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After partitioning, it runs slower

548150Jul 17 2009 — edited Jul 20 2009

After partitioning, it runs slower. Why?

I have an application job running on the Oracle 11g database with Windows 2003 server environment.
Because of the bad performance, I make a diagnosis and find the Sequential Read Wait event is the main root cause. This event always related with the hot object issue or the I/O problems. In order to spread all the data around multi-segments, I partition all the large tables and its indexes (using the LOCAL option). But unexpected result comes out. The performance get worse.

Counld you tell me why?

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Locked on Aug 17 2009

Added on Jul 17 2009

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