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Oracle 11G OCP 1Z0-052 63

原创 Oracle 作者:LuiseDalian 时间:2014-06-12 06:48:57 0 删除 编辑
(63)Examine the values for the following initialization parameters:

FAST_START_MTTR_TARGET = 0

LOG_CHECKPOINT_INTERVAL = 0

Which two will be the implications of these values in your database? (Choose two.)

A. The SGA advisor will be disabled.

B. The MTTR advisor will be enabled.

C. Automatic checkpoint tuning will be disabled.

D. Checkpoint information will not be written to the alert log file.

答案:(B、C)

解析:

FAST_START_MTTR_TARGET,允许你指定数据库进行crash revoery的时间.

如果指定了LOG_CHECKPOINT_INTERVAL参数,FAST_START_MTTR_TARGET参数将被覆盖.

《Performance Tuning》 10.5.3.3.1

为了开启MTTR Advisor,需要设置STATISTICS_LEVEL和FAST_START_MTTR_TARGET两个参数.

STATISTICE_LEVEL控制所有的ADVISOR是否开启,并不只是针对MTTR Advisor。要设置为TYPICAL | ALL

如果FAST_START_MTTR_TARGET = 0,则MTTR Advisor开启

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