We have been using the current version of postgres i.e. 9.1.4 with streaming replication on. While vacuuming we noticed that certain dead rows are not getting removed and following debug information is printed:
"DETAIL: 12560 dead row versions cannot be removed yet."
As per suggestion, we made sure that no long running transactions are active. Also all the applications were stopped during this time.
Can anybody highlight the possible reason for the dead rows not been cleaned?
FYI: We used the command VACUUM FULL ANALYZE VERBOSE table_name; command.
Regards,
Nimesh.
