top命令可以查看进程内存的使用，但是不够详细。还有一些命令可以进行更加详细的查看。

[root@localhost ~]# cat /proc/5606/status

Name: switch4

State: S (sleeping)

Tgid: 5606

Pid: 5606

PPid: 1

TracerPid: 0

Uid: 0 0 0 0

Gid: 0 0 0 0

Utrace: 0

FDSize: 32

Groups: 0 1 2 3 4 6 10

VmPeak: 85328 kB

VmSize: 84308 kB——进程占用的虚拟内存大小。

VmLck: 0 kB

VmHWM: 46368 kB

VmRSS: 46360 kB——占用的物理内存。

VmData: 76512 kB——data段内存大小（BSS，data）

VmStk: 88 kB——栈大小。

VmExe: 312 kB——代码段大小。

VmLib: 6868 kB——库大小

VmPTE: 148 kB

VmSwap: 0 kB

Threads: 4

SigQ: 1/31237

SigPnd: 0000000000000000

ShdPnd: 0000000000000000

SigBlk: 0000000000000000

SigIgn: 0000000000000005

SigCgt: 0000000180005202

CapInh: 0000000000000000

CapPrm: ffffffffffffffff

CapEff: ffffffffffffffff

CapBnd: ffffffffffffffff

Cpus_allowed: ff

Cpus_allowed_list: 0-7

Mems_allowed: 1

Mems_allowed_list: 0

voluntary_ctxt_switches: 116683469

nonvoluntary_ctxt_switches: 301173

[root@localhost ~]# cat /proc/5627/smaps

00110000-00112000 r-xp 00000000 08:02 652817 /home/mic_lib_2012-04-21-03-16-32/libdb.so

Size: 8 kB

Rss: 8 kB

Pss: 1 kB

Shared_Clean: 8 kB

Shared_Dirty: 0 kB

Private_Clean: 0 kB

Private_Dirty: 0 kB

Referenced: 8 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB

00112000-00113000 rw-p 00001000 08:02 652817 /home/mic_lib_2012-04-21-03-16-32/libdb.so

Size: 4 kB

Rss: 4 kB

Pss: 4 kB

Shared_Clean: 0 kB

Shared_Dirty: 0 kB

Private_Clean: 0 kB

Private_Dirty: 4 kB

Referenced: 4 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB

08048000-080a2000 r-xp 00000000 08:02 1044485 /home/execute_2012-04-21-03-16-32/mrfc

Size: 360 kB——虚拟内存

Rss: 156 kB——物理内存

Pss: 156 kB

Shared_Clean: 0 kB——共享部分，动态链接库

Shared_Dirty: 0 kB

Private_Clean: 156 kB——私有部分。

Private_Dirty: 0 kB

Referenced: 156 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB

09f43000-09f87000 rw-p 00000000 00:00 0 [heap]——堆的内存

Size: 272 kB

Rss: 184 kB

Pss: 184 kB

Shared_Clean: 0 kB

Shared_Dirty: 0 kB

Private_Clean: 0 kB

Private_Dirty: 184 kB

Referenced: 184 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB

b6cfc000-b6cfd000 ---p 00000000 00:00 0

Size: 4 kB

Rss: 0 kB

Pss: 0 kB

Shared_Clean: 0 kB

Shared_Dirty: 0 kB

Private_Clean: 0 kB

Private_Dirty: 0 kB

Referenced: 0 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB

b6cfd000-b7703000 rw-p 00000000 00:00 0

Size: 10264 kB

Rss: 28 kB

Pss: 28 kB

Shared_Clean: 0 kB

Shared_Dirty: 0 kB

Private_Clean: 0 kB

Private_Dirty: 28 kB

Referenced: 28 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB

b7714000-b7716000 rw-p 00000000 00:00 0

Size: 8 kB

Rss: 8 kB

Pss: 8 kB

Shared_Clean: 0 kB

Shared_Dirty: 0 kB

Private_Clean: 0 kB

Private_Dirty: 8 kB

Referenced: 8 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB

bfed4000-bfee9000 rw-p 00000000 00:00 0 [stack]——栈的内存。

Size: 88 kB

Rss: 44 kB

Pss: 44 kB

Shared_Clean: 0 kB

Shared_Dirty: 0 kB

Private_Clean: 0 kB

Private_Dirty: 44 kB

Referenced: 44 kB

Swap: 0 kB

KernelPageSize: 4 kB

MMUPageSize: 4 kB