RE: db file scattered read
- From: "Justin Cave" <justin@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 6 Aug 2004 20:21:34 -0600
I believe that MONITORING instructs Oracle to keep a rough count of the
number of rows in a table that have changed since the last time statistics
were gathered, so that when you gather statistics next, if you specify
GATHER STALE, Oracle will know which tables it actually needs to gather
statistics on. I don't believe that MONITORING instructs Oracle to update
the statistics automatically.
Justin Cave
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
On Behalf Of Mladen Gogala
Sent: Friday, August 06, 2004 8:01 PM
To: oracle-l@xxxxxxxxxxxxx
Subject: Re: db file scattered read
On 08/06/2004 08:19:49 PM, Lyndon Tiu wrote:
>
> I have to analyze manually all the time?
In 9i you sen set table to "MONITORING", and Oracle will collect statistics
automatically. In 9i you can set dynamic sampling to 4 and Oracle will
collect statistics during parse.
--
Mladen Gogala
Oracle DBA
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