Re: max_standby_delay considered harmful

Dimitri Fontaine <dfontaine@hi-media.com>

From: Dimitri Fontaine <dfontaine@hi-media.com>
To: Greg Smith <greg@2ndquadrant.com>
Cc: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>, Tom Lane <tgl@sss.pgh.pa.us>, Simon Riggs <simon@2ndquadrant.com>, pgsql-hackers@postgreSQL.org
Date: 2010-05-06T09:26:30Z
Lists: pgsql-hackers
Greg Smith <greg@2ndquadrant.com> writes:
> If you need a script that involves changing a server setting to do
> something, that translates into "you can't do that" for a typical DBA.  The
> idea of a program regularly changing a server configuration setting on a
> production system is one you just can't sell.  That makes this idea
> incredibly more difficult to use in the field than any of the workarounds
> that cope with the known max_standby_delay issues.

I still think that the best API we can do in a timely fashion for 9.0
is:

  standby_conflict_winner = replay|queries

  pg_pause_recovery() / pg_resume_recovery()

It seems to me those two functions are only exposing existing facilities
in the code, so that's more an API change that a new feature
inclusion. Of course I'm certainly wrong. But the code has already been
written.

I don't think we'll find any better to offer our users in the right time
frame. Now I'll try to step back and stop repeating myself in the void :)

Regards,
-- 
dim