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Re: [GENERAL] PANIC: heap_update_redo: no block

From: "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Simon Riggs <simon(at)2ndquadrant(dot)com>, Greg Stark <gsstark(at)mit(dot)edu>,Alex bahdushka <bahdushka(at)gmail(dot)com>,Qingqing Zhou <zhouqq(at)cs(dot)toronto(dot)edu>,Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>,pgsql-hackers(at)postgresql(dot)org
Subject: Re: [GENERAL] PANIC: heap_update_redo: no block
Date: 2006-03-28 16:12:09
Message-ID: (view raw or whole thread)
Lists: pgsql-generalpgsql-hackers
On Tue, Mar 28, 2006 at 10:07:35AM -0500, Tom Lane wrote:
> Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> > On Mon, 2006-03-27 at 22:03 -0500, Tom Lane wrote:
> >> The subsequent replay of the deletion or truncation
> >> will get rid of any unwanted data again.
> > Trouble is, it is not a watertight assumption that there *will be* a
> > subsequent truncation, even if it is a strong one.
> Well, in fact we'll have correctly recreated the page, so I'm not
> thinking that it's necessary or desirable to check this.  What's the
> point?  "PANIC: we think your filesystem screwed up.  We don't know
> exactly how or why, and we successfully rebuilt all our data, but
> we're gonna refuse to start up anyway."  Doesn't seem like robust
> behavior to me.  If you check the archives you'll find that we've
> backed off panic-for-panic's-sake behaviors in replay several times
> before, after concluding they made the system less robust rather than
> more so.  This just seems like another one of the same.

Would the suggestion made in help
in this regard? (Sorry, much of this is over my head, but not everyone
may have read that...)
Jim C. Nasby, Sr. Engineering Consultant      jnasby(at)pervasive(dot)com
Pervasive Software    work: 512-231-6117
vcard:       cell: 512-569-9461

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