Linux（centos7）上如何查看内存、CPU以及硬盘的使用情况
文章目录
- 查看内存使用情况
- 查看CPU
- 查看硬盘使用情况
查看内存使用情况
命令：top
[root@centos mysdb]# top
top - 10:00:28 up 4:47, 2 users, load average: 0.00, 0.01, 0.05
Tasks: 130 total, 2 running, 126 sleeping, 2 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.2 sy, 0.0 ni, 99.8 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 1863088 total, 1430004 free, 144384 used, 288700 buff/cache
KiB Swap: 6160376 total, 6160376 free, 0 used. 1518976 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 193760 6816 4152 S 0.0 0.4 0:03.57 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:00.02 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 0:15.32 kworker/0:0
4 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/0:0H
5 root 20 0 0 0 0 S 0.0 0.0 0:00.43 kworker/u256:0
6 root 20 0 0 0 0 S 0.0 0.0 0:00.18 ksoftirqd/0
7 root rt 0 0 0 0 S 0.0 0.0 0:00.04 migration/0
8 root 20 0 0 0 0 S 0.0 0.0 0:00.00 rcu_bh
9 root 20 0 0 0 0 S 0.0 0.0 0:03.83 rcu_sched
10 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 lru-add-drain
11 root rt 0 0 0 0 S 0.0 0.0 0:00.07 watchdog/0
12 root rt 0 0 0 0 S 0.0 0.0 0:00.06 watchdog/1
13 root rt 0 0 0 0 S 0.0 0.0 0:00.04 migration/1
14 root 20 0 0 0 0 S 0.0 0.0 0:00.15 ksoftirqd/1
16 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kworker/1:0H
18 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kdevtmpfs
19 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 netns
20 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khungtaskd
21 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 writeback
22 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kintegrityd
23 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
24 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
25 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 bioset
26 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 kblockd
27 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 md
28 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 edac-poller
29 root 0 -20 0 0 0 S 0.0 0.0 0:00.00 watchdogd
35 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kswapd0
| 字段 | 含义 |
|---|---|
| PID | 进程id |
| USER | 进程所有者 |
| PR | 进程优先级 |
| NI | nice值。负值表示高优先级，正值表示低优先级 |
| VIRT | 进程使用的虚拟内存总量，单位kb。VIRT=SWAP+RES |
| RES | 进程使用的、未被换出的物理内存大小，单位kb。RES=CODE+DATA |
| SHR | 共享内存大小，单位kb |
| S | 进程状态。D=不可中断的睡眠状态 R=运行 S=睡眠 T=跟踪/停止 Z=僵尸进程 |
| %CPU | 上次更新到现在的CPU时间占用百分比 |
| %MEM | 进程使用的物理内存百分比 |
| TIME+ | 进程使用的CPU时间总计，单位1/100秒 |
| COMMAND | 进程名称（命令名/命令行） |
查看CPU
命令：cat /proc/cpuinfo
[root@centos ~]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
stepping : 9
microcode : 0x8e
cpu MHz : 2712.002
cache size : 3072 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 22
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch epb invpcid_single ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx smap xsaveopt dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
bogomips : 5424.00
clflush size : 64
cache_alignment : 64
address sizes : 42 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
stepping : 9
microcode : 0x8e
cpu MHz : 2712.002
cache size : 3072 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2 #CPU的核心数
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 22
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch epb invpcid_single ibrs ibpb stibp fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid rdseed adx smap xsaveopt dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
bogomips : 5424.00
clflush size : 64
cache_alignment : 64
address sizes : 42 bits physical, 48 bits virtual
power management:
lscpu
[root@centos ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 142
Model name: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
Stepping: 9
CPU MHz: 2712.002
BogoMIPS: 5424.00
Hypervisor vendor: VMware
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 3072K
NUMA node0 CPU(s): 0,1
[root@centos ~]# cat /proc/cpuinfo| grep "physical id"|uniq| wc -l
1
[root@centos ~]# cat /proc/cpuinfo| grep "cpu cores"| uniq
cpu cores : 2
[root@centos ~]# cat /proc/cpuinfo| grep "processor"| wc -l
2
| physical id | 物理CPU数 |
|---|---|
| cpu cores | cpu核数 |
| processor | 逻辑CPU数 |
查看硬盘使用情况
命令：df -h
[root@centos ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 46G 4.5G 42G 10% /
devtmpfs 893M 0 893M 0% /dev
tmpfs 910M 0 910M 0% /dev/shm
tmpfs 910M 9.1M 901M 1% /run
tmpfs 910M 0 910M 0% /sys/fs/cgroup
/dev/sda1 497M 182M 315M 37% /boot
tmpfs 182M 0 182M 0% /run/user/0
| 字段 | 解释 |
|---|---|
| Filesystem | 文件系统 |
| Size | 大小 |
| Used | 已用 |
| Avail | 可用 |
| Use% | 已用% |
| Mounted on | 挂载点 |