Re: How are locks managed in PG?

From: David Fetter <david(at)fetter(dot)org>
To: "Jonah H(dot) Harris" <jonah(dot)harris(at)gmail(dot)com>
Cc: Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Thomas Kellerer <spam_eater(at)gmx(dot)net>, pgsql-general(at)postgresql(dot)org
Subject: Re: How are locks managed in PG?
Date: 2008-12-22 02:42:58
Message-ID: 20081222024258.GE4200@fetter.org
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On Sun, Dec 21, 2008 at 08:46:15PM -0500, Jonah H. Harris wrote:
> On Fri, Dec 19, 2008 at 7:49 AM, Alvaro Herrera
> <alvherre(at)commandprompt(dot)com> wrote:
> >> Oracle on the other hand stores the lock information directly in
> >> the data block that is locked, thus the number of locks does not
> >> affect system performance (in terms of managing them).
> >>
> >> I couldn't find any description on which strategy PG applies.
> >
> > None of the above. We're smarter than everyone else.
>
> Which is why Oracle's locks are more scalable than PG's?

You've been talking about your super-secret test which you allege,
quite implausibly, I might add, to have Oracle (8i, even!) blowing
PostgreSQL's doors off for weeks now.

Put up, or shut up.

Regards,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
Skype: davidfetter XMPP: david(dot)fetter(at)gmail(dot)com

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