mem (查看使用了多少内存以及有多少内存可用)

Displays the amount of used and free memory in your system.

MEM [/CLASSIFY | /DEBUG | /FREE | /MODULE module name] [/PAGE]

mem

This command would display information about your memory, as seen in the examples below.

Microsoft Windows 95 and Windows 98 example output:

Memory type        Total       Used    Free
---------------    ------      ------  ------
Conventional       640 k       52 k    588 k
Upper              0 k         0 k     0 k
Reserved           384 k       384 k   0 k
Extended (XMS)     31,768 k    168 k   31,576 k
---------------    ------      ------  ------
Total memory       31,768 k    168 k   31,576 k
Total under 1 MB   640 k       52 k    588 k
Total Expanded (EMS)       32 M (33,046,528 bytes)
Free Expanded (EMS)        16 M (16,777,216 bytes)

Largest executable program size            588 K (602,512 bytes)
Largest free upper memory block            0 K   (0 bytes)
MS-DOS is resident in the high memory area.

Windows 2000 and Windows XP example output:

655360 bytes total conventional memory
655360 bytes available to MS-DOS
633872 largest executable program size
1048576 bytes total contiguous extended memory
0 bytes available contiguous extended memory
941056 bytes available XMS memory MS-DOS resident in High Memory Area

mem /f

Display the amount of conventional memory free.

When using the mem /c command from a DOS window in Windows, no upper blocks are seen, as shown in the above example. In Windows 0 bytes are shown because Windows reserves all global upper memory blocks for Windows.

MS-DOS 6.2 and above does not accept or recognize more than 64 MB of ram when typing mem.