Postgres base Backup fails to recover all logs fails from archive

From: Lars Aksel Opsahl <lop(at)skogoglandskap(dot)no>
To: "pgsql-admin(at)postgresql(dot)org" <pgsql-admin(at)postgresql(dot)org>
Subject: Postgres base Backup fails to recover all logs fails from archive
Date: 2013-01-05 21:30:17
Message-ID: D2E91A2C028BD847A828EFBDAA0C9EF2AB526C2D@exdb1.ad.skogoglandskap.no
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Hi

This is postgreSQL 9.2.1

By accident I was running the the following command

«delete from org_oks.oks_kartobjekt_flate where id = 53»

on the wrong database.

- I first picked up last basebackup from the backup server. The base backup was from 22/11 and It was made made by using «24.3.3. Making a Base Backup Using the Low Level API» with SELECT pg_start_backup('label'); and then a file system backup and then SELECT pg_stop_backup();

The row I deleted was added after the base backup was created.

- Her is the cat from 0000000100000023000000F4.00000020.backup

START WAL LOCATION: 23/F4000020 (file 0000000100000023000000F4)

STOP WAL LOCATION: 23/F47303F0 (file 0000000100000023000000F4)

CHECKPOINT LOCATION: 23/F4000020

BACKUP METHOD: pg_start_backup

BACKUP FROM: master

START TIME: 2012-11-22 09:57:03 CET

LABEL: /backup/db01/base_backup_2012_11_22

STOP TIME: 2012-11-22 10:38:44 CET

- I create the recovery.conf with the following content (I have also tested without recovery_target_time but it's the same behavior)

restore_command ='cp /data01/new_archive_files/%f %p'

recovery_target_time = '2013-01-04 04:00:00'

- Here is the log from startup

LOG: database system was interrupted; last known up at 2012-11-22 10:22:36 CET

LOG: starting archive recovery

LOG: restored log file "0000000100000023000000F4" from archive

LOG: redo starts at 23/F4000080

LOG: consistent recovery state reached at 23/F5000000

LOG: restored log file "0000000100000023000000F5" from archive

LOG: restored log file "0000000100000023000000F6" from archive

LOG: restored log file "0000000100000023000000F7" from archive

LOG: contrecord is requested by 23/F7000020

LOG: redo done at 23/F6000080

LOG: restored log file "0000000100000023000000F6" from archive

cp: cannot stat `/data01/new_archive_files/00000002.history': No such file or directory

LOG: selected new timeline ID: 2

cp: cannot stat `/data01/new_archive_files/00000001.history': No such file or directory

LOG: archive recovery complete

LOG: database system is ready to accept connections

LOG: autovacuum launcher started

- Here is the list some the archive files.

-rwx------ 1 postgres postgres 16777216 Nov 24 07:11 000000010000002400000008

-rwx------ 1 postgres postgres 16777216 Nov 24 07:10 000000010000002400000007

-rwx------ 1 postgres postgres 16777216 Nov 24 07:00 000000010000002400000006

-rwx------ 1 postgres postgres 16777216 Nov 24 06:50 000000010000002400000005

-rwx------ 1 postgres postgres 16777216 Nov 24 06:45 000000010000002400000004

-rwx------ 1 postgres postgres 16777216 Nov 24 06:40 000000010000002400000003

-rwx------ 1 postgres postgres 16777216 Nov 24 06:32 000000010000002400000002

-rwx------ 1 postgres postgres 16777216 Nov 24 06:26 000000010000002400000001

-rwx------ 1 postgres postgres 16777216 Nov 24 06:16 000000010000002400000000

-rwx------ 1 postgres postgres 16777216 Nov 24 06:08 0000000100000023000000FE

-rwx------ 1 postgres postgres 16777216 Nov 24 06:02 0000000100000023000000FD

-rwx------ 1 postgres postgres 16777216 Nov 24 05:57 0000000100000023000000FC

-rwx------ 1 postgres postgres 16777216 Nov 24 05:39 0000000100000023000000FB

-rwx------ 1 postgres postgres 16777216 Nov 24 05:32 0000000100000023000000FA

-rwx------ 1 postgres postgres 16777216 Nov 24 05:31 0000000100000023000000F9

-rwx------ 1 postgres postgres 16777216 Nov 24 05:31 0000000100000023000000F8

-rwx------ 1 postgres postgres 16777216 Nov 24 05:27 0000000100000023000000F7

-rwx------ 1 postgres postgres 16777216 Nov 22 12:37 0000000100000023000000F6

-rwx------ 1 postgres postgres 16777216 Nov 22 12:37 0000000100000023000000F5

-rwx------ 1 postgres postgres 16777216 Nov 22 10:38 0000000100000023000000F4

-rwx------ 1 postgres postgres 325 Nov 22 10:38 0000000100000023000000F4.00000020.backup

I have two questions

1. Can anybody see what the problem is here and what I am doing wrong ? (I have done this many times before without any problems.)

2. Is it possible to extract sql insert's from the archive files abouve and in that way find the content of the row I deleted ? (The table name oks_kartobjekt_flate only occurs in about 10 archive files)

Thanks in advance

Lars

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