Re: Sync Rep v19

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Dimitri Fontaine <dimitri(at)2ndQuadrant(dot)fr>
Cc: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Sync Rep v19
Date: 2011-03-03 18:14:06
Message-ID: 1299176046.10703.392.camel@ebony
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On Thu, 2011-03-03 at 18:51 +0100, Dimitri Fontaine wrote:
> Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> > On Fri, 2011-03-04 at 00:02 +0900, Fujii Masao wrote:
> >> > * synchronous_standby_names = "*" matches all standby names
> >>
> >> Using '*' as the default seems to lead the performance degradation by
> >> being connected from unexpected synchronous standby.
> >
> > You can configure it however you wish. It seemed better to have an out
> > of the box setting that was useful.
>
> Well the HBA still needs some opening before anyone can claim to be a
> standby. I guess the default line would be commented out and no standby
> would be accepted as synchronous by default, assuming this GUC is sighup.

The patch sets "*" as the default, so all standbys are synchronous by
default.

Would you prefer it if it was blank, meaning no standbys are
synchronous, by default?

--
Simon Riggs http://www.2ndQuadrant.com/books/
PostgreSQL Development, 24x7 Support, Training and Services

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