Re: What happens to transactions durring a pg_dump?

On 1/9/06, Chris Hoover <revoohc(at)gmail(dot)com> wrote:
>
>
> On 1/9/06, Michael Fuhr <mike(at)fuhr(dot)org> wrote:
> > On Mon, Jan 09, 2006 at 12:22:27PM -0500, Chris Hoover wrote:
> > > I'm trying to understand better what happens to a transaction that is
> > > commited in the middle of a pg_dump. Is the transaction included in the
> > > database dump, or is it excluded.
> >
> > If you look at the pg_dump source code or turn on query logging,
> > you should see that pg_dump starts with
> >
> > BEGIN
> > SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
> >
> > See "Transaction Isolation" in the "Concurrency Control" chapter of the
> > documentation for an explanation of what that means.
> >
> >
> http://www.postgresql.org/docs/8.1/interactive/transaction-iso.html
> >
> > --
> > Michael Fuhr
> >
>
> Just to make sure I correctly understood what I read, once pg_dump issues
> the :
> BEGIN
> SET TRANSACTION ISOLATION LEVEL SERIALIZABLE
>
> The backup will only see transactions that were commited before the
> isolation level was set Is this correct? Any transactions that are commited
> while the backup is running are not seen by pg_dump.
>
> Correct?
>
> Thanks,
>
> Chris
>

correct

--
regards,
Jaime Casanova
(DBA: DataBase Aniquilator ;)