create index foo1 on bla (a);
create index foo2 on bla (b);
create index foo3 on bla (a,b);
You say you need faster INSERT performance. Getting rid of some indexes
is a way, but can you tell a bit more about your hardware setup ?
For instance, if you only have one HDD, put an extra HDD in
Marinos Yannikos wrote:
Which version do you have? Since 8.1 pg can use a so called 'bitmap
index scan', because of this feature i guess you don't need the index
foo3. (if you have 8.1 or higher)
8.3.1 - foo3 is being used though in presence of both foo1 and foo2,
so I'd suppose that it's a b
am Wed, dem 26.03.2008, um 16:15:20 +0100 mailte Marinos Yannikos folgendes:
> A. Kretschmer schrieb:
> >>create index foo1 on bla (a);
> >>create index foo2 on bla (b);
> >>create index foo3 on bla (a,b);
> >>[...]
> >
> >Which version do you have? Since 8.1 pg can use a so called 'bitmap
> >inde
A. Kretschmer schrieb:
create index foo1 on bla (a);
create index foo2 on bla (b);
create index foo3 on bla (a,b);
[...]
Which version do you have? Since 8.1 pg can use a so called 'bitmap
index scan', because of this feature i guess you don't need the index
foo3. (if you have 8.1 or higher)
On Wed, 26 Mar 2008, A. Kretschmer wrote:
create index foo1 on bla (a);
create index foo2 on bla (b);
create index foo3 on bla (a,b);
Which version do you have? Since 8.1 pg can use a so called 'bitmap
index scan', because of this feature i guess you don't need the index
foo3. (if you have 8.1
am Wed, dem 26.03.2008, um 15:18:53 +0100 mailte Marinos Yannikos folgendes:
> Hello,
>
> we have several indexes such as:
>
> create index foo1 on bla (a);
> create index foo2 on bla (b);
> create index foo3 on bla (a,b);
>
> They are all used often by frequently used queries (according to
>
Hello,
we have several indexes such as:
create index foo1 on bla (a);
create index foo2 on bla (b);
create index foo3 on bla (a,b);
They are all used often by frequently used queries (according to
pg_statio_user_indexes), but we need somewhat higher INSERT/UPDATE
performance (having tuned mos
