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RE: postgres crash. HELP

From: "Oscar Serrano" <oserra(at)fondos(dot)net>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: <pgsql-interfaces(at)postgresql(dot)org>
Subject: RE: postgres crash. HELP
Date: 2000-05-08 09:11:54
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-interfaces

> -----Mensaje original-----
> De: pgsql-interfaces-owner(at)hub(dot)org
> [mailto:pgsql-interfaces-owner(at)hub(dot)org]En nombre de Tom Lane
> Enviado el: domingo, 07 de mayo de 2000 18:18
> Para: Oscar Serrano
> CC: pgsql-interfaces(at)postgresql(dot)org
> Asunto: Re: [INTERFACES] postgres crash. HELP
> "Oscar Serrano" <oserra(at)fondos(dot)net> writes:
> > Suddenly in the directory where I have all the tables, now
> there is about
> > 1000 files with names like this:
> > [ and a bunch of apparently-duplicated entries in system catalogs ]
> Looks pretty messy :-(.  What version are you running?
> I hope you have a fairly recent pg_dumpall backup, because otherwise
> you are likely to be in trouble.  If the backup is new enough that you
> can just restore from it without losing much, then I'd recommend just
> initdb and restore.  If you have newer data than what is in the backup,
> but the schema is still the same, you could probably use pg_upgrade to
> recover the system tables from the backup and then move your current
> user data into the database.  (It looks like the trouble is just in the
> system tables, so your user tables are most likely OK.)

I had a backup fortunately. I first had to make some pg_dump of some tables
that were not corrupted and restore them later.
I have postgres 6.5.3.
I didn't know about pg_upgrade. I will have to read about it.
Actually I have my dabatases open to every IP address, so anybody that
enters our web page, and visits some of our applets, the connect via JDBC to
our database. I think that during one of this connection, the postgres
crashed. I'm going to stop using JDBC.
Is there any known problem with the ODBC of the postgres?

> If you want to try the pg_upgrade method, make sure you have the latest
> pg_upgrade script (from 7.0RC5, current nightly snapshot, or direct from
> CVS server) --- previous versions are known to have problems in
> multi-user databases.  Then, follow the man page's directions for
> pg_upgrade, except don't bother trying to make a "pg_dumpall -s" dump
> from your corrupted database; instead use your last good backup file
> as the input script for pg_upgrade.
> 			regards, tom lane

The problem was that I could not access the corrupted database for nothing.
Neither could I do a SELECT nor a pg_dump. The fields of the index were also
duplicated and that was generating more errors. I really think the data was
there but the system databases where corrupted.
Our schema don't change everyday so I'm going to do a backup of the system
tables every day.

Thank you very much.

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