"Jim C. Nasby" <[EMAIL PROTECTED]> writes:
> No, this is 8.1.3, and it's a production machine so I'd prefer not to go
> about dropping indexes to get cost comparisons; unless there's some way
> to disable the use of an index in a given backend?
The traditional hack for that is
beg
On Wed, Jul 19, 2006 at 07:54:49PM -0400, Tom Lane wrote:
> "Jim C. Nasby" <[EMAIL PROTECTED]> writes:
> > Indeed, if I find a case where there's a large enough number of rows it
> > will choose the smaller index. But I'm wondering if it would be better
> > to always favor the smaller index, since
"Jim C. Nasby" <[EMAIL PROTECTED]> writes:
> Indeed, if I find a case where there's a large enough number of rows it
> will choose the smaller index. But I'm wondering if it would be better
> to always favor the smaller index, since it would (presumably) be easier
> to keep it in cache?
AFAICS, in
On Wed, Jul 19, 2006 at 07:00:40PM -0400, Tom Lane wrote:
> "Gregory Maxwell" <[EMAIL PROTECTED]> writes:
> > On 7/19/06, Jim C. Nasby <[EMAIL PROTECTED]> wrote:
> > [snip]
> >> \d does list bdata__ident_filed_departure before bdata_ident; I'm
> >> wondering if the planner is finding the first inde
"Gregory Maxwell" <[EMAIL PROTECTED]> writes:
> On 7/19/06, Jim C. Nasby <[EMAIL PROTECTED]> wrote:
> [snip]
>> \d does list bdata__ident_filed_departure before bdata_ident; I'm
>> wondering if the planner is finding the first index with ident_id in it
>> and stopping there?
>> From my own experie
On 7/19/06, Jim C. Nasby <[EMAIL PROTECTED]> wrote:
[snip]
\d does list bdata__ident_filed_departure before bdata_ident; I'm
wondering if the planner is finding the first index with ident_id in it
and stopping there?
From my own experience it was grabbing the first that has the
requested fiel
Client has a table with 9 indexes; one is on just ident_id and takes up
75181 pages, the other is on ident_id and another field and uses 117461
pages.
"bdata__ident_filed_departure" btree (ident_id, filed_departuretime),
tablespace "array4"
"bdata_ident" btree (ident_id), tablespace "array4"
