AIX平台ORACLE启用SGA大页面（LARGE PAGE）
下面是在AIX平台上面关于SGA的大页面的配置与监控1，aix支持的页的大小AIX支持4种页的大小，但是并不是每一个硬件平台都同时支持4种，可以使用下面的命令来查看p
下面是在AIX平台上面关于SGA的大页面的配置与监控
1，aix支持的页的大小
AIX支持4种页的大小，但是并不是每一个硬件平台都同时支持4种，可以使用下面的命令来查看
2，服务器空间，ORACLE启用大页的前提
ORACLE有下面三种类型的内存支持大页SGA,.DATA,.TEXT，这里只介绍SGA，香港虚拟主机，因为正常情况下我们也只配置SGA的。
如果ORACLE要启用大页，那么ORACLE的user需要具有 CAP_BYPASS_RAC_VMM and CAP_PROPAGATE属性，如果是在RAC环境中，ROOT,GRID(11G)用户也要有CAP_BYPASS_RAC_VMM and CAP_PROPAGATE属性使用如下命令查看与修改
3，AIX于大页相当的参数
lgpg_regions控制大页的个数lgpg_size控制页的大小，香港服务器租用，使用如下命令查看与修改
4，计算lgpg_regions的个数
5，修改 lru_file_repage
6，查看oracle sga是否使用了large page
使用svmon命令来查看
由于写文档这里登陆的主机不支持large page，所以这里拿了网上的一个图片
7，使用vmstat来查看large page使用情况
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