DB crashed and duplicated template0 db

On 7/6/07, Luki Rustianto <lukirus@gmail.com> wrote:

Hi,

One of my customer's server goes down, I don't know yet how, but when
when they restart the machine I got this:
1. DB is working like usual
2. template0 and template1 database is *duplicated*
3. I can't do pg_dump, because error returned (see below)

How can I backup the database (other than template0 and template1) ?
How can this happen (duplicated db entry) ?

below is the log:

[korp@bum ~]$ psql -Utest -l
Password:
List of databases
Name | Owner | Encoding
--------------+----------+-----------
template0 | postgres | SQL_ASCII
template0 | postgres | SQL_ASCII
template1 | postgres | SQL_ASCII
template1 | postgres | SQL_ASCII
tmed | test | SQL_ASCII
tmed_drei | test | SQL_ASCII
(6 rows)

[korp@bum ~]$ pg_dump -x -O -Utest tmed > db.sql Password:
pg_dump: query to obtain list of schemas failed: ERROR: more than one
row returned by a subquery used as an expression

[terakorp@bumel ~]$ psql -Utest teramed -c "SELECT COUNT(*) FROM
regpatient" Password:
count
--------
135223
(1 row)

[terakorp@bumel ~]$ psql --version
psql (PostgreSQL) 7.4.8
contains support for command-line editing

thx.

This can happen when your index is/are corrupted. Try issuing a
reindex command.

regards,
--
Sibte Abbas
EnterpriseDB http://www.enterprisedb.com

"Luki Rustianto" <lukirus@gmail.com> writes:

One of my customer's server goes down, I don't know yet how, but when
when they restart the machine I got this:
1. DB is working like usual
2. template0 and template1 database is *duplicated*
3. I can't do pg_dump, because error returned (see below)

This looks a bit like transaction ID wraparound causing old dead
versions of rows to reappear as live. What's the vacuuming policy
been on this database?

See recent discussion of a similar symptom here
http://archives.postgresql.org/pgsql-admin/2007-07/msg00037.php

regards, tom lane