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Postgres LISTEN/NOTIFY does not scale

Deep DiveUpdated at: July 10, 2025 TL;DRHow we discovered itReproducing the problemWith NOTIFYWithout NOTIFYRemediation At Recall.ai, we run an unusual workload. We record millions of hours of meetings every month. Each of these meetings generates a large amount of data we need to reliably capture and analyze. Some of that data is video, some of it is audio and some of it is structured data – transcription, events and metadata. The structured data gets written to our Postgres database by tens of...

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