Horton

Re: Connection slots reserved for replication

Alexander Kukushkin <cyberdemn@gmail.com>

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From: Alexander Kukushkin <cyberdemn@gmail.com>
To: Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp>
Cc: Masahiko Sawada <sawada.mshk@gmail.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2018-09-21T11:43:28Z
Lists: pgsql-hackers

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Hi,

On 20 September 2018 at 08:18, Kyotaro HORIGUCHI
<horiguchi.kyotaro@lab.ntt.co.jp> wrote:

>
> Instaed, we can iterally "reserve" connection slots for the
> specific use by providing ProcGlobal->walsenderFreeProcs. The
> slots are never stolen for other usage. Allowing additional
> walsenders comes after all the slots are filled to grab an
> available "normal" slot, it works as the same as the current
> behavior when walsender_reserved_connectsions = 0.
>
> What do you think about this?

Sounds reasonable, please see the updated patch.

Regards,
--
Alexander Kukushkin

Commits

  1. Fix description of WAL record XLOG_PARAMETER_CHANGE

  2. Move max_wal_senders out of max_connections for connection slot handling