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

Peter Eisentraut <peter_e@gmx.net> writes:
> On fre, 2012-04-27 at 22:30 +0200, Andres Freund wrote:
>> In the few cases where I investigated it TMs don't use transactions
>> themselves (which I think is correct, they don't need them), so
>> terminating any idle session - which the TM would appear as, as its
>> not using txns - would leave prepared transactions in a limbo state
>> till the database is up again, instead of waiting till all prepared
>> transactions are either aborted or committed. It may also choose to
>> coordinate to abort all transactions, but all that is hard if the
>> database shuts you out.

> This would lead to another shutdown mode, one that terminates idle
> sessions unless they have prepared transactions.  That could be useful.

Huh?  Prepared transactions aren't associated with sessions.  At least
not in a context using a TM --- the TM will be doing commits or
rollbacks from a session different from the ones that ran the prepared
transactions.
        regards, tom lane