Lost databases

#1

Hi !

I'm in the ultimate state of dispair. Over the night some of my
databases just disapeared. But they did not dissaper totally. I can
still connect to them but I cannot dump them. When doing a "select *
from pg_database" I see only 2 databases I hardly ever use (they are
used once in a couple of mounths). Template0 and template1 are missing.
All the databases that I currently use dissapeared!

Please help me to restore the integrity of the system. I'm in dense fog
here

Liviu

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#2

Let's start with the version of postgresql you're using.
Next, were you running VACUUM FULL regularly?

It sounds like XID wraparound to me, no idea how to solve that. Got
backups?

On Wed, Nov 10, 2004 at 12:56:33PM +0200, Liviu BURCUSEL wrote:

Quote:

Hi !

I'm in the ultimate state of dispair. Over the night some of my
databases just disapeared. But they did not dissaper totally. I can
still connect to them but I cannot dump them. When doing a "select *
from pg_database" I see only 2 databases I hardly ever use (they are
used once in a couple of mounths). Template0 and template1 are missing.
All the databases that I currently use dissapeared!

Please help me to restore the integrity of the system. I'm in dense fog
here

Liviu

---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?

http://www.postgresql.org/docs/faqs/FAQ.html

--
Martijn van Oosterhout <kleptog (AT) svana (DOT) org> http://svana.org/kleptog/

Quote:

Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
tool for doing 5% of the work and then sitting around waiting for someone
else to do the other 95% so you can sue them.

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#3

On Wed, 10 Nov 2004 08:11:01 -0800 (PST)
Jeff Eckermann <jeff_eckermann (AT) yahoo (DOT) com> wrote:

Quote:

--- Liviu BURCUSEL <liviu (AT) voxline (DOT) ro> wrote:

Hi !

I'm in the ultimate state of dispair. Over the night
some of my
databases just disapeared. But they did not dissaper
totally. I can
still connect to them but I cannot dump them. When
doing a "select *
from pg_database" I see only 2 databases I hardly
ever use (they are
used once in a couple of mounths). Template0 and
template1 are missing.
All the databases that I currently use dissapeared!

Please help me to restore the integrity of the
system. I'm in dense fog
here

What Postgresql version is this? Your problem sounds
like "oid wraparound". There was a recent discussion
of this on the list; try the list archives to see what
was recommended in that case.

The Postgresql version is 7.4.1

Thanks. I'll look in the archive.

Liviu

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#4

Martijn van Oosterhout wrote:

Quote:

Let's start with the version of postgresql you're using.
Next, were you running VACUUM FULL regularly?

It sounds like XID wraparound to me, no idea how to solve that. Got
backups?

On Wed, Nov 10, 2004 at 12:56:33PM +0200, Liviu BURCUSEL wrote:

Hi !

I'm in the ultimate state of dispair. Over the night some of my
databases just disapeared. But they did not dissaper totally. I can
still connect to them but I cannot dump them. When doing a "select *
from pg_database" I see only 2 databases I hardly ever use (they are
used once in a couple of mounths). Template0 and template1 are missing.
All the databases that I currently use dissapeared!

Please help me to restore the integrity of the system. I'm in dense fog
here

Liviu

---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?

http://www.postgresql.org/docs/faqs/FAQ.html

Only VACUUM FULL solves XID wraparound problem? I mean VACUUM FULL locks

the entire table.

How can I test if I am close to XID wraparround?

Kostis

#5

Look at the documentation here:

http://www.postgresql.org/docs/7.4/i...intenance.html

The upshot is that you should vacuum every table in the database at
least once every billion transaction. It doesn't have to be a VACUUM
FULL, just run VACUUM without specifying a table.

There's some info in there about how to work out when it is necessary.

Hope this helps,

On Tue, Nov 16, 2004 at 12:22:46PM +0200, Kostis Mentzelos wrote:

Quote:

Only VACUUM FULL solves XID wraparound problem? I mean VACUUM FULL locks
the entire table.

How can I test if I am close to XID wraparround?

Kostis

---------------------------(end of broadcast)---------------------------
TIP 5: Have you checked our extensive FAQ?

http://www.postgresql.org/docs/faqs/FAQ.html

--
Martijn van Oosterhout <kleptog (AT) svana (DOT) org> http://svana.org/kleptog/

Quote:

Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
tool for doing 5% of the work and then sitting around waiting for someone
else to do the other 95% so you can sue them.

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Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

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qYE/OHWhBF3Jvy1uRoRQ0YY=
=ibwG
-----END PGP SIGNATURE-----

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Lost databases

comp.databases.postgresql.general comp.databases.postgresql.general

Lost databases - 11-10-2004 , 04:56 AM

Re: Lost databases - 11-10-2004 , 05:38 AM

Re: Lost databases - 11-11-2004 , 01:43 AM

Re: Lost databases - 11-16-2004 , 04:22 AM

Re: Lost databases - 11-17-2004 , 05:29 AM