| From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, Robert Haas <robertmhaas(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Magnus Hagander <magnus(at)hagander(dot)net> |
| Subject: | Re: smart shutdown at end of transaction (was: Default mode for shutdown) |
| Date: | 2012-04-28 09:39:31 |
| Message-ID: | 1335605971.21838.1.camel@vanquo.pezone.net |
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| Lists: | pgsql-hackers |
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.
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