Re: max_wal_senders must die

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: max_wal_senders must die
Date: 2010-11-13 04:09:06
Message-ID: 201011130409.oAD496x22133@momjian.us
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Josh Berkus wrote:
>
> > None of us know. What I do know is that I don't want PostgreSQL to be
> > slower out of the box.
>
> Understandable. So it seems like the answer is getting replication down
> to one configuration variable for the common case. That eliminates the
> cycle of "oops, need to set X and restart/reload" without paying
> performance penalties on standalone servers.

Right. I propose that we set max_wal_senders to unlimited when
wal_level = hot_standby. When they tell us they are using hot_standby
via wal_level, why make them change another setting (max_wal_senders)?

Basically, we don't need to turn everything on by default, but some
settings should trigger other behavior automatically.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +

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