use this query:
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())::INTEGER
END
AS replication_lag;
found at
http://www.postgresql.org/message-id/cadkbjjwz9m0swpt3oqe8f9+tfd4-f54ue6xtkh4nerpv
On Mon, Jun 15, 2015 at 9:04 AM, Anton Bushmelev wrote:
> Hello, thank t for response, measure in bytes may bemore correct, but to
> bring it to the customer? :) I think it is easier to say that the standby
> database lags behind master no more than 15 minutes, than the fact that it
> differs for
Hello, thank t for response, measure in bytes may bemore correct, but to
bring it to the customer? :) I think it is easier to say that the
standby database lags behind master no more than 15 minutes, than the
fact that it differs for 1 megabyte.
ps: sorry for my English
On 06/15/2015 02:57 AM,
On Mon, Jun 15, 2015 at 8:30 AM, Anton Bushmelev wrote:
> Hello, dear guru =) help me to fix situation when no change made on primary
> and standby show lag more than 15 minutes:
> master :
> postgres=# select * from pg_stat_replication
> ;
> -[ RECORD 1 ]+--
> pid
