From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
---|---|
To: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Magnus Hagander <magnus(at)hagander(dot)net>, Robert Haas <robertmhaas(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: smart shutdown at end of transaction (was: Default mode for shutdown) |
Date: | 2012-04-28 11:08:42 |
Message-ID: | CA+U5nM+nQgbgib4v=CRt3kGqN73q-ekHfPjZNJVw6cCoTg9GNA@mail.gmail.com |
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On Fri, Apr 27, 2012 at 8:36 PM, Heikki Linnakangas
<heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
> All the modes indeed wait (except for immediate), so I think it would make
> sense to define the modes in terms of *what* they wait for.
>
> wait sessions - allow existing sessions to finish (old "smart")
> wait transactions - allow existing transactions to finish (new)
> wait checkpoint - kill active queries
> wait none - unclean shutdown
>
> Hmm, the latter two are perhaps a bit confusing. So maybe:
>
> wait_sessions - allow existing sessions to finish (old "smart")
> wait_transactions - allow existing transactions to finish (new)
>
> fast - kill active queries
> immediate - unclean shutdown
>
> Just thinking out loud here..
+1
Wonderfully clear, little need to check the docs to see what the terms
actually mean.
New names for both allow us to deprecate use of "smart", since it was
a silly term anyway. We keep smart for one more
release==wait_sessions, then throw an error in later releases.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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