/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
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