Re: How to force PostgreSQL to use multiple cores within one connection?

["Nikolas Everett" <nik9000@xxxxxxxxx>]

If you happen to be using JDBC you can also get copy to work:

http://kato.iki.fi/sw/db/postgresql/jdbc/copy/

On Wed, Oct 1, 2008 at 9:24 AM, Merlin Moncure <mmoncure@xxxxxxxxx> wrote:

On Wed, Oct 1, 2008 at 6:44 AM, Sergey A. <n39052@xxxxxxxxx> wrote:
> Hello.
>
> My application generates a large amount of inserts (~ 2000 per second)
> using one connection to PostgreSQL. All queries are buffered in memory
> and then the whole buffers are send to DB. But when I use two
> connections to PostgreSQL instead of one on dual core CPU (i.e. I use
> two processes of PostgreSQL) to insert my buffers I see that things
> goes 1.6 times faster.
>
> Using several connections in my application is somewhat tricky, so I
> want to move this problem to PostgreSQL's side. Is there any method
> for PostgreSQL to process huge inserts coming from one connection on
> different cores?

If you are buffering inserts, you can get an easy performance boost by
using copy as others have suggested.  Another approach is to use
mutli-row insert statement:

insert into something values (1,2,3), (2,4,6), ...

Using multiple cpu basically requires multiple connections.  This can
be easy or difficult depending on how you are connecting to the
database.

merlin

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