用MEMORYSTATUS这个api，参数dwAvailPhys The MEMORYSTATUS structure contains information about current memory availability. The GlobalMemoryStatus function uses this structure. typedef struct _MEMORYSTATUS { // mst DWORD dwLength; // sizeof(MEMORYSTATUS) DWORD dwMemoryLoad; // percent of memory in use DWORD dwTotalPhys; // bytes of physical memory DWORD dwAvailPhys; // free physical memory bytes DWORD dwTotalPageFile; // bytes of paging file DWORD dwAvailPageFile; // free bytes of paging file DWORD dwTotalVirtual; // user bytes of address space DWORD dwAvailVirtual; // free user bytes } MEMORYSTATUS, *LPMEMORYSTATUS; MembersdwLengthIndicates the size of the structure. The calling process should set this member prior to calling GlobalMemoryStatus. dwMemoryLoadSpecifies a number between 0 and 100 that gives a general idea of current memory utilization, in which 0 indicates no memory use and 100 indicates full memory use. dwTotalPhysIndicates the total number of bytes of physical memory. dwAvailPhysIndicates the number of bytes of physical memory available. dwTotalPageFileIndicates the total number of bytes that can be stored in the paging file. Note that this number does not represent the actual physical size of the paging file on disk. dwAvailPageFileIndicates the number of bytes available in the paging file. dwTotalVirtualIndicates the total number of bytes that can be described in the user mode portion of the virtual address space of the calling process. dwAvailVirtualIndicates the number of bytes of unreserved and uncommitted memory in the user mode portion of the virtual address space of the calling process.
The MEMORYSTATUS structure contains information about current memory availability. The
GlobalMemoryStatus function uses this structure. typedef struct _MEMORYSTATUS { // mst
DWORD dwLength; // sizeof(MEMORYSTATUS)
DWORD dwMemoryLoad; // percent of memory in use
DWORD dwTotalPhys; // bytes of physical memory
DWORD dwAvailPhys; // free physical memory bytes
DWORD dwTotalPageFile; // bytes of paging file
DWORD dwAvailPageFile; // free bytes of paging file
DWORD dwTotalVirtual; // user bytes of address space
DWORD dwAvailVirtual; // free user bytes } MEMORYSTATUS, *LPMEMORYSTATUS;
MembersdwLengthIndicates the size of the structure. The calling process should set this member prior to calling GlobalMemoryStatus. dwMemoryLoadSpecifies a number between 0 and 100 that gives a general idea of current memory utilization, in which 0 indicates no memory use and 100 indicates full memory use. dwTotalPhysIndicates the total number of bytes of physical memory. dwAvailPhysIndicates the number of bytes of physical memory available. dwTotalPageFileIndicates the total number of bytes that can be stored in the paging file. Note that this number does not represent the actual physical size of the paging file on disk. dwAvailPageFileIndicates the number of bytes available in the paging file. dwTotalVirtualIndicates the total number of bytes that can be described in the user mode portion of the virtual address space of the calling process. dwAvailVirtualIndicates the number of bytes of unreserved and uncommitted memory in the user mode portion of the virtual address space of the calling process.