| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Greg Stark <stark(at)mit(dot)edu>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: An idle thought |
| Date: | 2010-03-22 21:35:00 |
| Message-ID: | 1269293700.4053.6031.camel@monkey-cat.sm.truviso.com |
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| Lists: | pgsql-hackers |
On Mon, 2010-03-22 at 16:48 -0400, Bruce Momjian wrote:
> I don't think we want to move to 64-bit xids becasue we would still need
> to do vacuum freeze to trim the clog. In fact we do vacuum freeze much
> more frequently than required for 32-bit xids for this very reason.
Good point. I think there are a lot of issues like this, which would
make storing the visibility information separate from the heap a huge
undertaking. Still worth thinking about, though.
Regards,
Jeff Davis
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