Hi all,
I'm just wondering what the numbers really mean. The output is "2FA/B3AFB890", for example. Do these numbers represent
somethingmeaningful I can use? Bytes, offsets within files, what? How do you monitor the difference between
write_locationand replay_location? It seems obvious the values are hex. Anybody has code they want to share?
Section 25.2.5.2 in the 9.1 docs states:
You can retrieve a list of WAL sender processes via the pg_stat_replication
(http://www.postgresql.org/docs/9.1/static/monitoring-stats.html#MONITORING-STATS-VIEWS-TABLE)view. Large differences
betweenpg_current_xlog_location and sent_location field might indicate that the master server is under heavy load,
whiledifferences between sent_location and pg_last_xlog_receive_location on the standby might indicate network delay,
orthat the standby is under heavy load.
What is a "large difference" in this context?
Thanks!
François
