Linux下查看某個進程佔用的CPU及內存

目錄

1.查看指定進程的PID

2.用top命令指定固定的PID

3.使用ps查詢指定進程名或PID的佔用情況

4.查看更詳細的內存佔比

---

1.查看指定進程的PID

ps -ef | grep iquota-server

2.用top命令指定固定的PID

top -p 3664

3.使用ps查詢指定進程名或PID的佔用情況

ps -aux | grep iquota-server

或：263539008

ps -aux | grep 3664

其中，

3664爲PID

4.3爲CPU佔用百分比（注意：如果有兩個CPU，32核64線程，那麼總佔比是6400%）

2.9爲內存佔用百分比，7848800爲該進程使用內存(kb)，總的內存可以使用top命令查看，如下：

4.查看更詳細的內存佔比

cat /proc/3664/status

返回結果：（其中VmRSS爲進程所佔用的內存）

Name:   java
Umask:  0022
State:  S (sleeping)
Tgid:   24852
Ngid:   0
Pid:    24852
PPid:   1
TracerPid:      0
Uid:    0       0       0       0
Gid:    0       0       0       0
FDSize: 512
Groups: 0 
NStgid: 24852
NSpid:  24852
NSpgid: 24720
NSsid:  24720
VmPeak: 22110836 kB
VmSize: 22032508 kB
VmLck:         0 kB
VmPin:         0 kB
VmHWM:   9972672 kB
VmRSS:   9968432 kB
RssAnon:         9947648 kB
RssFile:           20784 kB
RssShmem:              0 kB
VmData: 11418068 kB
VmStk:       140 kB
VmExe:         4 kB
VmLib:     16120 kB
VmPTE:     20780 kB
VmPMD:        96 kB
VmSwap:        0 kB
HugetlbPages:          0 kB
Threads:        96
SigQ:   3/767318
SigPnd: 0000000000000000
ShdPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000000003
SigCgt: 2000000181005ccc
CapInh: 0000000000000000
CapPrm: 0000003fffffffff
CapEff: 0000003fffffffff
CapBnd: 0000003fffffffff
CapAmb: 0000000000000000
NoNewPrivs:     0
Seccomp:        0
Speculation_Store_Bypass:       vulnerable
Cpus_allowed:   ffffff,ffffffff
Cpus_allowed_list:      0-55
Mems_allowed:   00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000003
Mems_allowed_list:      0-1
voluntary_ctxt_switches:        1
nonvoluntary_ctxt_switches:     1

參考：https://www.cnblogs.com/EasonJim/p/8040782.html