Обсуждение: debug issue on postgresql

Hi All,

I’m writing you to get some information regarding the possibility to get some information a db corruption got yesterday morning in a live platform .

We realized DB Inconsistence and corruption and we tried to restore immediately the DB , via a back-up procedure, to restore services for customer.

Now we need to investigate on DB what it was the route cause for db corruption.

Unfortunately we don’t have any experience with postgres db because the platform had improved by a colleague that left company and no one got the opportunity to learn something …..

Some documentation to start with postgres will be appreciate .

Best Regards

Alessandro.

Guillaume,

Well I could shortly describe what's happen on these machines ;

On May 7 2008 at 23:25 an operator performed :

_a configuration change ;

_add a new user on a table named MVNO;

Customer told us that for  “new user” operator add comma “,” symbol.

This is something new for their provisioning procedure (it’s seems they never test it )thus as soon as they propagate this updated DB over machines of live net these started to discard all the requests and no more user was able to work or work properly .

Now they asking us what’s happen so this is the reason why I’m writing here .

Unfortunately I tried to verify the backup db but the one interesting for us is empty :

ls -l  200805*

-rw-r--r--    1 root     root       842840 mag  1 04:03 20080501-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root       842840 mag  2 04:03 20080502-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root       842840 mag  3 04:03 20080503-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root       842840 mag  4 04:03 20080504-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root       842540 mag  5 04:03 20080505-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root       842613 mag  6 04:03 20080506-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root       842613 mag  7 04:03 20080507-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root            0 mag  8 04:03 20080508-0403-cfg_xxxxxxx.sql

-rw-r--r--    1 root     root       843960 mag  9 04:03 20080509-0403-cfg_xxxxxxx.sql

I‘ll try to find it but but even if I can’t provide this back-up for company policies reason , could I ask you some feed-back to get suggestion to look for on this back-up file?

Many thanx anyway for your help

Best Regards

Alessandro.

-----Original Message-----
From: Guillaume Lelarge [mailto:guillaume@lelarge.info]
Sent: venerdì 9 maggio 2008 19:05
To: MARIOTTI, Alessandro (Alessandro)
Cc: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] debug issue on postgresql

MARIOTTI, Alessandro (Alessandro) a écrit :

> I’m writing you to get some information regarding the possibility to get

> some information a db corruption got yesterday morning in a live platform .

>

> We realized DB Inconsistence and corruption and we tried to restore

> immediately the DB , via a back-up procedure, to restore services for

> customer.

>

> Now we need to investigate on DB what it was the route cause for db

> corruption.

>

Do you have a backup of the corrupted database ? If you don't, it will

be extremely hard to tell you anything interesting.

And you need to tell us what kind of issue you have, which release you

use, etc.

> Unfortunately we don’t have any experience with postgres db because the

> platform had improved by a colleague that left company and no one got

> the opportunity to learn something …..

>

> Some documentation to start with postgres will be appreciate .

>

http://www.postgresql.org/docs/ and then choose the manual related to

your PostgreSQL release.

Regards.

--

Guillaume.

  http://www.postgresqlfr.org

  http://dalibo.com