Ask questionsNaN value for pg_stat_replication_pg_xlog_location_diff
No data for pg_stat_replication_* except pg_stat_replication_pg_xlog_location_diff - NaN Postgres 9.6, replication is working.
Answer questions snarlistic
@jamesbot9000 Please see merge request https://github.com/wrouesnel/postgres_exporter/pull/253. I'm pretty sure this will help you understand what the exact resolution here is. It took me quite some time and learning to figure it out myself. So hopefully this wil help others too.