Question On Statistics Gathering

From: Meng, Dennis <Dennis.Meng_at_cardinal.com>
Date: Fri, 27 Jun 2003 12:57:28 -0700
Message-ID: <F001.005BB5A8.20030627123418@fatcity.com>

Hi All,
Currently we have a very large database ( 8.1.7.4 ) on Tru64 that is having query optimization problems. Lacking good, up-to-date statistics is the main cause of it. Because of the size and availability window we can't afford to analyze the whole schema. Now 8i has
a new feature that only gathers stats when stale. You have to set table to monitoring mode first.
I am intrigued by this new feature and am reading up on it and have 2 questions: 1. How reliable and bug-free is this feature? 2. We do a lot of sqlldr direct path, which bypasses table insert. Will this feature catch the rows inserted that way?

TIA
Dennis
-----Original Message-----
Sent: Friday, June 27, 2003 2:30 PM
To: Multiple recipients of list ORACLE-L

One of our third party applications gave us the following message:

ORA-04031: unable to allocate 4192 bytes of shared memory

Environment is Oracle 8.1.7 on AIX 4.3.2

The output from "select * from v$sgastat showed about 3 mb free out of a total of 40 mb of shared pool. I increased the size of shared pool to 60 mb and started to watch the "shared pool"/"free memory" value in v$sgastat. It seems to vary between about 3 and 11 mb.

What is the application likely to be doing that requires it to allocate shared pool?
How do I know when I have the shared pool value in init.ora set high enough so that I won't get the ORA-04031 errors?
Is there any other init.ora parameter I ought to be looking at here?

Thanks,
Peter Schauss
--

Please see the official ORACLE-L FAQ: http://www.orafaq.net
--

Author: Schauss, Peter
INET: [EMAIL PROTECTED]

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------

To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
--

Please see the official ORACLE-L FAQ: http://www.orafaq.net
--

Author: Meng, Dennis
INET: [EMAIL PROTECTED]

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------