Re: [Retrieved]RE: backup and recovery

On Tue, 23 Mar 2004 19:50:24 -0500 (EST), Bruce Momjian
<pgman(at)candle(dot)pha(dot)pa(dot)us> wrote:

> Naomi Walker wrote:
>>
>> I'm not sure of the correct protocol for getting things on the "todo"
>> list. Whom shall we beg?
>>
>
> Uh, you just ask and we discuss it on the list.
>
> Are you using INSERTs from pg_dump? I assume so because COPY uses a
> single transaction per command. Right now with pg_dump -d I see:
>
> --
> -- Data for Name: has_oids; Type: TABLE DATA; Schema: public; Owner:
> postgres
> --
>
> INSERT INTO has_oids VALUES (1);
> INSERT INTO has_oids VALUES (1);
> INSERT INTO has_oids VALUES (1);
> INSERT INTO has_oids VALUES (1);
>
> Seems that should be inside a BEGIN/COMMIT for performance reasons, and
> to have the same behavior as COPY (fail if any row fails). Commands?
>
> As far as skipping on errors, I am unsure on that one, and if we put the
> INSERTs in a transaction, we will have no way of rolling back only the
> few inserts that fail.
>
That is right but there are sutuation when you prefer at least some
data to be inserted and not all changes to be ralled back because
of errors.
> ---------------------------------------------------------------------------
>
>> >
>> >That brings up a good point. It would be extremely helpful to add two
>> >parameters to pg_dump. One, to add how many rows to insert before a
>> >commit, and two, to live through X number of errors before dying (and
>> >putting the "bad" rows in a file).
>> >
>> >
>> >At 10:15 AM 3/19/2004, Mark M. Huber wrote:
>> > >What it was that I guess the pg_dump makes one large transaction and
>> our
>> > >shell script wizard wrote a perl program to add a commit transaction
>> > >every 500 rows or what every you set. Also I should have said that
>> we were
>> > >doing the recovery with the insert statements created from pg_dump.
>> So...
>> > >my 500000 row table recovery took < 10 Min.
>> > >
>