On Tue, 26 Jun 2007, Tom Lane wrote:

I have no doubt that there are scenarios such as you are thinking about,
but it definitely seems like a corner case that doesn't justify keeping
the all-buffers scan.  That scan is costing us extra I/O in ordinary
non-corner cases, so it's not free to keep it.

And scenarios I'm concerned about but can't diagram as easily fall into this category as well. I agree that a LDC enabled config would ship with the all-buffers scan turned off as redundant and wasteful, in which the only cost to keep it is code baggage. But the fact that there are corner cases floating around this area is what makes me feel that removing it altogether is still a bit premature.

* Greg Smith [EMAIL PROTECTED] http://www.gregsmith.com Baltimore, MD

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