You gave much too little information. Please see http://wiki.postgresql.org/wiki/Guide_to_reporting_problems
Especially:
- server version, platform
- vacuum-related settings
It *might* be OID wraparaound.
2011/10/10 Harshitha S <hershetha@xxxxxxxxx>
Hi,We are the following msg in the postgres logs."could not create file "base/16384/11500": File exists"Some links indicate that the issue is related to OIDs.Please help me in understanding why the message is appearing and how the issue can be resolved.Regards,Harshitha