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chore(mosquitto): queue up to 10,000 messages per client - #147
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Why
A subscribing client is sent every retained message under its filter at once, and mosquitto silently drops whatever does not fit its outgoing queue: 1,000 messages by default. Large sites retain far more than that, so a client subscribing widely got only part of the state. That includes stagehand's hot list (one
connectedper module) and source clearing or sweeping retained state.Change
max_queued_messages 10000. A client that needs more than that can subscribe more narrowly, or refresh.At 3,000 systems and 15,000 modules (about 168,000 retained topics), the queue also limits what a single subscription can see. Source's startup sweep, which reads the broker while busy, found 2,090 of about 27,500 stale topics at 10,000 (385 at the default). PlaceOS/source#67 adds a clear and resync that works in rounds, so it's complete regardless of this limit.
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