RE: Shared Pool info

From: Raj Gopalan <raj.gopalan_at_netdecisions.co.uk>
Date: Tue, 05 Jun 2001 05:05:29 -0700
Message-ID: <F001.0031BB74.20010605042520@fatcity.com>

Thanks Chris.

The problem I am facing is 100% CPU usage and memory paging out at times. I tought the starting point is v$sqlarea. Purchasing of Precise SQL or SQL Vision can not happen here immediately. The RAM size is 512MB and SGA is 210MB. The buffer cache hit ratio is 99%.

I was just wondering is there any way to find out the cause of this problem?

TIA Cheers

Raj

-----Original Message-----
Sent: 01 June 2001 19:51
To: Multiple recipients of list ORACLE-L

Oracle has no guarentee how long statistics and plans will be available for statements, depending on the activity of the database they may be there for 2 seconds they may be there for 2 weeks.

Products like Precise SQL and SQL Vision Lab help in that manor where they capture transactions and activity continuously in a non-intrusive manor. This is the only guarenteed way to get 99.999% of the transactions.

"Walking on water and developing software from a specification are easy if both are frozen."

Christopher R. Spence
Oracle DBA
Fuelspot

-----Original Message-----
Sent: Friday, June 01, 2001 12:16 PM
To: Multiple recipients of list ORACLE-L

DBAs

The statistics in v$sqlarea is getting flushed very often.

In the morning I found the a query which has more than 10,000 disk reads as the top one. But now the top most query with disk reads has not more than 100 disk reads. I have not bouncd the DB or flushed the shared pool. The overall library cache hit ratio is 97%.where us SQLAREA hit ratio is 60%.

Any Idea what could be reason?

TIA, Raj
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Author: Raj Gopalan
INET: raj.gopalan_at_netdecisions.co.uk

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Author: Christopher Spence
INET: cspence_at_FuelSpot.com

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RE: Shared Pool info - V$sqlarea.