053-640

Examine the parameter setting in your database:

Which statement is correct about the database?
A. Automatic memory management is disabled because PGA_AGGREGATE_TARGET and SGA_TARGET are not set
B. The instance is started but the database will not be opened until PGA_AGGREGATE_TARGET and SGA_TARGET are set
C. The database is opened but users cannot perform transactions until PGA_AGGREGATE_TARGET and SGA_TARGET are set
D. Automatic memory management is enabled and, as per policy, 60% of the memory for System Global Area (SGA) and 40% of the memory for Program Global Area (PGA) will be distributed at startup

  由于设置了 memory_target,所以 AMM 是启用的。数据库是可以打开,并且用户可以执行事务,AB,C 错误
一般情况 PGA 20%,对于 DSS 系统,这个值可以更高可以达到 70%,D 对。


 

posted @ 2017-11-16 11:17  巴啦啦大魔王  阅读(76)  评论(0编辑  收藏  举报