Linux系统卡慢之调优方法
2024-05-05 17:41:51
Linux系统卡慢之调优方法
- 一、查看当前系统装态
- 二、对系统各进程排序
- 三、分析进程状态
- 四、测试系统状态
一、查看当前系统装态
二、对系统各进程排序
三、分析进程状态
四、测试系统状态
一、查看当前系统装态
1.查看当前进场状态，系统负载过高，系统相当卡慢
top - 23:08:47 up 11:01, 1 user, load average: 925.72, 927.01, 917.04
Tasks: 3418 total, 1046 running, 2372 sleeping, 0 stopped, 0 zombie
%Cpu(s): 35.5 us, 63.1 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.6 hi, 0.9 si, 0.0 st
MiB Mem : 3918.5 total, 476.1 free, 2900.9 used, 541.5 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 728.1 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
119640 root 20 0 69460 10468 4152 R 0.7 0.3 0:04.92 top 10 root 20 0 0 0 0 R 0.4 0.0 1:34.59 rcu_sched 1244 mysql 20 0 1357880 397984 31000 S 0.2 9.9 1:11.76 mysqld 1506 apache 20 0 1343960 11600 6384 S 0.2 0.3 0:05.48 httpd 3043 root 20 0 12832 3168 2848 S 0.2 0.1 0:01.96 log.sh 3402 root 20 0 12832 3232 2908 S 0.2 0.1 0:01.68 log.sh 3859 root 20 0 12832 3252 2924 S 0.2 0.1 0:03.43 log.sh 7872 root 20 0 12832 3232 2912 S 0.2 0.1 0:03.72 log.sh 10920 root 20 0 12832 3256 2932 S 0.2 0.1 0:08.76 log.sh 16900 root 20 0 12832 3260 2940 S 0.2 0.1 0:01.77 log.sh 28647 root 20 0 12832 3208 2884 S 0.2 0.1 0:01.27 log.sh 29094 root 20 0 12832 3164 2840 S 0.2 0.1 0:00.58 log.sh 34566 root 20 0 12832 3252 2932 S 0.2 0.1 0:01.88 log.sh 36878 root 20 0 12832 3172 2848 S 0.2 0.1 0:03.52 log.sh 38955 root 20 0 12832 3204 2876 S 0.2 0.1 0:02.67 log.sh 40783 root 20 0 0 0 0 I 0.2 0.0 0:00.76 kworker/0:2-events 41112 root 20 0 12832 3164 2840 S 0.2 0.1 0:01.57 log.sh 41605 root 20 0 12832 3272 2948 S 0.2 0.1 0:01.26 log.sh 41856 root 20 0 12832 3264 2940 S 0.2 0.1 0:06.64 log.sh 42967 root 20 0 12832 3124 2796 S 0.2 0.1 0:00.47 log.sh 43692 root 20 0 12832 3236 2908 S 0.2 0.1 0:09.47 log.sh 44485 root 20 0 12832 3220 2892 S 0.2 0.1 0:10.31 log.sh 57271 root 20 0 12832 3268 2940 S 0.2 0.1 0:06.53 log.sh 60624 root 20 0 12832 3168 2848 S 0.2 0.1 0:03.01 log.sh 64120 root 20 0 12832 3324 3000 S 0.2 0.1 0:04.11 log.sh 68358 root 20 0 12832 3296 2972 S 0.2 0.1 0:01.30 log.sh 68491 root 20 0 12832 3172 2848 S 0.2 0.1 0:02.51 log.sh 72158 root 20 0 12832 3192 2872 S 0.2 0.1 0:01.18 log.sh 75374 root 20 0 12832 3332 3008 S 0.2 0.1 0:09.26 log.sh 78726 root 20 0 12832 3196 2876 S 0.2 0.1 0:01.96 log.sh 85466 root 20 0 12832 3228 2900 S 0.2 0.1 0:04.82 log.sh 91415 root 20 0 12832 3268 2940 S 0.2 0.1 0:03.14 log.sh 97916 root 20 0 12832 3228 2904 S 0.2 0.1 0:00.88 log.sh 98944 root 20 0 12832 3172 2844 S 0.2 0.1 0:03.37 log.sh
107246 root 20 0 12832 3228 2900 S 0.2 0.1 0:03.63 log.sh
108035 root 20 0 12832 3228 2904 S 0.2 0.1 0:05.34 log.sh
116940 root 20 0 12832 3212 2892 S 0.2 0.1 0:04.01 log.sh
117082 root 20 0 12832 3236 2912 S 0.2 0.1 0:03.63 log.sh
122689 root 20 0 12832 3220 2896 S 0.2 0.1 0:12.25 log.sh
123703 root 20 0 12832 3252 2928 S 0.2 0.1 0:03.88 log.sh 1 root 20 0 197248 15648 9004 S 0.0 0.4 0:05.68 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.03 kthreadd
[root@control scripts]# free -mtotal used free shared buff/cache available
Mem: 3918 2920 456 15 541 708
Swap: 2047
二、对系统各进程排序
1.对cpu占有率进行降序排列
[root@control scripts]#
[root@control scripts]# ps aux --sort=-%cpu |head -n 20
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 35004 1.0 0.1 58044 5104 pts/0 R+ 23:30 0:00 ps aux --sort=-%cpu
root 121033 0.3 0.0 0 0 ? I 23:30 0:00 [kworker/0:3-events]
root 10 0.2 0.0 0 0 ? I 12:07 1:37 [rcu_sched]
root 48011 0.2 0.0 0 0 ? I 23:26 0:00 [kworker/0:0-cgroup_pidlist_destroy]
mysql 1244 0.1 9.9 1357880 397984 ? Ssl 12:07 1:14 /usr/libexec/mysqld --basedir=/usr
root 72606 0.1 0.0 0 0 ? I 23:20 0:00 [kworker/0:1-xfs-cil/nvme0n1p5]
root 1 0.0 0.3 197248 15652 ? Ss 12:07 0:05 /usr/lib/systemd/systemd --switched-root --system --deserialize 18
root 2 0.0 0.0 0 0 ? S 12:07 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? I< 12:07 0:00 [rcu_gp]
root 4 0.0 0.0 0 0 ? I< 12:07 0:00 [rcu_par_gp]
root 6 0.0 0.0 0 0 ? I< 12:07 0:00 [kworker/0:0H-kblockd]
root 8 0.0 0.0 0 0 ? I< 12:07 0:00 [mm_percpu_wq]
root 9 0.0 0.0 0 0 ? S 12:07 0:11 [ksoftirqd/0]
root 11 0.0 0.0 0 0 ? S 12:07 0:00 [migration/0]
root 12 0.0 0.0 0 0 ? S 12:07 0:00 [watchdog/0]
root 13 0.0 0.0 0 0 ? S 12:07 0:00 [cpuhp/0]
root 15 0.0 0.0 0 0 ? S 12:07 0:00 [kdevtmpfs]
root 16 0.0 0.0 0 0 ? I< 12:07 0:00 [netns]
root 17 0.0 0.0 0 0 ? S 12:07 0:00 [kauditd]2.对内存占有大小进行降序排列
[root@control scripts]# ps aux --sort=-%mem |head -n 20
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
mysql 1244 0.1 9.9 1357880 397984 ? Ssl 12:07 1:14 /usr/libexec/mysqld --basedir=/usr
gdm 1955 0.0 3.5 2843996 141372 tty1 Sl+ 12:07 0:14 /usr/bin/gnome-shell
gdm 2042 0.0 1.3 259244 52788 tty1 S+ 12:07 0:00 /usr/bin/Xwayland :1024 -rootless -terminate -accessx -core -listen 4 -listen 5 -displayfd 6
gdm 2117 0.0 1.3 1240264 52700 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-media-keys
gdm 2125 0.0 1.2 745352 51832 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-power
gdm 2109 0.0 1.2 809320 51508 tty1 Sl+ 12:07 0:03 /usr/libexec/gsd-color
gdm 2094 0.0 1.2 646964 51092 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-xsettings
gdm 2146 0.0 1.2 581116 50628 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-wacom
gdm 2115 0.0 1.2 645832 50520 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-keyboard
gdm 2103 0.0 1.2 496092 50064 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-clipboard
gdm 2071 0.0 1.2 496540 50048 tty1 Sl 12:07 0:00 /usr/libexec/ibus-x11 --kill-daemon
root 986 0.0 1.0 1167316 41504 ? Ssl 12:07 0:00 /usr/sbin/libvirtd
root 883 0.0 0.8 202764 35484 ? S 12:07 0:00 /usr/libexec/sssd/sssd_nss --uid 0 --gid 0 --logger=files
root 909 0.0 0.8 252904 35064 ? Ssl 12:07 0:00 /usr/libexec/platform-python -s /usr/sbin/firewalld --nofork --nopid
root 976 0.0 0.7 401624 30708 ? Ssl 12:07 0:03 /usr/libexec/platform-python -Es /usr/sbin/tuned -l -P
polkitd 796 0.0 0.6 1780272 26932 ? Ssl 12:07 0:17 /usr/lib/polkit-1/polkitd --no-debug
root 948 0.0 0.4 407028 18992 ? Ssl 12:07 0:00 /usr/sbin/NetworkManager --no-daemon
root 1463 0.0 0.4 377288 18600 ? Ssl 12:07 0:01 /usr/sbin/rsyslogd -n
root 630 0.0 0.4 93740 16316 ? Ss 12:07 0:02 /usr/lib/systemd/systemd-journald3.对top内存进行排序
top - 23:33:59 up 11:26, 1 user, load average: 970.20, 946.03, 935.18
Tasks: 3753 total, 1442 running, 2311 sleeping, 0 stopped, 0 zombie
%Cpu(s): 34.5 us, 64.2 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.5 hi, 0.8 si, 0.0 st
MiB Mem : 3918.5 total, 414.7 free, 2962.2 used, 541.7 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 666.9 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1244 mysql 20 0 1357880 397984 31000 S 0.3 9.9 1:14.84 mysqld 1955 gdm 20 0 2843996 141372 83436 S 0.0 3.5 0:14.18 gnome-shell 2042 gdm 20 0 259244 52788 36968 S 0.0 1.3 0:00.27 Xwayland 2117 gdm 20 0 1240264 52700 41848 S 0.0 1.3 0:00.21 gsd-media-keys 2125 gdm 20 0 745352 51832 41280 S 0.0 1.3 0:00.22 gsd-power 2109 gdm 20 0 809320 51508 40704 S 0.0 1.3 0:03.53 gsd-color 2094 gdm 20 0 646964 51092 40404 S 0.0 1.3 0:00.12 gsd-xsettings 2146 gdm 20 0 581116 50628 39968 S 0.0 1.3 0:00.12 gsd-wacom 2115 gdm 20 0 645832 50520 40268 S 0.0 1.3 0:00.12 gsd-keyboard 2103 gdm 20 0 496092 50064 39860 S 0.0 1.2 0:00.11 gsd-clipboard 2071 gdm 20 0 496540 50048 39896 S 0.0 1.2 0:00.09 ibus-x11 986 root 20 0 1167316 41504 30084 S 0.0 1.0 0:00.47 libvirtd 883 root 20 0 202764 35484 34132 S 0.0 0.9 0:00.85 sssd_nss 909 root 20 0 252904 35064 14704 S 0.0 0.9 0:00.65 firewalld 976 root 20 0 401624 30708 14352 S 0.0 0.8 0:03.27 tuned 796 polkitd 20 0 1780272 26932 16804 S 0.0 0.7 0:17.74 polkitd 948 root 20 0 407028 18992 15840 S 0.0 0.5 0:00.68 NetworkManager 1463 root 20 0 377288 18600 9692 S 0.0 0.5 0:01.53 rsyslogd 630 root 20 0 93740 16316 12884 S 0.0 0.4 0:02.09 systemd-journal 1 root 20 0 197248 15652 9004 S 0.0 0.4 0:05.75 systemd 2273 root 9 -11 382676 14532 8916 S 0.0 0.4 0:00.55 pulseaudio 667 root 20 0 120404 14484 8384 S 0.0 0.4 0:00.58 systemd-udevd 1926 gdm 20 0 561288 14204 11996 S 0.0 0.4 0:00.22 gnome-session-b 1503 apache 20 0 1475088 13648 6384 S 0.0 0.3 0:06.50 httpd 2111 gdm 20 0 360724 13476 11644 S 0.0 0.3 0:00.01 gsd-datetime 882 root 20 0 191820 12708 9996 S 0.0 0.3 0:00.23 sssd_be 2140 gdm 20 0 457052 12656 9028 S 0.0 0.3 0:01.10 gsd-smartcard 795 root 20 0 226576 12520 10948 S 0.0 0.3 0:17.73 vmtoolsd 811 root 20 0 533576 12152 10168 S 0.0 0.3 0:00.18 udisksd 1504 apache 20 0 1343960 11600 6384 S 0.0 0.3 0:05.80 httpd 1506 apache 20 0 1343960 11600 6384 S 0.0 0.3 0:05.70 httpd 1375 gdm 20 0 1139416 11464 8480 S 0.0 0.3 0:00.14 pulseaudio
4.对top的cpu进行排序
top - 23:35:11 up 11:28, 1 user, load average: 925.18, 937.49, 933.01
Tasks: 3350 total, 1213 running, 2137 sleeping, 0 stopped, 0 zombie
%Cpu(s): 35.2 us, 63.5 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.4 hi, 0.9 si, 0.0 st
MiB Mem : 3918.5 total, 500.3 free, 2876.1 used, 542.1 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 752.7 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 40859 root 20 0 68624 9492 4124 R 0.9 0.2 0:00.89 top 1244 mysql 20 0 1357880 397984 31000 S 0.4 9.9 1:14.99 mysqld
121033 root 20 0 0 0 0 I 0.4 0.0 0:00.93 kworker/0:3-events 10 root 20 0 0 0 0 R 0.2 0.0 1:38.46 rcu_sched 2901 root 20 0 12832 3212 2892 S 0.2 0.1 0:06.89 log.sh 11316 root 20 0 12832 3252 2932 S 0.2 0.1 0:04.92 log.sh 11338 root 20 0 12832 3188 2864 S 0.2 0.1 0:00.42 log.sh 11588 root 20 0 12832 3344 3016 S 0.2 0.1 0:09.57 log.sh 18141 root 20 0 12832 3232 2908 S 0.2 0.1 0:02.09 log.sh 19853 root 20 0 12832 3184 2860 S 0.2 0.1 0:01.83 log.sh 22687 root 20 0 12832 3248 2924 S 0.2 0.1 0:13.91 log.sh 25858 root 20 0 12832 3316 2988 S 0.2 0.1 0:00.65 log.sh 26270 root 20 0 12832 3316 2996 S 0.2 0.1 0:03.01 log.sh 28339 root 20 0 12832 3264 2940 S 0.2 0.1 0:05.26 log.sh 32276 root 20 0 12832 3272 2952 S 0.2 0.1 0:01.92 log.sh 37834 root 20 0 12832 3332 3012 S 0.2 0.1 0:04.11 log.sh 40221 root 20 0 12832 3208 2888 S 0.2 0.1 0:03.18 log.sh 53572 root 20 0 12832 3264 2936 S 0.2 0.1 0:01.10 log.sh 62329 root 20 0 12832 3112 2788 S 0.2 0.1 0:03.67 log.sh 68358 root 20 0 12832 3296 2972 S 0.2 0.1 0:01.46 log.sh 72045 root 20 0 12832 3100 2776 S 0.2 0.1 0:10.57 log.sh 75636 root 20 0 12832 3168 2840 S 0.2 0.1 0:03.24 log.sh 75933 root 20 0 12832 3264 2940 S 0.2 0.1 0:00.46 log.sh 78521 root 20 0 12832 3268 2944 S 0.2 0.1 0:03.96 log.sh 83423 root 20 0 12832 3248 2924 S 0.2 0.1 0:01.05 log.sh 86644 root 20 0 12832 3148 2824 S 0.2 0.1 0:02.52 log.sh 89434 root 20 0 12832 3168 2840 S 0.2 0.1 0:00.44 log.sh 94082 root 20 0 12832 3264 2940 S 0.2 0.1 0:00.61 log.sh 99308 root 20 0 12832 3156 2832 S 0.2 0.1 0:05.37 log.sh
101858 root 20 0 12832 3176 2848 S 0.2 0.1 0:11.43 log.sh
107071 root 20 0 12832 3160 2836 S 0.2 0.1 0:01.44 log.sh
107192 root 20 0 12832 3260 2940 S 0.2 0.1 0:01.06 log.sh
108720 root 20 0 12832 3180 2848 S 0.2 0.1 0:09.35 log.sh
109394 root 20 0 12832 3212 2880 S 0.2 0.1 0:09.07 log.sh
117366 root 20 0 12832 3256 2936 S 0.2 0.1 0:00.34 log.sh
122689 root 20 0 12832 3220 2896 S 0.2 0.1 0:12.39 log.sh
127515 root 20 0 12832 3180 2856 S 0.2 0.1 0:03.92 log.sh
127665 root 20 0 12832 3240 2912 S 0.2 0.1 0:07.83 log.sh
130999 root 20 0 12832 3212 2888 S 0.2 0.1 0:01.11 log.sh 1 root 20 0 197248 15652 9004 S 0.0 0.4 0:05.75 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.03 kthreadd 3 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_gp
三、分析进程状态
经上述操作分析，发现内存及cpu资源负载过高原因有两个，
1.MYSQL数据库占有一定资源。
2.log.sh脚本重复运行，占有大量资源。
四、处理方法
1.kill所有的log.sh进程
ps -ef | grep log.sh |grep -v grep | awk '{print $2}' | xargs kill -152.停止mysql服务器
[root@control scripts]# systemctl stop mysqld.service
[root@control scripts]# systemctl status mysqld.service
● mysqld.service - MySQL 8.0 database serverLoaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)Active: inactive (dead) since Thu 2021-04-29 23:50:12 CST; 10s agoProcess: 87312 ExecStopPost=/usr/libexec/mysql-wait-stop (code=exited, status=0/SUCCESS)Process: 2015 ExecStartPost=/usr/libexec/mysql-check-upgrade (code=exited, status=0/SUCCESS)Process: 1244 ExecStart=/usr/libexec/mysqld --basedir=/usr (code=exited, status=0/SUCCESS)Process: 1110 ExecStartPre=/usr/libexec/mysql-prepare-db-dir mysqld.service (code=exited, status=0/SUCCESS)Process: 995 ExecStartPre=/usr/libexec/mysql-check-socket (code=exited, status=0/SUCCESS)Main PID: 1244 (code=exited, status=0/SUCCESS)3.查看当前系统状态
top - 23:51:03 up 11:44, 1 user, load average: 0.23, 175.83, 544.20
Tasks: 267 total, 1 running, 266 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.7 sy, 0.0 ni, 99.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 3918.5 total, 2592.0 free, 885.3 used, 441.3 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 2791.3 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1015 root 20 0 36092 3696 2796 S 0.3 0.1 0:00.51 crond 87359 root 20 0 64016 4988 4072 R 0.3 0.1 0:00.02 top 1 root 20 0 197248 15656 9004 S 0.0 0.4 0:06.34 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.03 kthreadd 3 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_gp 4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_par_gp 6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker/0:0H-kblockd 8 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 mm_percpu_wq 9 root 20 0 0 0 0 S 0.0 0.0 0:12.46 ksoftirqd/0 10 root 20 0 0 0 0 I 0.0 0.0 1:39.59 rcu_sched 11 root rt 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 12 root rt 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0 13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 cpuhp/0 15 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kdevtmpfs 16 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 netns 17 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kauditd 18 root 20 0 0 0 0 S 0.0 0.0 0:00.12 khungtaskd 19 root 20 0 0 0 0 S 0.0 0.0 0:00.00 oom_reaper 20 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 writeback 21 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kcompactd0 22 root 25 5 0 0 0 S 0.0 0.0 0:00.00 ksmd 23 root 39 19 0 0 0 S 0.0 0.0 0:02.19 khugepaged 24 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 crypto 25 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kintegrityd 26 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kblockd 27 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 md 28 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 edac-poller 29 root rt 0 0 0 0 S 0.0 0.0 0:00.00 watchdogd 44 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kswapd0 95 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kthrotld 96 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/24-pciehp 97 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/25-pciehp 98 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/26-pciehp 99 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/27-pciehp 100 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/28-pciehp 101 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/29-pciehp 102 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/30-pciehp 103 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/31-pciehp 104 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/32-pciehp 105 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/33-pciehp 106 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/34-pciehp 107 root -51 0 0 0 0 S 0.0 0.0 0:00.00 irq/35-pciehp
四、测试系统状态
1.查看CPU和内存状态
[root@control scripts]# ps aux --sort=-%cpu |head -n 20
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 10 0.2 0.0 0 0 ? I 12:07 1:39 [rcu_sched]
root 1 0.0 0.3 197248 15656 ? Ss 12:07 0:06 /usr/lib/systemd/systemd --switched-root --system --deserialize 18
root 2 0.0 0.0 0 0 ? S 12:07 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? I< 12:07 0:00 [rcu_gp]
root 4 0.0 0.0 0 0 ? I< 12:07 0:00 [rcu_par_gp]
root 6 0.0 0.0 0 0 ? I< 12:07 0:00 [kworker/0:0H-kblockd]
root 8 0.0 0.0 0 0 ? I< 12:07 0:00 [mm_percpu_wq]
root 9 0.0 0.0 0 0 ? S 12:07 0:12 [ksoftirqd/0]
root 11 0.0 0.0 0 0 ? S 12:07 0:00 [migration/0]
root 12 0.0 0.0 0 0 ? S 12:07 0:00 [watchdog/0]
root 13 0.0 0.0 0 0 ? S 12:07 0:00 [cpuhp/0]
root 15 0.0 0.0 0 0 ? S 12:07 0:00 [kdevtmpfs]
root 16 0.0 0.0 0 0 ? I< 12:07 0:00 [netns]
root 17 0.0 0.0 0 0 ? S 12:07 0:00 [kauditd]
root 18 0.0 0.0 0 0 ? S 12:07 0:00 [khungtaskd]
root 19 0.0 0.0 0 0 ? S 12:07 0:00 [oom_reaper]
root 20 0.0 0.0 0 0 ? I< 12:07 0:00 [writeback]
root 21 0.0 0.0 0 0 ? S 12:07 0:00 [kcompactd0]
root 22 0.0 0.0 0 0 ? SN 12:07 0:00 [ksmd]
[root@control scripts]# ps aux --sort=-%mem |head -n 20
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
gdm 1955 0.0 3.5 2843996 141424 tty1 Sl+ 12:07 0:16 /usr/bin/gnome-shell
gdm 2042 0.0 1.3 259244 52788 tty1 S+ 12:07 0:00 /usr/bin/Xwayland :1024 -rootless -terminate -accessx -core -listen 4 -listen 5 -displayfd 6
gdm 2117 0.0 1.3 1240264 52700 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-media-keys
gdm 2125 0.0 1.2 745352 51832 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-power
gdm 2109 0.0 1.2 809320 51508 tty1 Sl+ 12:07 0:03 /usr/libexec/gsd-color
gdm 2094 0.0 1.2 646964 51092 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-xsettings
gdm 2146 0.0 1.2 581116 50628 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-wacom
gdm 2115 0.0 1.2 645832 50520 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-keyboard
gdm 2103 0.0 1.2 496092 50064 tty1 Sl+ 12:07 0:00 /usr/libexec/gsd-clipboard
gdm 2071 0.0 1.2 496540 50048 tty1 Sl 12:07 0:00 /usr/libexec/ibus-x11 --kill-daemon
root 986 0.0 1.0 1167316 41504 ? Ssl 12:07 0:00 /usr/sbin/libvirtd
root 883 0.0 0.8 202764 35484 ? S 12:07 0:00 /usr/libexec/sssd/sssd_nss --uid 0 --gid 0 --logger=files
root 909 0.0 0.8 252904 35064 ? Ssl 12:07 0:00 /usr/libexec/platform-python -s /usr/sbin/firewalld --nofork --nopid
root 976 0.0 0.7 401624 30708 ? Ssl 12:07 0:03 /usr/libexec/platform-python -Es /usr/sbin/tuned -l -P
polkitd 796 0.0 0.6 1780404 27536 ? Ssl 12:07 0:19 /usr/lib/polkit-1/polkitd --no-debug
root 1463 0.0 0.4 377288 19020 ? Ssl 12:07 0:01 /usr/sbin/rsyslogd -n
root 948 0.0 0.4 407028 18992 ? Ssl 12:07 0:00 /usr/sbin/NetworkManager --no-daemon
root 630 0.0 0.4 93740 16844 ? Ss 12:07 0:02 /usr/lib/systemd/systemd-journald
root 1 0.0 0.3 197248 15656 ? Ss 12:07 0:06 /usr/lib/systemd/systemd --switched-root --system --deserialize 18
[root@control scripts]# top
top - 23:51:24 up 11:44, 1 user, load average: 0.16, 164.44, 532.60
Tasks: 267 total, 1 running, 266 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 0.0 sy, 0.0 ni,100.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 3918.5 total, 2592.0 free, 885.2 used, 441.3 buff/cache
MiB Swap: 2048.0 total, 2048.0 free, 0.0 used. 2791.3 avail Mem
系统已恢复正常，测试shell命令行终端有无卡顿缓慢情况，经测试恢复正常。
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