Re: smart shutdown at end of transaction (was: Default mode for shutdown)

Just for the ones interested in a view on another turf:

In Oracle "shutdown immediate" is the fastest _clean_ shutdown and "shutdown abort" is equal to "shutdown immediate" in PG.
The other modes are called "shutdown normal" and "shutdown transactional".


Wolfgang



________________________________
 Von: Tom Lane <tgl@sss.pgh.pa.us>
An: Simon Riggs <simon@2ndQuadrant.com> 
CC: Robert Haas <robertmhaas@gmail.com>; Alvaro Herrera <alvherre@commandprompt.com>; Magnus Hagander <magnus@hagander.net>; PostgreSQL-development <pgsql-hackers@postgresql.org> 
Gesendet: 20:48 Freitag, 27.April 2012
Betreff: Re: [HACKERS] smart shutdown at end of transaction (was: Default mode for shutdown) 
 
Simon Riggs <simon@2ndQuadrant.com> writes:
> On Fri, Apr 27, 2012 at 7:29 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> No, I'm not happy with that.  Smart shutdown is defined to not affect
>> current sessions.  I'm fine with having a fourth mode that acts as you
>> suggest (and, probably, even with making it the default); but not with
>> taking away a behavior that people may well be relying on.

> Agreed, but not sure what to call the new mode: "smarter"?

I'm not necessarily opposed to commandeering the name "smart" for the
new behavior, so that what we have to find a name for is the old "smart"
behavior.  How about

    slow    - allow existing sessions to finish (old "smart")
    smart    - allow existing transactions to finish (new)
    fast    - kill active queries
    immediate - unclean shutdown

            regards, tom lane