问题描述
在Windows上，通常情况下，一个32位进程只能访问2GB的RAM(或者在boot.ini文件中带有特殊开关的情况下可以访问3GB).在64位操作系统上运行32位进程时，有多少可用内存?是否有任何特殊的开关或设置可以更改此设置?
On Windows, under normal circumstances a 32 bit process can only access 2GB of RAM (or 3GB with a special switch in the boot.ini file). When running a 32 bit process on a 64 bit operating system, how much memory is available? Are there any special switches or settings that can change this?
推荐答案
默认为2 GB.如果应用程序知道大地址空间(与/LARGEADDRESSAWARE链接)，它将获得4 GB(而不是3 GB)，请参阅 http://msdn.microsoft.com/en-us/library/aa366778.aspx )
2 GB by default. If the application is large address space aware (linked with /LARGEADDRESSAWARE), it gets 4 GB (not 3 GB, see http://msdn.microsoft.com/en-us/library/aa366778.aspx)
由于许多应用程序都将指针的最高位设置为零，因此它们仍限于2 GB.
They're still limited to 2 GB since many application depends on the top bit of pointers to be zero.
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