Re: Re: [COMMITTERS] pgsql: Make CheckRequiredParameterValues() depend upon correct

Robert Haas <robertmhaas@gmail.com>

From: Robert Haas <robertmhaas@gmail.com>

To: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>

Cc: Simon Riggs <simon@2ndquadrant.com>, Fujii Masao <masao.fujii@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Alvaro Herrera <alvherre@commandprompt.com>, pgsql-hackers@postgresql.org

Date: 2010-04-29T13:16:26Z

Lists: pgsql-hackers

On Thu, Apr 29, 2010 at 9:07 AM, Heikki Linnakangas
<heikki.linnakangas@enterprisedb.com> wrote:
> Robert Haas wrote:
>> How about this one?  The administrator sets up a master and a slave.
>> She's heard about this new Hot Standby feature and so decides to
>> enable it on the slave just to play around with it.  Subsequently, she
>> takes a better job at another company and they hire a new
>> administrator, who thinks the Hot Standby WAL may be causing a
>> performance problem on the master, so he switches wal_mode to archive.
>>  Six months later the primary fails.
>
> Umm, I don't see the problem. For high availability purposes, the
> standby works just as well with wal_mode='archive'. Or are you saying
> that the standby was configured with recovery_connections='on', and
> failed to start for those six months because hot standby could not be
> enabled, and no-one noticed?

Yep.

...Robert