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by gunnarmorling 2336 days ago
Debezium uses neither triggers nor NOTIFY. For Postgres, it uses one of several supported logical decoding plug-ins (pgoutput, decoderbufs, wal2json), which doesn't have any size limit and also allow to capture changes occuring while it isn't running by catching up with changes from the WAL from the point where it left off before.

Disclaimer: Debezium lead here