Hi, I am using a master and a replica with PostgreSQL 9.1.3. I would like to measure the replication lag between my servers (in time units).
On the replica I can use the function pg_last_xact_replay_timestamp(). But on the master I only can use pg_current_xlog_location() which does not return a timestamp. I do not know any function returning the timestamp.
Is there any way to get the timestamp relative to the result of pg_current_xlog_location() ?
