Log Message:
The PostgreSQL Global Development Group has released a critical update to all \ 
supported versions of the PostgreSQL database system, which includes minor \ 
versions 9.3.2, 9.2.6, 9.1.11, 9.0.15, and 8.4.19. This update fixes three \ 
serious data-loss bugs affecting replication and database maintenance. All users \ 
are urged to update their installations at the earliest opportunity.

The replication issue affects some users of PostgreSQL binary replication, and \ 
can cause minor data loss between the master and the standby. While not all \ 
users are affected, it is difficult to predict when the bug will occur, so we \ 
urge all users of replication and continuous backup (PITR) to update \ 
immediately. Additionally, users who had replication running under PostgreSQL \ 
minor versions 9.3.0, 9.3.1, 9.2.5, 9.1.10, or 9.0.14 should plan to take a \ 
fresh base backup of each standby after update, in order to ensure no prior data \ 
corruption already exists.

This release also fixes two timing issues with VACUUM, which can cause old, \ 
overwritten or deleted rows to re-appear at a later date under some \ 
circumstances. Users with very high transaction rates, particularly those who \ 
experience "transaction ID wraparound" every few weeks or less, are \ 
the most at risk for this issue. Those users should set vacuum_freeze_table_age \ 
to 0, and run a database-wide VACUUM after the update. The second of the two \ 
VACUUM issues affects only 9.3, making it expecially important for 9.3 users to \ 
update.