PostgreSQL server process -> client process mapping

How can I find whic开发者_StackOverflowh client process is connected to a server process?

SELECT *
FROM pg_stat_activity

More details in the manual:

http://www.postgresql.org/docs/9.0/static/monitoring-stats.html#MONITORING-STATS-VIEWS

http://www.postgresql.org/docs/9.0/static/monitoring.html