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Documented that process local channels for the same worker have shared capacity #433

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10 changes: 10 additions & 0 deletions README.rst
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Expand Up @@ -173,6 +173,16 @@ to 10, and all ``websocket.send!`` channels to 20:
If you want to enforce a matching order, use an ``OrderedDict`` as the
argument; channels will then be matched in the order the dict provides them.

.. note::
The capacity for process local channels (Formatted with ``!``) is enforced
against a single shared Redis queue for the whole worker process and not per each local
channel in benefit of better efficiency.
So a burst of requests to one local channel can cause
``ChannelFull`` to be raised for a separate, otherwise-empty connection channel
that is handled by the same worker since the check applies to the process's
combined queue length rather than the specific channel being accessed.


.. _encryption:

``symmetric_encryption_keys``
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