am Wed, dem 11.07.2007, um 22:19:58 +0200 mailte Andreas Kretschmer folgendes:
> > Also, part of the problem here looks to be an overestimate of the number
> > of rows matching ab = 347735. It might help to increase the statistics
> > target for that column.
>
> I will try this tomorrow and info
On 7/11/07, Alex Deucher <[EMAIL PROTECTED]> wrote:
On 7/11/07, A. Kretschmer <[EMAIL PROTECTED]> wrote:
> am Wed, dem 11.07.2007, um 14:52:01 -0400 mailte Alex Deucher folgendes:
> > >Okay, i got a really different plan, but i expected _NOT_ a
> > >performance-boost like this. I expected the op
Tom Lane <[EMAIL PROTECTED]> schrieb:
Thanks you and Alex for the response.
> > PostgreSQL 8.1.4 on i386-pc-linux-gnu, compiled by GCC cc (GCC) 3.3.5
> > (Debian 1:3.3.5-13)
>
> You need a newer one.
I know ;-)
>
> This is simply a stupid choice on the part of choose_bitmap_and() ---
> it's
Andreas Kretschmer <[EMAIL PROTECTED]> writes:
> Okay, i know, not really a recent version:
> PostgreSQL 8.1.4 on i386-pc-linux-gnu, compiled by GCC cc (GCC) 3.3.5 (Debian
> 1:3.3.5-13)
You need a newer one.
> -> BitmapAnd (cost=1217.69..1217.69 rows=39 width=0) (actual
> time=163.68
On 7/11/07, A. Kretschmer <[EMAIL PROTECTED]> wrote:
am Wed, dem 11.07.2007, um 14:52:01 -0400 mailte Alex Deucher folgendes:
> >Okay, i got a really different plan, but i expected _NOT_ a
> >performance-boost like this. I expected the opposite.
> >
> >
> >It's not a really problem, i just playe
am Wed, dem 11.07.2007, um 14:52:01 -0400 mailte Alex Deucher folgendes:
> >Okay, i got a really different plan, but i expected _NOT_ a
> >performance-boost like this. I expected the opposite.
> >
> >
> >It's not a really problem, i just played with this. But i'm confused
> >about this...
> >
>
>
On 7/11/07, Andreas Kretschmer <[EMAIL PROTECTED]> wrote:
Hi,
Okay, i know, not really a recent version:
PostgreSQL 8.1.4 on i386-pc-linux-gnu, compiled by GCC cc (GCC) 3.3.5 (Debian
1:3.3.5-13)
I have a fresh ANALYZED table with some indexes.
scholl=*# set enable_bitmapscan=1;
SET
scholl=*#
Hi,
Okay, i know, not really a recent version:
PostgreSQL 8.1.4 on i386-pc-linux-gnu, compiled by GCC cc (GCC) 3.3.5 (Debian
1:3.3.5-13)
I have a fresh ANALYZED table with some indexes.
scholl=*# set enable_bitmapscan=1;
SET
scholl=*# explain analyse select sum(flaeche) from bde_meldungen where
