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Oracle 11G OCP 1Z0-053 421

原创 Oracle 作者:LuiseDalian 时间:2014-10-11 07:56:13 0 删除 编辑
(421)When tuning Automatic PGA Memory Management,which of the following views will provide the information specified?

A. The V$PGA_TARGET_ADVICE view shows the predicted cache hit-ratio improvement if you increase PGA_AGGREGATE_TARGET.

B. The V$PGA_TARGET_ADVICE view shows how the V$SQL_WORKAREA histogram will change if you change the value of PGA_AGGREGATE_TARGET.

C. The V$PGA_TARGET_ADVICE_HISTOGRAM view shows how the V$SQL_WORKAREA_HISTOGRAM will change if you switch between Manual and Automatic PGA Memory Management.

D. The V$PGA_TARGET_ADVICE view shows how performance will improve for the different work areas if you switch from Manual to Automatic PGA Memory Management.

答案:(A)

解析:

V$PGA_TARGET_ADVICE和V$PGA_TARGET_ADVICE_HISTOGRAM的说明

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