| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, simon(at)2ndquadrant(dot)com, kleptog(at)svana(dot)org, gsstark(at)mit(dot)edu, pg(at)rbt(dot)ca, zhouqq(at)cs(dot)toronto(dot)edu, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [Bizgres-general] WAL bypass for INSERT, UPDATE and |
| Date: | 2006-01-03 17:08:05 |
| Message-ID: | 200601031708.k03H85j27170@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
Tom Lane wrote:
> "Jim C. Nasby" <jnasby(at)pervasive(dot)com> writes:
> > On Tue, Jan 03, 2006 at 11:26:51AM -0500, Tom Lane wrote:
> >> Such an ALTER would certainly require exclusive lock on the table,
> >> so I'm not sure that I see much use-case for doing it like that.
> >> You'd want to do the ALTER and commit so as not to lock other people
> >> out of the table entirely while doing the bulk data-pushing.
>
> > Maybe this just isn't clear, but would EXCLUSIVE block writes from all
> > other sessions then?
>
> I don't think it should (which implies that EXCLUSIVE is a bad name).
Agreed, EXCLUSIVE was used to mean an _exclusive_ writer. The new words
I proposed were PRESERVE or STABLE.
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Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
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