Re: ERROR during end-of-xact/FATAL

From: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Noah Misch <noah(at)leadboat(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: ERROR during end-of-xact/FATAL
Date: 2013-12-20 15:44:06
Message-ID: 20131220154406.GA22570@eldon.alvh.no-ip.org
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Robert Haas escribió:
> On Thu, Nov 28, 2013 at 10:10 AM, Alvaro Herrera
> <alvherre(at)2ndquadrant(dot)com> wrote:
> > Robert Haas escribió:
> >> On Wed, Nov 6, 2013 at 9:40 AM, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> >> > Noah Misch wrote:
> >> >> Incomplete list:
> >> >>
> >> >> - If smgrDoPendingDeletes() finds files to delete, mdunlink() and its callee
> >> >> relpathbackend() call palloc(); this is true in all supported branches. In
> >> >> 9.3, due to commit 279628a0, smgrDoPendingDeletes() itself calls palloc().
> >> >> (In fact, it does so even when the pending list is empty -- this is the only
> >> >> palloc() during a trivial transaction commit.) palloc() failure there
> >> >> yields a PANIC during commit.
> >> >
> >> > I think we should fix this routine to avoid the palloc when not necessary.
> >> > That initial palloc is pointless.
> >
> > Here's a trivial patch we could apply to 9.3 immediately. Anything else
> > such as the ideas proposed below would require more effort than anyone
> > can probably spend here soon.
>
> Yeah, this seems like a good thing to do for now.

Pushed, thanks.

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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