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
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