Re: How many times has an index been used?

Steve,

If you are going to pull code from v$sqlarea, you will also want to use v$sqltext.

In that case, look up the paper at www.hotsos.com about joining v$sqltext and v$sqlarea, as the hash_value is defined as a different data type in each. This affects all releases prior to 8.0.5.

Also, you have no doubt considered that you will need to capture the current execution plan for each to do this, so as to see what indexes are being used.

Jared

On Thursday 31 May 2001 03:10, Wilkes, Steve wrote:
> Hi,
>
> Thanks for the replies to this question. Looks like I need >= 8i or trawl
> through the v$sqlarea either by spending money or writing a simple bit of
> pl/sql.
>
> Thanks,
>
> Steve Wilkes
> npower
> steve.wilkes_at_npower.com
>
>
> -----Original Message-----
> Sent: 29 May 2001 14:03
> To: Multiple recipients of list ORACLE-L
> Cc: steve.wilkes_at_npower.com
>
>
> Hi All,
>
> A cheaper solution to this is to use an AFTER LOGON trigger to set
> CREATE_STORED_OUTLINES to true. If the users have the CREATE ANY OUTLINE
> system
> privilege, you'll be able to see which indexes are being used in the
> DBA_OUTLINE_HINTS view.
>
> @ Regards,
> @ Steve Adams
> @ http://www.ixora.com.au/
> @ http://www.christianity.net.au/
>
>
> -----Original Message-----
> Sent: Tuesday, 29 May 2001 19:55
> To: Multiple recipients of list ORACLE-L
>
>
> There is also one called The Big Picture - from Bit by Bit
> www.bitbybit.co.uk - that scans all source, and SQL, and stores all
> execution plans in a BDE database. It then scans through all the exectution
> plans to determine whether an index is used or not.
>
> It doesn't however tell you how many times the index has *actually* been
> used..
>
> Mark
>
> -----Original Message-----
> Sent: Friday, May 25, 2001 09:18
> To: Multiple recipients of list ORACLE-L
>
>
>
> There is commercial software for determining this.
>
> www.teleran.com
> www.pinecone.com
>
> Both rather spendy.
>
> Jared
>
> On Thursday 24 May 2001 06:10, Wilkes, Steve wrote:
> > Hi,
> >
> > Does anyone know how to determine how many times an index has been used
> > or if it has been used at all? I have seen previous attempts by taking
> > snapshots of v$sqlarea and then automating an explain plan and extracting
> > the information that way. I would have thought that there must be an x$
> > table that records this information somewhere?
> >
> > Any ideas?
> >
> > Thanks in advance.
> >
> > Steve Wilkes
> > _______________________________
> > Oracle DBA
> > npower
> > email:steve.wilkes_at_npower.com
>
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