Re: Performance issues with compaq server

On 8 May 2002, Doug McNaught wrote:

> Holger Marzen <holger(at)marzen(dot)de> writes:
>
> > ACK. On a given hardware I get about 150 inserts per second. Using a
> > begin/end transaction for a group of 100 inserts speeds it up to about
> > 450 inserts per second.
>
> COPY is even faster as there is less query parsing to be done, plus
> you get a transaction per COPY statement even without BEGIN/END.

Yes, but I wanted to change something in some rows, so I used perl and
insert.

> > But beware: if one insert fails (duplicate key, faulty data) then you
> > have to re-insert the remaining rows as single transactions, else all
> > rows of the previous transaction are discarded.
>
> Hmm don't you have to ROLLBACK and redo the whole transaction without
> the offending row(s), since you can't commit while in ABORT state? Or
> am I misunderstanding?

Postgres complains and doesn't accept the following inserts after a
failed one until end of transaction. I didn't have the time yet to
figure out if it rolls back the preceeding inserts.

Is there a rule in SQL standards that describes what should happen if
some statemens in a transaction fail and the program issues a commit?

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