Database Buffer Cache (79)

The database buffer cache is the portion of the SGA that holds copies of data blocks
read from datafiles. All user processes concurrently connected to the instance share
access to the database buffer cache.
The database buffer cache and the shared SQL cache are logically segmented into
multiple sets. This organization into multiple sets reduces contention on
multiprocessor systems.

Database Buffer Cache : 儲存從資料檔案中讀取的資料塊 ， 使用者程式可共享 。
邏輯的分為多個子段 ， 以便減少多使用者之間的競爭

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