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From: Bruce Momjian on 20 Jul 2010 15:13
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(a)momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ None of us is going to be here forever. +

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