BOboxcarr·Feb 14, 2019
This is super helpful. Agreed with other comments about making this available more readily on the DO Managed DB pages.
Having looked through the set of extensions, wal2json (https://github.com/eulerto/wal2json). That makes sense since there's no way at the moment to get access to replication.
However, the use case for wal2json in addition to the access to replication is that it's the best way that I know of to get reliable change notifications from the database. I personally use this to pipe the JSON blobs into message queues to be consumed by applications.
As a short aside, I don't use PostgreSQL's NOTIFY/LISTEN because, as I understand it, you will not receive messages if there are no connections to the DB -- this is a show stopper for me.
AWS RDS allows this and Google's PostgreSQL does not. I've personally abandoned Google's version f
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irst partly because it seems to have stalled in terms of upgrades, and AWS for being way too expensive for what you get. Although it doesn't work for me at the moment, I'm hoping the DO option will work for me in this regard in the not so distant future.