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  • Oracle调整SGA大小

    Oracle 11g 只要设置 memory 就可以了。不需要单独对 sga_max_size 进行设置,
    设置memory_max_target、memory_target  一般原则是 物理内存的1/2。设好了重启实例,sga_max_size 将自动变成memory_max_target设置的值

    memory_max_target < shm 切记,否则Oracle实例将启动失败,报

    ORA-00845: MEMORY_TARGET not supported on this system 错,点击查看shm设置

    ------------------------------

    SQL> show parameter sga

    NAME TYPE VALUE
    ------------------------------------ ----------- ------------------------------
    lock_sga boolean FALSE
    pre_page_sga boolean FALSE
    sga_max_size big integer 512M
    sga_target big integer 512M
    SQL>


    SQL> show parameter memory

    NAME TYPE VALUE
    ------------------------------------ ----------- ------------------------------
    hi_shared_memory_address integer 0
    memory_max_target big integer 0
    memory_target big integer 0
    shared_memory_address integer 0
    SQL>


    sql>alter system set memory_max_target = 15G scope=spfile;
    sql>alter system set memory_target = 15G scope=spfile;

    shutdown immediate
    startup

    SQL> show parameter memory

    NAME TYPE VALUE
    ------------------------------------ ----------- ------------------------------
    hi_shared_memory_address integer 0
    memory_max_target big integer 15G
    memory_target big integer 15G
    shared_memory_address integer 0
    SQL>



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  • 原文地址:https://www.cnblogs.com/vipsoft/p/2537270.html
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