我是一名新手服务器管理员。我的服务器上有 4 个网站在 nginx 上运行。有时速度会变慢，我不得不重启机器。很快我将为我的客户部署网站，不能冒服务器崩溃的风险。我认为正在运行的进程太多了，但实际上我还不知道 174 个进程是否是正常数字。
$ps aux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 154484 5184 ? Ss Jul11 0:55 /sbin/init
root 2 0.0 0.0 0 0 ? S Jul11 0:00 [kthreadd]
root 3 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/0]
root 5 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/0:0H]
root 7 0.0 0.0 0 0 ? S Jul11 2:33 [rcu_sched]
root 8 0.0 0.0 0 0 ? S Jul11 0:00 [rcu_bh]
root 9 0.0 0.0 0 0 ? S Jul11 0:00 [migration/0]
root 10 0.0 0.0 0 0 ? S< Jul11 0:00 [lru-add-drain]
root 11 0.0 0.0 0 0 ? S Jul11 0:10 [watchdog/0]
root 12 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/0]
root 13 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/1]
root 14 0.0 0.0 0 0 ? S Jul11 0:06 [watchdog/1]
root 15 0.0 0.0 0 0 ? S Jul11 0:04 [migration/1]
root 16 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/1]
root 18 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/1:0H]
root 19 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/2]
root 20 0.0 0.0 0 0 ? S Jul11 0:08 [watchdog/2]
root 21 0.0 0.0 0 0 ? S Jul11 0:00 [migration/2]
root 22 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/2]
root 24 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/2:0H]
root 25 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/3]
root 26 0.0 0.0 0 0 ? S Jul11 0:06 [watchdog/3]
root 27 0.0 0.0 0 0 ? S Jul11 0:00 [migration/3]
root 28 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/3]
root 30 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/3:0H]
root 31 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/4]
root 32 0.0 0.0 0 0 ? S Jul11 0:08 [watchdog/4]
root 33 0.0 0.0 0 0 ? S Jul11 0:00 [migration/4]
root 34 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/4]
root 36 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/4:0H]
root 37 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/5]
root 38 0.0 0.0 0 0 ? S Jul11 0:06 [watchdog/5]
root 39 0.0 0.0 0 0 ? S Jul11 0:00 [migration/5]
root 40 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/5]
root 42 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/5:0H]
root 43 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/6]
root 44 0.0 0.0 0 0 ? S Jul11 0:08 [watchdog/6]
root 45 0.0 0.0 0 0 ? S Jul11 0:00 [migration/6]
root 46 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/6]
root 48 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/6:0H]
root 49 0.0 0.0 0 0 ? S Jul11 0:00 [cpuhp/7]
root 50 0.0 0.0 0 0 ? S Jul11 0:06 [watchdog/7]
root 51 0.0 0.0 0 0 ? S Jul11 0:00 [migration/7]
root 52 0.0 0.0 0 0 ? S Jul11 0:00 [ksoftirqd/7]
root 54 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/7:0H]
root 55 0.0 0.0 0 0 ? S Jul11 0:00 [kdevtmpfs]
root 56 0.0 0.0 0 0 ? S< Jul11 0:00 [netns]
root 57 0.0 0.0 0 0 ? S Jul11 0:04 [khungtaskd]
root 58 0.0 0.0 0 0 ? S Jul11 0:00 [oom_reaper]
root 59 0.0 0.0 0 0 ? S< Jul11 0:00 [writeback]
root 60 0.0 0.0 0 0 ? S Jul11 0:00 [kcompactd0]
root 61 0.0 0.0 0 0 ? SN Jul11 0:00 [ksmd]
root 62 0.0 0.0 0 0 ? SN Jul11 0:23 [khugepaged]
root 63 0.0 0.0 0 0 ? S< Jul11 0:00 [crypto]
root 64 0.0 0.0 0 0 ? S< Jul11 0:00 [kintegrityd]
root 65 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 66 0.0 0.0 0 0 ? S< Jul11 0:00 [kblockd]
root 67 0.0 0.0 0 0 ? S< Jul11 0:00 [ata_sff]
root 68 0.0 0.0 0 0 ? S< Jul11 0:00 [md]
root 69 0.0 0.0 0 0 ? S< Jul11 0:00 [devfreq_wq]
root 70 0.0 0.0 0 0 ? S< Jul11 0:00 [watchdogd]
root 75 0.0 0.0 0 0 ? S Jul11 0:00 [kswapd0]
root 76 0.0 0.0 0 0 ? S< Jul11 0:00 [vmstat]
root 77 0.0 0.0 0 0 ? S Jul11 0:00 [ecryptfs-kthrea]
root 116 0.0 0.0 0 0 ? S< Jul11 0:00 [kthrotld]
root 118 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 119 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 120 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 121 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 122 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 123 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 124 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 125 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 126 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 127 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 128 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 129 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 130 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 131 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 132 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 133 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 134 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 135 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 136 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 137 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 138 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 139 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 140 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 141 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 142 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 143 0.0 0.0 0 0 ? S< Jul11 0:00 [bioset]
root 144 0.0 0.0 0 0 ? S< Jul11 0:00 [ipv6_addrconf]
root 165 0.0 0.0 0 0 ? S< Jul11 0:00 [charger_manager]
root 678 0.0 0.0 0 0 ? S< Jul11 0:31 [kworker/0:1H]
root 826 0.0 0.0 0 0 ? S 09:02 0:00 [kworker/u16:1]
root 889 0.0 0.0 0 0 ? S< Jul11 0:02 [kworker/2:1H]
root 890 0.0 0.0 0 0 ? S Jul11 0:45 [jbd2/vda-8]
root 891 0.0 0.0 0 0 ? S< Jul11 0:00 [ext4-rsv-conver]
root 892 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/1:1H]
root 1305 0.0 0.0 10892 5736 ? Ss 10:01 0:00 sshd: root@pts/0
root 1437 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/3:1H]
root 1453 0.0 0.0 0 0 ? S Jul11 0:00 [kauditd]
root 1464 0.0 0.0 12920 3084 ? Ss Jul11 0:04 /lib/systemd/systemd-udevd
root 1467 0.0 0.0 7604 4336 ? Ss Jul11 0:23 /usr/sbin/haveged --Foreground --verbose=1 -w 1024
root 1470 0.0 0.1 20788 8468 ? Ss Jul11 8:06 /lib/systemd/systemd-journald
root 1527 0.0 0.0 6148 4200 pts/0 Ss+ 10:01 0:00 -bash
message+ 1554 0.0 0.0 5928 3228 ? Ss Jul11 0:01 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation
root 1573 0.0 0.0 5136 2548 ? Ss Jul11 0:09 /usr/sbin/cron -f
root 1585 0.0 0.0 3416 728 ? Ss Jul11 0:05 /lib/systemd/systemd-logind
syslog 1588 0.0 0.0 225856 3668 ? Ssl Jul11 2:37 /usr/sbin/rsyslogd -n
root 1655 0.0 0.0 47272 6872 ? Ss Jul11 0:00 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
postfix 1658 0.0 0.0 34232 3788 ? S 10:31 0:00 anvil -l -t unix -u -c
root 1664 0.0 0.0 0 0 ? S 10:38 0:00 [kworker/u16:0]
root 1667 0.0 0.0 10892 5544 ? Rs 10:39 0:00 sshd: root@pts/1
root 1673 0.0 0.0 4068 1436 tty1 Ss+ Jul11 0:00 /sbin/agetty --noclear tty1 linux
root 1677 0.0 0.0 3884 1776 ttyAMA0 Ss+ Jul11 0:00 /sbin/agetty --keep-baud 115200 38400 9600 ttyAMA0 vt220
root 1700 0.0 0.0 9772 5304 ? Ss Jul11 1:55 /usr/sbin/sshd -D
ntp 1782 0.0 0.0 14524 4116 ? Ss Jul11 3:59 /usr/sbin/ntpd -p /var/run/ntpd.pid -g -c /var/lib/ntp/ntp.conf.dhcp -u 106:110
root 1793 0.0 0.0 5180 2524 ? Ss Jul11 0:00 /sbin/dhclient -1 -v -pf /run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases -I -df /var/lib/dhcp/dhclient6.eth0.leases eth0
root 1889 0.0 0.0 6148 4172 pts/1 Ss 10:39 0:00 -bash
postfix 1908 0.0 0.0 34232 3888 ? S 10:41 0:00 pickup -l -t unix -u -c
postfix 1933 0.0 0.0 37456 7604 ? S 10:45 0:00 smtpd -n smtp -t inet -u -c -o stress=
postfix 1934 0.0 0.0 34232 3852 ? S 10:45 0:00 proxymap -t unix -u
root 1942 0.0 0.0 0 0 ? S 10:46 0:00 [kworker/u16:2]
root 1943 0.5 0.0 9772 5280 ? Ss 10:46 0:00 sshd: [accepted]
sshd 1944 0.0 0.0 9772 1824 ? S 10:46 0:00 sshd: [net]
root 1945 0.0 0.0 7140 2844 pts/1 R+ 10:46 0:00 ps aux
root 1960 0.0 0.0 34152 3856 ? Ss Jul11 0:41 /usr/lib/postfix/sbin/master
postfix 1963 0.0 0.0 34276 3880 ? S Jul11 0:05 qmgr -l -t unix -u
root 1965 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/6:1H]
root 1970 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/4:1H]
postfix 1977 0.0 0.0 37004 6048 ? S Jul11 0:06 tlsmgr -l -t unix -u -c
root 1996 0.0 0.0 0 0 ? S< Jul11 0:00 [kworker/7:1H]
root 2436 0.0 0.0 0 0 ? S< Jul12 0:00 [kworker/5:1H]
martina 5619 0.0 0.4 45040 35108 ? S Jul12 3:55 /home/martina/www/portfoliomga/.virtualenv/bin/uwsgi -H /home/martina/www/portfoliomga/.virtualenv --ini /home/martina/www/portfoliomga/
martina 5622 0.0 0.4 712316 36064 ? Sl Jul12 0:00 /home/martina/www/portfoliomga/.virtualenv/bin/uwsgi -H /home/martina/www/portfoliomga/.virtualenv --ini /home/martina/www/portfoliomga/
martina 5623 0.0 0.4 714340 38836 ? Sl Jul12 0:00 /home/martina/www/portfoliomga/.virtualenv/bin/uwsgi -H /home/martina/www/portfoliomga/.virtualenv --ini /home/martina/www/portfoliomga/
martina 5624 0.0 0.4 714072 40080 ? Sl Jul12 0:01 /home/martina/www/portfoliomga/.virtualenv/bin/uwsgi -H /home/martina/www/portfoliomga/.virtualenv --ini /home/martina/www/portfoliomga/
martina 5627 0.0 0.5 713904 44624 ? Sl Jul12 0:04 /home/martina/www/portfoliomga/.virtualenv/bin/uwsgi -H /home/martina/www/portfoliomga/.virtualenv --ini /home/martina/www/portfoliomga/
martina 6045 0.0 0.4 45036 35116 ? S Jul12 3:54 /home/martina/www/websitemg/.virtualenv/bin/uwsgi -H /home/martina/www/websitemg/.virtualenv --ini /home/martina/www/websitemg/releases/
martina 6048 0.0 0.5 708588 42024 ? Sl Jul12 0:00 /home/martina/www/websitemg/.virtualenv/bin/uwsgi -H /home/martina/www/websitemg/.virtualenv --ini /home/martina/www/websitemg/releases/
martina 6049 0.0 0.6 714852 55000 ? Sl Jul12 0:05 /home/martina/www/websitemg/.virtualenv/bin/uwsgi -H /home/martina/www/websitemg/.virtualenv --ini /home/martina/www/websitemg/releases/
martina 6050 0.0 0.6 714848 53316 ? Sl Jul12 0:02 /home/martina/www/websitemg/.virtualenv/bin/uwsgi -H /home/martina/www/websitemg/.virtualenv --ini /home/martina/www/websitemg/releases/
martina 6051 0.0 0.5 708588 42008 ? Sl Jul12 0:00 /home/martina/www/websitemg/.virtualenv/bin/uwsgi -H /home/martina/www/websitemg/.virtualenv --ini /home/martina/www/websitemg/releases/
root 7319 0.0 0.0 0 0 ? S Jul28 0:00 [kworker/7:1]
root 8853 0.0 0.0 0 0 ? S Jul29 0:02 [kworker/3:2]
root 13453 0.0 0.0 0 0 ? S Jul26 0:00 [kworker/4:2]
root 14489 0.0 0.0 0 0 ? S Jul31 0:04 [kworker/0:0]
root 15260 0.0 0.0 0 0 ? S Jul31 0:00 [kworker/6:2]
root 15336 0.0 0.0 0 0 ? S Jul31 0:00 [kworker/2:0]
mysql 15490 0.1 2.1 1137608 176536 ? Ssl Jul31 3:23 /usr/sbin/mysqld
root 16086 0.0 0.0 0 0 ? S Jul26 0:01 [kworker/4:0]
root 20871 0.0 0.0 0 0 ? S Aug01 0:00 [kworker/6:0]
root 23630 0.0 0.0 0 0 ? S Aug01 0:00 [kworker/5:0]
root 26602 0.0 0.0 0 0 ? S Jul23 0:01 [kworker/3:1]
martina 27502 0.0 0.4 45244 35152 ? S Aug01 0:11 /home/martina/www/qs4bmg/.virtualenv/bin/uwsgi -H /home/martina/www/qs4bmg/.virtualenv --ini /home/martina/www/qs4bmg/releases/current/u
martina 27506 0.0 0.4 708796 34332 ? Sl Aug01 0:00 /home/martina/www/qs4bmg/.virtualenv/bin/uwsgi -H /home/martina/www/qs4bmg/.virtualenv --ini /home/martina/www/qs4bmg/releases/current/u
martina 27507 0.0 0.4 708796 34332 ? Sl Aug01 0:00 /home/martina/www/qs4bmg/.virtualenv/bin/uwsgi -H /home/martina/www/qs4bmg/.virtualenv --ini /home/martina/www/qs4bmg/releases/current/u
martina 27508 0.0 0.4 708796 34332 ? Sl Aug01 0:00 /home/martina/www/qs4bmg/.virtualenv/bin/uwsgi -H /home/martina/www/qs4bmg/.virtualenv --ini /home/martina/www/qs4bmg/releases/current/u
martina 27513 0.0 0.5 713404 42104 ? Sl Aug01 0:00 /home/martina/www/qs4bmg/.virtualenv/bin/uwsgi -H /home/martina/www/qs4bmg/.virtualenv --ini /home/martina/www/qs4bmg/releases/current/u
www-data 27564 0.0 0.0 47272 6148 ? S Aug01 0:08 nginx: worker process
www-data 27565 0.0 0.0 47272 7060 ? S Aug01 0:04 nginx: worker process
www-data 27566 0.0 0.0 47272 3868 ? S Aug01 0:11 nginx: worker process
www-data 27567 0.0 0.0 47272 3868 ? S Aug01 0:10 nginx: worker process
www-data 27568 0.0 0.0 47272 3868 ? S Aug01 0:09 nginx: worker process
www-data 27569 0.0 0.0 47272 6276 ? S Aug01 0:11 nginx: worker process
www-data 27570 0.0 0.0 47272 6276 ? S Aug01 0:11 nginx: worker process
www-data 27571 0.0 0.0 47272 3868 ? S Aug01 0:11 nginx: worker process
root 27572 0.0 0.0 0 0 ? S Aug01 0:00 [kworker/2:2]
root 27884 0.0 0.0 0 0 ? S Aug01 0:00 [kworker/1:1]
root 29663 0.0 0.0 0 0 ? S Aug01 0:01 [kworker/0:2]
root 30179 0.0 0.0 0 0 ? S Jul28 0:00 [kworker/7:0]
root 30566 0.0 0.0 0 0 ? S 00:11 0:00 [kworker/1:2]
root 31478 0.0 0.0 0 0 ? S 02:48 0:00 [kworker/5:1]
感谢您提供的任何提示。