Обсуждение: postgres copy command very slow.

Hi,

We have postgresql 7.4.1 running on Mac OS.we are
doing a conversion from mysql to postgres. I'm
importing the table dumps using copy command in
postgres. Copy takes 2 min to import 427938 rows in
one table and at the same time it takes more than 2
hrs for 2415768 rows.. no of columns are similar in
both the tables. i'm not able to figure out why it is
getting too slower?

Does anyone know why there is lot of difference in
performance?

Any hint is highly appreciated.

regards
Priya

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On Fri, 26 Mar 2004, Hemapriya wrote:

> Hi,
>
> We have postgresql 7.4.1 running on Mac OS.we are
> doing a conversion from mysql to postgres. I'm
> importing the table dumps using copy command in
> postgres. Copy takes 2 min to import 427938 rows in
> one table and at the same time it takes more than 2
> hrs for 2415768 rows.. no of columns are similar in
> both the tables. i'm not able to figure out why it is
> getting too slower?

Are the field types the same? Indexes on the two tables?

For the best chance of a good diagnosis, please post full details of
both tables - constraints, indexes, and field types at least.

--

Sam Barnett-Cormack
Software Developer                           |  Student of Physics & Maths
UK Mirror Service (http://www.mirror.ac.uk)  |  Lancaster University