> What are you envisioning exactly?  If vacuum finds any reason to dirty
> a page (or it's already dirty), then freeze everything on the page that's
> got age > some lower threshold?

I was envisioning, if the page is already dirty and in memory *for any
reason*, the freeze rows at below some threshold.

-- 
Josh Berkus
PostgreSQL Experts Inc.
www.pgexperts.com

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