I know there is no benfit of having duplicate indexes.
Inorder for me to make change on production it requires lot of approvals and stuff.
I wnat to know if there is any major performance drawback for having duplicate composite index, so that i can push hard for the change. Let me know.
thanks for your looking into this.
On Wed, Oct 20, 2010 at 5:10 PM, Rob Sargent
<robjsargent@gmail.com> wrote:
If you can think of one benefit from having the redundant index then by
all means keep it. It certainly eludes me. Seems to me, removing an
un-necessary index on a huge table can only be a good thing.
On 10/20/2010 06:02 PM, DM wrote:
> Its a huge table in production, i dont want to take any risk.
>
> I can simulate and test this but i was to checking to see If any one
> knows off hand about this.
>
>
>
> I can simulate it but
> On Wed, Oct 20, 2010 at 4:57 PM, Rob Sargent <
robjsargent@gmail.com> <mailto:
robjsargent@gmail.com>> wrote:
>
> Hm. Run some queries; drop the second version of the index definition;
> re-run the same queries; report to the group. The redundant index isn't
> helping, that much is certain.
>
> On 10/20/2010 05:43 PM, DM wrote:
> > Composite Index question:
> >
> > I have composite index on 3 columns on a table, by mistake the
> composite
> > index was created twice on the table.
> >
> > Will there any performance issues on this table because of the 2 same
> > composite indexes?
> >
> > Thanks
> > Deepak
>
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