Re: Investigate postgres 9.6.3 repmgr lag 4.0.4

Mariel Cherkassky <mariel(dot)cherkassky(at)gmail(dot)com> writes:

> Hi all,
> it happened again. The weird thing is that when I query
> pg_stat_replication I see only one slave(the one that is still
> synced) and I dont see the second one. Moreover,  I dont see anything
> in the repmgr log of the primary and in the slave regarding the
> disconnection...

Disclaimer: I am not a repmgr admin...

I suggest you check the DB server logs on both standby node and master
for evidence of connection attempts for streaming, their success/failure
and reasons and/or what might cause an established connection to drop.

That you don't see the rogue standby in pg_stat_replication on the
master is clear evidence that it's not connected presently but this
doesn't tell the whole story.

--
Jerry Sievers
Postgres DBA/Development Consulting
e: postgres(dot)consulting(at)comcast(dot)net
p: 312.241.7800