On Mar 6, 2007, at 10:56 AM, Jeff Davis wrote:
We also don't need an exact count, either. Perhaps there's some way
we could keep a counter or something...

Exact count of what? The pages already in cache?

Yes. The idea being if you see there's 10k pages in cache, you can likely start 9k pages behind the current scan point and still pick everything up.

But this is nowhere near as useful as the bitmap idea, so I'd only look at it if it's impossible to make the bitmaps work. And like others have said, that should wait until there's at least a first- generation patch that's going to make it into 8.3.
Jim Nasby                                            [EMAIL PROTECTED]
EnterpriseDB      http://enterprisedb.com      512.569.9461 (cell)

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