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查看cpu，内存使用率(二)

liunx 收藏
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纵论 纵论 2020-07-09 10:01:00
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三、Linux下查看哪些进程占用的CPU和内存资源最多的方法1、获取占用CPU资源最多的10个进程

 # ps aux | head -1; ps aux | grep -v PID | sort -rn -k +3 | head -10

[root@localhost ~]# ps aux | head -1; ps aux | grep -v PID | sort -rn -k +3 | head -10
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      9416  0.8  0.0 163544  6284 ?        Ss   08:38   0:00 sshd: root@pts/0
root      3783  0.7  0.0  12072  2032 ?        S    May26 357:27 /bin/bash /usr/local/VMOptimizationTools/sangfor_guest_datareport
root      9545  0.6  0.0 163224  5904 ?        Ss   08:38   0:00 sshd: root@notty
root      3966  0.3  0.0  12704  2676 ?        S    May26 183:12 /bin/bash /usr/local/VMOptimizationTools/sangfor_update_ipc_callback
root      3784  0.3  0.0  12560  2552 ?        S    May26 182:42 /bin/bash /usr/local/VMOptimizationTools/sangfor_sfping
33       10431  0.3  0.1 409704 17832 ?        S    08:38   0:00 /usr/sbin/apache2 -k start
root      3986  0.2  0.0  12452  2280 ?        S    May26 122:23 /bin/bash /usr/local/VMOptimizationTools/sangfor_vm_proxyd_w
root      3781  0.2  0.0  12740  2672 ?        S    May26 115:59 /bin/bash /usr/local/VMOptimizationTools/sangfor_vm_proxyd
500      23785  0.2  2.0 1790172 249528 ?      Ss   Jun25  11:30 oraclehelowin (LOCAL=NO)
root      4053  0.1  0.0  12508  2520 ?        S    May26  75:16 /bin/bash /usr/local/VMOptimizationTools/sangfor_watchdog
2、获取占用内存资源最多的10个进程

# ps aux | head -1; ps aux | grep -v PID | sort -rn -k +4 | head -10

[root@localhost ~]# ps aux | head -1; ps aux | grep -v PID | sort -rn -k +4 | head -10
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
500      32304  0.0  5.7 1794892 700976 ?      Ss   May31   2:53 ora_dbw0_helowin
500       4785  0.0  4.5 1797912 550132 ?      Ss   May29   4:03 ora_dbw0_helowin
500       4796  0.0  3.5 1798308 426468 ?      Ss   May29   2:11 ora_smon_helowin
500      25850  0.0  2.5 1810144 307340 ?      Ss   Jun17   0:10 oraclehelowin (LOCAL=NO)
500      32471  0.0  2.4 1810184 299704 ?      Ss   Jun14   0:30 oraclehelowin (LOCAL=NO)
500       3927  0.0  2.3 1791308 283440 ?      Ss   Jun26   0:13 oraclehelowin (LOCAL=NO)
500       5432  0.0  2.1 1794272 261692 ?      Ss   May29   7:16 ora_cjq0_helowin
500      23785  0.2  2.0 1790172 249528 ?      Ss   Jun25  11:30 oraclehelowin (LOCAL=NO)
500      19092  0.0  2.0 1793248 253080 ?      Ss   Jun21   0:28 oraclehelowin (LOCAL=NO)
500      32310  0.0  1.8 1794224 229200 ?      Ss   May31   1:25 ora_smon_helowin
3、查看占用cpu最高的进程

# ps aux | head -1; ps aux | grep -v PID | sort -rn -k +3 | head -1

[root@localhost ~]# ps aux | head -1; ps aux | grep -v PID | sort -rn -k +3 | head -1
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root      3783  0.7  0.0  12072  2032 ?        S    May26 357:32 /bin/bash /usr/local/VMOptimizationTools/sangfor_guest_datareport
4、获取占用内存资源最高的进程

# ps aux | head -1; ps aux | grep -v PID | sort -rn -k +4 | head -1

[root@localhost ~]# ps aux | head -1; ps aux | grep -v PID | sort -rn -k +4 | head -1
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
500      32304  0.0  5.7 1794892 700976 ?      Ss   May31   2:53 ora_dbw0_helowin
四、Linux下查看某些进程的启动时间和运行时长

比如查看java进程的启动时间和运行时长

# ps -ef|grep -v grep|grep -w java|awk '{print $2}'

# ps -eo pid,lstart,etime | grep 1973

其中：

Mon Jun 24 09:25:41 2019       为java进程的启动时间

4-00:16:55                     为java进程的运行时长，天-小时-分钟-秒

[root@localhost ~]# ps -ef|grep -v grep|grep -w java|awk '{print $2}'
1973
[root@localhost ~]#
[root@localhost ~]# ps -eo pid,lstart,etime | grep 1973
 1973 Mon Jun 24 09:25:41 2019  4-00:16:55
[root@localhost ~]#
[root@localhost ~]# date
Fri Jun 28 09:42:48 CST 2019
查看所有进程的启动事件、运行时长

# ps -eo user,pid,lstart,etime,cmd

查看nginx进程启动的精确时间和启动后运行的时长

# ps -eo pid,lstart,etime,cmd|grep nginx

[root@nginx-proxy-client ~]# ps -eo pid,lstart,etime,cmd|grep nginx
 1418 Mon Jun 24 13:38:18 2019  3-20:21:05 nginx: master process /usr/local/nginx/sbin/nginx
 1419 Mon Jun 24 13:38:18 2019  3-20:21:05 nginx: worker process
 5543 Fri Jun 28 09:59:23 2019       00:00 grep --color=auto nginx
[root@nginx-proxy-client ~]#
[root@nginx-proxy-client ~]# date
2019年 06月 28日 星期五 09:59:45 CST
[root@nginx-proxy-client ~]#
五、查看网络情况

# ifconfig

[root@localhost ~]# ifconfig 
eno16777736: flags=4163  mtu 1500
        inet 192.168.2.80  netmask 255.255.255.0  broadcast 192.168.2.255
        inet6 fe80::20c:29ff:fe4c:ff47  prefixlen 64  scopeid 0x20
        ether 00:0c:29:4c:ff:47  txqueuelen 1000  (Ethernet)
        RX packets 7866  bytes 632606 (617.7 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 215  bytes 31932 (31.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10
        loop  txqueuelen 0  (Local Loopback)
        RX packets 8  bytes 400 (400.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 8  bytes 400 (400.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

# ip a

[root@localhost ~]# ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eno16777736:  mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:4c:ff:47 brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.80/24 brd 192.168.2.255 scope global eno16777736
       valid_lft forever preferred_lft forever
    inet6 fe80::20c:29ff:fe4c:ff47/64 scope link 
       valid_lft forever preferred_lft forever
四、查看磁盘以及分区情况

# df -Th

查看分区、挂载情况

[root@localhost ~]# df -Th
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        15G  2.8G   13G  19% /
devtmpfs                devtmpfs  903M     0  903M   0% /dev
tmpfs                   tmpfs     913M     0  913M   0% /dev/shm
tmpfs                   tmpfs     913M  8.6M  904M   1% /run
tmpfs                   tmpfs     913M     0  913M   0% /sys/fs/cgroup
/dev/sda1               xfs       297M  115M  183M  39% /boot
tmpfs                   tmpfs     183M     0  183M   0% /run/user/0

# lsblk

查看磁盘情况

[root@localhost ~]# lsblk 
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0   20G  0 disk 
├─sda1            8:1    0  300M  0 part /boot
└─sda2            8:2    0   19G  0 part 
  ├─centos-root 253:0    0   15G  0 lvm  /
  └─centos-swap 253:1    0    4G  0 lvm  [SWAP]
sr0              11:0    1    4G  0 rom

# fdisk -l

查看详细的硬盘分区情况

[root@localhost ~]# fdisk -l

Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x0004a0a8

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      616447      307200   83  Linux
/dev/sda2          616448    40478719    19931136   8e  Linux LVM

Disk /dev/mapper/centos-root: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


Disk /dev/mapper/centos-swap: 4294 MB, 4294967296 bytes, 8388608 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes


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