Post: realtime without a websocket service (Neon Functions #5)#1436
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bobbyonmagic wants to merge 1 commit into
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Post: realtime without a websocket service (Neon Functions #5)#1436bobbyonmagic wants to merge 1 commit into
bobbyonmagic wants to merge 1 commit into
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Deploying devops-daily with
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Fifth and final Functions-series post. Shows realtime fan-out with Postgres LISTEN/NOTIFY + SSE on a Neon Function, no separate websocket service. Covers the subtle serverless part (per-isolate client sets fanned via NOTIFY), the unpooled-connection gotcha for LISTEN, and the honest limits (not a durable queue, 8KB payload cap, one-way).
Tested live: deployed the realtime counter, connected two independent SSE subscribers, fired three increments, and both received every value (0,1,2,3) from the single NOTIFY. Companion repo: github.com/The-DevOps-Daily/neon-realtime-demo (function + web client, authored as bobbyonmagic).
Interactive blocks: code snippets for the LISTEN/NOTIFY/SSE core, an animated terminal of the two-subscriber run, a websocket-vs-LISTEN/NOTIFY table, a warning callout on the pooler gotcha, and a github card. OG generated, validated.