| From: | Dan Ports <drkp(at)csail(dot)mit(dot)edu> |
|---|---|
| To: | Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> |
| Cc: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: SSI predicate locking on heap -- tuple or row? |
| Date: | 2011-06-02 21:37:50 |
| Message-ID: | 20110602213749.GB10064@csail.mit.edu |
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| Lists: | pgsql-hackers |
On Thu, Jun 02, 2011 at 01:01:05PM -0500, Kevin Grittner wrote:
> If we're going to put this into the README-SSI as the proof of the
> validity of this optimization, I'd like to have a footnote pointing
> to a paper describing the "first commit in the cycle" aspect of a
> dangerous structure. Got any favorites, or should I fall back on a
> google search?
Hmm. I don't see any that state that in so many words, but it's an
obvious consequence of the proof of Theorem 2.1 in "Making Snapshot
Isolation Serializable" -- note that T3 is chosen to be the transaction
in the cycle with the earliest commit time.
Dan
--
Dan R. K. Ports MIT CSAIL http://drkp.net/
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