Clock sweep not caching enough B-Tree leaf pages?

On Thursday, April 17, 2014, Merlin Moncure <mmoncure@gmail.com> wrote:
>
> no -- I got you. My point was, that's a pure guess unless you base it
> on evidence recorded on the page itself.  Without that evidence,
> (which requires writing) the operating is in a a better place to make
> that guess so it's probably better to defer that decision.
>

Well, we'd only need that info to be stored in the buffer cache somehow-
wouldn't have to go to disk or cause more I/O, of course. My thinking was
that we could track it with the existing counter too, avoiding even that
small amount of locking to write to the buffer page.

Thanks,

Stephen