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PostgreSQL LISTEN/NOTIFY Queue Full: A 512 KiB Reproduction

This story is from 2026-09-19. It is preserved in the archive; the latest stories are on the live feed.

What causes PostgreSQL to report: ERROR: too many notifications in the NOTIFY queue I reproduced it with PostgreSQL 17, Docker, and two psql sessions. Instead of trying to fill PostgreSQL's default multi-gigabyte queue, I started the server with: max_notify_queue_pages=64 With 8 KiB pages, that gav…

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  1. 2026-09-19 01:46 · DEV Community — AI
    PostgreSQL LISTEN/NOTIFY Queue Full: A 512 KiB Reproduction

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