OCP-1Z0-052-V8 02-55題
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55. View the Exhibit to examine the output produced by the following query at three different times since
the database instance started and has experienced workloads of different capacities:
SQL> SELECT substr(component, 0, 10) COMP, current_size CS,
user_specified_size US
FROM v$memory_dynamic_components
WHERE current_size!=0;
What do you infer from this?
A. The database instance is running with manual PGA management.
B.The database instance is running with manual shared memory management.
C.The database instance has the MEMORY_TARGET value set to a nonzero value.
D.All sessions are connected to the database instance in dedicated mode, and no RMAN or parallel
query operations have been performed.
MM is set to 100 MB.
Answer: C
答案解析：
參考：053-162題：http://blog.csdn.net/rlhua/article/details/12761583
參考：http://blog.csdn.net/rlhua/article/details/12493791
動態效能檢視V$MEMORY_DYNAMIC_COMPONENTS顯示所有動態優化的記憶體元件的當前大小，其中包括SGA 和例項PGA 的總大小。
三次啟動的SGA的各個元件大小都一樣，是動態變化的，PGA也是動態變化的，所以此資料庫是處於自動記憶體管理即AMM，也即是說MEMORY_TARGET設定為非零值。
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