Re: Slow performance on Windows .NET and OleDb - Mailing list pgsql-performance

From Merlin Moncure
Subject Re: Slow performance on Windows .NET and OleDb
Date
Msg-id b42b73150603290605v598769bbka6dc187174d0da@mail.gmail.com
Whole thread Raw
In response to Re: Slow performance on Windows .NET and OleDb  ("Greg Quinn" <greg@officium.co.za>)
List pgsql-performance
On 3/29/06, Greg Quinn <greg@officium.co.za> wrote:
> > how many rows does it return ? a few, or a lot ?
>
> 3000 Rows - 7 seconds - very slow
>
> Which client library may have a problem? I am using OleDb, though haven't
> tried the .NET connector yet.


esilo=# create temp table use_npgsql as select v, 12345 as a, 'abcdef'
as b, 'abcdef' as c, 4 as d from generate_series(1,100000) v;

SELECT
Time: 203.000 ms
esilo=# explain analyze select * from use_npgsql;
                                                    QUERY PLAN
-------------------------------------------------------------------------------------------------------------------
 Seq Scan on use_npgsql  (cost=0.00..1451.16 rows=61716 width=76)
(actual time=0.007..176.106 rows=100000 loops=1)
 Total runtime: 336.809 ms
(2 rows)

I just pulled out 100k rows in about 1/3 second.    The problem is not
your postgresql configuration.  Your problem is possibly in the oledb
driver.  The last time I looked at it, it was not production ready.

http://pgfoundry.org/frs/?group_id=1000140&release_id=407

Merlin

pgsql-performance by date:

Previous
From: "Merlin Moncure"
Date:
Subject: Re: Decide between Postgresql and Mysql (help of
Next
From: george young
Date:
Subject: Re: simple join uses indexes, very slow