pg_Stat_Subscription does not anwer what I want. This view just show if
replication is being processed but not exactly what it´s doing.
Is it replicating a huge table which an erroneous proess updated several
times ?
Replication process is recreating what index and that is spending how much
time ?
What WAL, table, operation is the one being processed ?
So I would like to have a listener on replica server just to see all WAL
info is coming, just that.
Then I can go back to production and see what´s could run better, if
application, triggers and so on.
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