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From: Siddharth Shah <siddharth.shah@elitecore.com>
To: pgsql-admin@postgresql.org
To: pgsql-novice@postgresql.org
Subject: ERROR:  XX001 (Critical and Urgent)
Date: Fri, 07 May 2010 13:33:08 +0530
Message-ID: <4BE3C93C.70800@elitecore.com> (raw)

Hello All,
   
    Getting *ERROR:  XX001: could not read block 17 of relation 
base/16386/2619: read only 0 of 8192 bytes*, While vacuuming database
    Manual vacuuming and Auto vacuuming process *constantly* taking high 
CPU, not able to skip corrupted table for vacuuming and dump this 
message at regular interval. * fsync is off* , From strace, found that 
semop call was in infinite loop.
     
    I have tried with making fsync on, Now manual vacuum process is 
taking high CPU, Strace unable to show any results (may be dead lock 
situation)
    and not any error / warning from postgres daemon

    Postgres Version : 8.4.3 (Migrated data from 8.4.1)

What can be issue ? Is it issue coming after database  table corruption, 
Can fsync on can prevent such (corruption) scenarios ?

Thanks,
Siddharth

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