Re: table corrupted

On Thu, 2009-10-22 at 14:28 -0200, João Eugenio Marynowski wrote:
> Hi
>
Repair? Not likely. Get past? Maybe.

set zero_damaged_pages to on;
vacuum verbose;

I would do a hardware check too.

Joshua D. Drake

> Can someone help me how to repair the problem below, I'm using
> Postgres 8.2.5:
> - after appeared the erros below in selects, vacuum and dump in one
> table:
> 2009-10-16 16:07:06 BRT 192.168.0.87 ERROR:  could not access status
> of transaction 29024764
> 2009-10-16 16:07:06 BRT 192.168.0.87 DETAIL:  Could not open file
> "pg_clog/001B": No such file or directory.
> 2009-10-16 16:07:06 BRT 192.168.0.87 STATEMENT:  select ...
> 2009-10-16 16:11:47 BRT 192.168.0.29 ERROR:  invalid page header in
> block 462821 of relation "..."
> 2009-10-16 16:11:47 BRT 192.168.0.29 STATEMENT:  select ....
> I created the file pg_clog/001B with 256kB of /dev/zero
> That resolve the problem with vacuum but began other error in selects
> and dump to the same table ended all connections and stay up after
> showing the error:
> 2009-10-19 13:50:03 BRT  LOG:  server process (PID 1544) was
> terminated by signal 11
> 2009-10-19 13:50:03 BRT  LOG:  terminating any other active server
> processes
> 2009-10-19 13:50:03 BRT 192.168.0.253 WARNING:  terminating connection
> because of crash of another server process
> 2009-10-19 13:50:03 BRT 192.168.0.253 DETAIL:  The postmaster has
> commanded this server process to roll back the current transaction and
> exit, because another server process exited abnormally and possibly
> corrupted shared memory.
> 2009-10-19 13:50:03 BRT 192.168.0.253 HINT:  In a moment you should be
> able to reconnect to the database and repeat your command.
> Was habilited the zero_damage_pages option then executed selects,
> vacuums, and dumps but not changed...
> Was identified 2 register that if refered cause error.
> The BD was restored in backup server with 8.2.7 and executed vacuums
> ok but select and reindex crashed...
>
> Instaled 8.3.8 version and used pg_dump but error
> And then the select below show the problem where the codentrega from
> where clause differ from select answer:
>
> LOGIST=# select codentrega from entregas where codentrega='9879622';
>  codentrega
> ------------
>  z879622
> (1 registro)
>
> Any idea?

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