Someone at OSCON just asked if there is a way to find the _time_ delay
between received and applied WAL. Right now
pg_last_xlog_replay_location() only reports the information in WAL
scale. It would be nice to report that in time, e.g. milliseconds.
Because an idle master will not generate WAL, I don't think there is a
way to report the time delay in receiving WAL.
-- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB
http://enterprisedb.com
+ None of us is going to be here forever. +