/proc/self/status以下代码为Linux和其他系统提供了一个简单的解决方案，我在我的项目中使用了以下代码：

def memory_usage():
    """Memory usage of the current process in kilobytes."""
    status = None
    result = {'peak': 0, 'rss': 0}
    try:
        # This will only work on systems with a /proc file system
        # (like Linux).
        status = open('/proc/self/status')
        for line in status:
            parts = line.split()
            key = parts[0][2:-1].lower()
            if key in result:
                result[key] = int(parts[1])
    finally:
        if status is not None:
            status.close()
    return result

它返回当前和峰值驻留内存大小（这可能是人们在谈论应用程序使用多少RAM时的意思）。很容易扩展它以从/proc/self/status文件中获取其他信息。

出于好奇：的完整输出cat /proc/self/status如下所示：

% cat /proc/self/status
Name:   cat
State:  R (running)
Tgid:   4145
Pid:    4145
PPid:   4103
TracerPid:      0
Uid:    1000    1000    1000    1000
Gid:    1000    1000    1000    1000
FDSize: 32
Groups: 20 24 25 29 40 44 46 100 1000 
VmPeak:     3580 kB
VmSize:     3580 kB
VmLck:         0 kB
VmHWM:       472 kB
VmRSS:       472 kB
VmData:      160 kB
VmStk:        84 kB
VmExe:        44 kB
VmLib:      1496 kB
VmPTE:        16 kB
Threads:        1
SigQ:   0/16382
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000000000
SigCgt: 0000000000000000
CapInh: 0000000000000000
CapPrm: 0000000000000000
CapEff: 0000000000000000
CapBnd: ffffffffffffffff
Cpus_allowed:   03
Cpus_allowed_list:      0-1
Mems_allowed:   1
Mems_allowed_list:      0
voluntary_ctxt_switches:        0
nonvoluntary_ctxt_switches:     0