You could see high such waits in your database if you are using automatic memory management of the SGA ( the new feature in Oracle 10G )
Solution : Set manually the memory components of the SGA's database .
see also http://www.nocoug.org/Journal/NoCOUG_Journal_201008.pdf
Partitioning -- 3b : More Indexes on Partitioned Table - In the previous blog post, I had demonstrated a Global (Non-Partitioned) Index and a Local (Partitioned) Index. A Global Index itself may be partitioned. ...
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