Windows Oracle disk queue 100%

Hello

I use a database of Oracle 9i on Windows Server 2003 Standard.

When I run a query that runs through about 30 large tables the disk i/o goes up to 100% for a few minutes.

Are there performance advice you can give me to study?

I'm guessing that something is configured wrong on the Oracle side, but I don't know where to look.

Its a Raid 5 disk configuration.

Thank you.

Joining tables that much is not exceptional. I'm working on view now po_negotiated_sources_v EBS who joined about 20 tables. There are many points of view with more.

In General, I discover I/O no excessive disc not as a problem but as a symptom of a problem. The solution is not not to adjust the e/s, but to remove the need for input/output. If you follow the usual SQL tuning cycle, starting with the collection of information on the execution plan, tables, indexes and statistics of the object and system.

--

John Watson

Oracle Certified Master s/n

Tags: Database

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