LINUX查看进程占用内存大小

最新推荐文章于 2025-06-24 09:35:18 发布

孙海龙_1982

最新推荐文章于 2025-06-24 09:35:18 发布

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本文链接：https://blog.youkuaiyun.com/card_2005/article/details/7693185

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本文详细介绍了使用top、ps和/proc命令来检查Linux系统中进程的内存使用情况的方法，包括如何获取物理内存大小、查看特定进程的详细信息以及通过/proc目录进一步了解进程状态。

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如下三种方法比较靠谱

1.使用TOP查看：

top -d 1 -p 1128

top - 15:32:10 up 13 days, 20:32, 6 users, load average: 0.74, 0.87, 0.89
Tasks:   1 total,   0 running,   1 sleeping,   0 stopped,   0 zombie
Cpu(s): 0.4%us, 0.1%sy, 0.0%ni, 99.4%id, 0.0%wa, 0.0%hi, 0.1%si, 0.0%st
Mem: 132069028k total, 74525476k used, 57543552k free, 4405000k buffers
Swap: 65536228k total,        0k used, 65536228k free, 58109180k cached

PID USER      PR NI VIRT RES SHR S %CPU %MEM    TIME+ COMMAND
1128 oracle    15   0 86.7g 40m 37m S 0.0 0.0   0:00.03 oracle

RES对应的就是占用的物理内存大小

2.ps -e -o 'pid,comm,args,pcpu,rsz,vsz,stime,user,uid' | grep pid

ps -e -o 'pid,comm,args,pcpu,rsz,vsz,stime,user,uid' | grep 1128
1128 oracle          oraclebizdb1 (LOCAL=NO)      0.0 42296 90920168 14:55 oracle 1000
16183 init.ohasd      /bin/sh /etc/init.d/init.oh 0.0 1128 10792 Jun12 root         0
18986 oracle          oraclebizdb1 (LOCAL=NO)      0.0 1101128 90922300 Jun21 oracle 1000
21053 oracle          oraclebizdb1 (LOCAL=NO)      0.7 112820 90921192 15:58 oracle 1000

查看所有进程使用大小

ps -e -o 'pid,comm,args,pcpu,rsz,vsz,stime,user,uid' | grep oracle | sort -nrk5

3.查看/proc/pid/status

cat /proc/1128/status
Name:   oracle
State: S (sleeping)
SleepAVG:       98%
Tgid:   1128
Pid:    1128
PPid:   1
TracerPid:      0
Uid:    1000    1000    1000    1000
Gid:    1000    1000    1000    1000
FDSize: 64
Groups: 1000 1001
VmPeak: 90920168 kB
VmSize: 90920168 kB
VmLck:         0 kB
VmHWM:     41448 kB
VmRSS:     41448 kB                                 # 41448/1024=40M
VmData:     3184 kB
VmStk:        84 kB
VmExe:    155144 kB
VmLib:     12228 kB
VmPTE:      3984 kB
StaBrk: 1c210000 kB
Brk:    1c2b7000 kB
StaStk: 7fffcc7087b0 kB
Threads:        1
SigQ:   9/1064960
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000010000
SigIgn: 0000000006005207
SigCgt: 00000001c9c02cf8
CapInh: 0000000000000000
CapPrm: 0000000000000000
CapEff: 0000000000000000
Cpus_allowed:   00000000,00000000,00000000,00000000,00000000,0000ffff,ffffffff,ffffffff
Mems_allowed:   00000000,0000000f