On 07/22/2012 02:00 PM, leo xu wrote:
hello everyone:
               my pg version is 9.1.2 running on red hat 5.4 x64 servers.one
day,i found all database indexes can't work,reindex database,it can work,but
some table has primary key,found exists the same two records in table.

When did this start happening? At random? After a server crash or power loss? After an administrative action?

Are you running with fsync=off or using storage that has write caching enabled?

--
Craig Ringer

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