Here is a snapshot of installed postgresql packages:
mayank@server:~$ dpkg -l | grep postgres

ii 
postgresql-9.1                     
9.1.5-1~bpo60+1             
object-relational SQL database, version 9.1 server

ii 
postgresql-client-9.1              
9.1.5-1~bpo60+1             
front-end programs for PostgreSQL 9.1

ii 
postgresql-client-common           
130~bpo60+1                 
manager for multiple PostgreSQL client versions

ii  postgresql-common                  
130~bpo60+1                 
PostgreSQL database-cluster manager

ii 
postgresql-contrib                 
9.1+130~bpo60+2             
additional facilities for PostgreSQL (supported
version)

ii 
postgresql-contrib-9.1             
9.1.5-1~bpo60+1             
additional facilities for PostgreSQL
Regards,
Mayank Mittal


> Date: Thu, 20 Sep 2012 16:15:11 +0000
> Subject: [BUGS] BUG #7562: could not read block 0 in file "base/16385/16585": 
> read    only 0 of 8192 bytes
> To: pgsql-bugs@postgresql.org
> From: mayank.mittal.1...@hotmail.com
> 
> The following bug has been logged on the website:
> 
> Bug reference:      7562
> Logged by:          Mayank Mittal
> Email address:      mayank.mittal.1...@hotmail.com
> PostgreSQL version: 9.1.5
> Operating system:   Debian Linux 6.0
> Description:        
> 
> We are using 2 node set-up of PostgreSQL 9.1.5 in which one is master and
> other is slave which is in sync of master with streaming replication. 
> The design is in such a way that in case of master node failure the slave
> node has to take master role. I'm controlling this behaviour using Corosync
> and Heartbeat.
> My application is requirement needs heavy database updates. Upon fail-over
> I've noticed that database indexes got corrupted. 
> I'm not sure why this is happening. I was referring release notes of 9.1.3
> and found similar issue is already fixed in it, but we are facing the same.
> 
> 
> 
> 
> 
> -- 
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