Space Problems

Hi, I has a problem with a production database Postgres 7.1.2.

Happens when finished free space disk.

Some important tables were empty with no reason.

I tried to find respectives files for tables with psql command :

 

select relfilenode from pg_class
where relname = '<table>';

 

 relfilenode
-------------
       19597
(1 row)

Then I found this file into /home2/postgres/data/base/18720 directory
$ ls -lh 19597
-rw-------    1 postgres postgres        0 Oct 30  2001 19597

 

First, it's look like empty. Second, the file date was too old for the database.

But, looking into this directory, I found some files with date and size compatibles with my old database (when works !)

 

$ ls -lh 1*
-rw-------    1 postgres postgres   182.0M Mar 11 16:23 108464
-rw-------    1 postgres postgres   204.0M Mar 11 16:23 108487
-rw-------    1 postgres postgres    94.8M Mar 11 16:23 108490
-rw-------    1 postgres postgres   268.6M Mar 11 16:23 118920
-rw-------    1 postgres postgres   206.1M Mar 11 16:23 118953

 

Then, I tried to find them into pg_class table, with pgsql :

 

# select * from pg_class where relfilenode in (108464,108487,108490,118920,118953);

 relname | reltype | relowner | relam | relfilenode | relpages | reltuples | reltoastrelid | reltoastidxid | relhasindex | relisshared | relkind | relnatts | relchecks | reltriggers | relukeys | relfkeys | relrefs | relhaspkey | relhasrules | relhassubclass | relacl
---------+---------+----------+-------+-------------+----------+-----------+---------------+---------------+-------------+-------------+---------+----------+-----------+-------------+----------+----------+---------+------------+-------------+----------------+--------
(0 rows)

 

The point is : I think some system table was corrupted. The files are still in the directory, but it seems they are not referenced in the database system ( couldn't find any relationship between pg_class table and them)

Have any way to restore them ??

 

I already restarted the database and executed vacuum command but didn't work.

 

Could someone help me ?

 

Tks