On 28th of January, Fujii Masao committed patch: Add pg_stat_archiver statistics view. This view shows the statistics about the WAL archiver process's activity. Gabriele Bartolini, reviewed by Michael Paquier, refactored a bit by me.
On 4th of April, Tom Lane committed patch: Add \watch [SEC] command to psql. This allows convenient re-execution of commands. Will Leinweber, reviewed by Peter Eisentraut, Daniel Farina, and Tom Lane
On 28th of November Tom Lane committed patch by Dave Page, which adds new capability to system monitoring and logging: Log Message: ----------- Add support for an application_name parameter, which is displayed in pg_stat_activity and recorded in log entries. Dave Page, reviewed by Andres Freund