Re: Session disconnected

On Thu, 2003-03-13 at 05:28, Jan.Lindgren wrote:
> Hi,
> I got a question on how postgres handle an interrupted transaction,
> regarding rollback, commit.
>
> We do have a rather unstable connection to our db and sometime a
> transaction/session will be disconnected but the process is still
> visible on the server.
>
> How will postgres handle an update transaction from a client to the
> server that is disconnected?
> -          will the query be rollbacked automatically ??
> -          is it safe to just kill the hanging process on the server?
>

More or less yes. Without getting too far into the pg internals,
understand that any information written in the database is not marked as
valid until it is given a commit. Eventually vacuum will notice that the
transaction tied to the entry is no longer valid, and will remove the
dead weight.

Robert Treat