Overview of the Program Global Areas (97)

A program global area (PGA) is a memory region that contains data and control
information for a server process. It is a nonshared memory created by Oracle when a
server process is started. Access to it is exclusive to that server process and is read and
written only by Oracle code acting on behalf of it. The total PGA memory allocated by
each server process attached to an Oracle instance is also referred to as the aggregated
PGA memory allocated by the instance.

程式全域性區
1. 是指包含服務的資料和控制資訊的記憶體區域
2. 在伺服器程式啟動時由Oracle建立的非空閒的記憶體段
3. 總的pga記憶體大小由Oracle例項相關聯的伺服器程式分配的記憶體合計[@more@]