Re: replication_reserved_connections

On 2013-07-28 02:23:47 +0200, Marko Tiikkaja wrote:
> While you could limit the number of connections for non-replication roles,
> that's not always possible or desirable.  I would like to introduce a way to
> reserve connection slots for replication.  However, it's not clear how this
> would work.  I looked at how superuser_reserved_connections is implented,
> and with small changes I could see how to implement two ideas:
> 
> Does anyone see a better way to do this?  I'm not too satisfied with either
> of these ideas.

Personally I think we should just shouldn't allow normal connections for
the backend slots added by max_wal_senders. They are internally *added*
to max_connections, so limiting that seems perfectly fine to me since
the system provides max_connections connections externally.

Hm... I wonder how that's managed for 9.4's max_worker_processes.

Greetings,

Andres Freund

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