Re: Postgres batch write very slow - what to do

On 3/13/07, femski <hypertree(at)yahoo(dot)com> wrote:
>
> Folks !
>
> I have a batch application that writes approx. 4 million rows into a narrow
> table. I am using JDBC addBatch/ExecuteBatch with auto commit turned off.
> Batch size is 100. So far I am seeing Postgres take roughly five times the
> time it takes to do this in the Oracle.
>
> I have played with many parameters. Only one that seems to have any affect
> is fsync - but thats only 10% or so.
> Initially I got the warning that checkpoints were happening too often so I
> increased the segments to 24. Warnings stopped, but no real improvement in
> performance.
>
> Is postgres really that slow ? What am I missing ?

how many inserts/sec are you getting approximately. Maybe you have
some type of network issue.

merlin