Yes it's purely for monitoring purpose.
Regards, Granthana On Fri, Jan 17, 2014 at 3:29 PM, Sameer Kumar <sameer.ku...@ashnik.com>wrote: > > > On Fri, Jan 17, 2014 at 5:31 PM, Granthana Biswas <granth...@zedo.com>wrote: > >> >> >> Thank you Sameer for your reply. Is there any other query that would help >> get exact replication lag? >> >> > You 2nd Query is the most accurate you can get. > > >> 2. SELECT CASE WHEN pg_last_xlog_receive_location() = >>>> pg_last_xlog_replay_location() THEN 0 ELSE EXTRACT (EPOCH FROM now() - >>>> pg_last_xact_replay_timestamp()) END AS log_delay; >>> >>> For reason same as above, this won't be exact but the most accurate you >>> can get. >>> >>> You can get lags in terms of bytes (and I have always believed that > makes more sense). > > > May I ask, why are you looking for this info? Is it purely monitoring? > > Regards > Sameer > Ashnik Pte Ltd. > >
