Robert Haas <[email protected]> writes:
> On Fri, Jan 14, 2011 at 1:42 PM, Tom Lane <[email protected]> wrote:
>> Um, yeah, I think you're having a problem keeping all the ideas straight
>> ;-). The argument about forensics has to do with how soon we're willing
>> to freeze tuples, ie replace the XID with a constant. Not about hint
>> bits.
> Those things are related, though. Freezing sooner could be viewed as
> an alternative to hint bits.
Freezing sooner isn't likely to reduce I/O compared to hint bits. What
that does is create I/O that you *have* to execute ... both in the pages
themselves, and in WAL.
regards, tom lane
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