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    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。


     

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  • 原文地址:https://www.cnblogs.com/Babylon/p/7843376.html
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