Support cascade replication in get_stats_replication_delays #28
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When monitoring a cluster with cascade replication the current query fails with "get_stats_replication_delays". We can instead monitor the diff using pg_last_wal_receive_lsn, this will emit metrics showing how much replication delay the replica has compared to the upstream node (but not relative to the primary instance of the cluster).
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LGTM |
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@dflemstr PTAL |
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When monitoring a cluster with cascade replication the current query
fails with "get_stats_replication_delays". We can instead monitor the
diff using pg_last_wal_receive_lsn, this will emit metrics showing how
much replication delay the replica has compared to the upstream node
(but not relative to the primary instance of the cluster).