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add a note on the postgres limit

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Glauco Custódio 2023-11-02 17:36:14 +00:00
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guides/source/action_cable_overview.md
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@ -780,6 +780,8 @@ The PostgreSQL adapter uses Active Record's connection pool, and thus the
application's `config/database.yml` database configuration, for its connection.
This may change in the future. [#27214](https://github.com/rails/rails/issues/27214)
NOTE: PostgreSQL has a [8000 bytes limit](https://www.postgresql.org/docs/current/sql-notify.html) on `NOTIFY` (the command used under the hood for sending notifications) which might be a constraint when dealing with large payloads.
### Allowed Request Origins
Action Cable will only accept requests from specified origins, which are