On Fri, Jul 20, 2012 at 1:02 AM, David Kerr <dmk@xxxxxxxxxxxxxx> wrote:
> I was looking into this last month and some nice folks on the list pointed me to this formula
> for calculating lag. (to be run on the slave) similar to what Sergey said.
>
> 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;
If you have a connection problem this will not reflect the situation.
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Sergey Konoplev
a database architect, software developer at PostgreSQL-Consulting.com
http://www.postgresql-consulting.com
Jabber: gray.ru@xxxxxxxxx Skype: gray-hemp Phone: +79160686204
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