I am unable to run pg_dump because even though I can successfully start the
postmaster, every time I try to do something I receive the warning that the
postmaster will not allow any activity because we crossed the minimum
transaction threshold. pg_dump dies almost immediately:
Starting dump to
/vsa/backups/db/20080125170401.vsa_pgsql_db_bak.gz...pg_dump: [archiver
(db)] connection to database "vsa" failed: FATAL: database is not
accepting commands to avoid wraparound data loss in database "vsa"
HINT: Stop the postmaster and use a standalone backend to vacuum database
"vsa".
The backup completed with the condition coded = 0
Any other suggestions?
___________________________________________________________________________________
Steven Rosenstein
IT Architect/Developer | IBM Virtual Server Administration
Voice/FAX: 845-689-2064 | Cell: 646-345-6978 | Tieline: 930-6001
Text Messaging: 6463456978 @ mobile.mycingular.com
Email: srosenst @ us.ibm.com
"Learn from the mistakes of others because you can't live long enough to
make them all yourself." -- Eleanor Roosevelt
From: Tino Schwarze <postgresql@xxxxxxx>
To: pgsql-admin@xxxxxxxxxxxxxx
Date: 01/25/2008 02:27 PM
Subject: Re: Recovering a database in danger of transaction wrap-around
On Fri, Jan 25, 2008 at 02:10:06PM -0500, Tom Lane wrote:
> > I used lsof to monitor which files the backend was actually working on.
It
> > took two of the four days for it to vacuum a single table with 43
> > one-gigabyte extents. I have one table with over 300 extents. I'm
looking
> > at a vacuum process which can ultimately take weeks (if not months) to
> > complete.
>
> Yipes. You are just using plain VACUUM, right, not VACUUM FULL?
> Have you checked that vacuum_cost_delay isn't enabled?
pg_dump/pg_restore may be a lot faster here - we're in an emergency
situation anyway and after that, the whole DB will be clean again, all
indices rebuilt nicely, no bloat in the tables.
Tino.
--
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