我正在运行虚拟化的 Arch Linux 机器。
有时，它显示内存消耗很高，我不知道原因，因为基本上，机器处于闲置状态。
# ps aux --sort=-%mem | awk 'NR<=10{print $0}'
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
mysql 2126635 0.0 1.2 646276 101188 ? Ssl 11:46 0:00 /usr/bin/mariadbd
root 2126593 0.2 0.4 1724176 39152 ? Ssl 11:46 0:00 /usr/bin/containerd
root 1 0.0 0.1 29268 14708 ? Ss 2023 58:46 /usr/lib/systemd/systemd --system --deserialize 74
root 2126601 0.0 0.1 25140 11180 ? Ss 11:46 0:00 /usr/lib/systemd/systemd-journald
root 2126182 0.1 0.0 235812 7720 ? Ssl 11:33 0:01 /usr/bin/vmtoolsd
root 2126651 0.0 0.0 11224 4344 pts/1 R+ 11:51 0:00 ps aux --sort=-%mem
root 268 0.0 0.0 33176 2792 ? Ss 2023 3:09 /usr/lib/systemd/systemd-udevd
root 2123091 0.0 0.0 7892 2688 pts/1 Ss 11:05 0:00 -bash
dhcpcd 344 0.0 0.0 23232 1760 ? S 2023 3:15 dhcpcd: [manager] [ip4] [ip6]
杀掉之后玛丽亚数据库和容器d流程我得到以下信息：
# ps aux --sort=-%mem
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2126816 1.0 0.6 2655100 53764 ? Ssl 12:13 2:44 /usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
root 2126786 0.0 0.2 1945884 23332 ? Ssl 12:05 0:10 /usr/bin/containerd
mysql 2126768 1.8 0.2 659516 17500 ? Ssl 12:05 4:57 /usr/bin/mariadbd
root 1 0.0 0.1 29268 10020 ? Ss 2023 58:48 /usr/lib/systemd/systemd --system --deserialize 74
root 2126601 0.0 0.1 33428 9828 ? Ss 11:46 0:00 /usr/lib/systemd/systemd-journald
root 2160091 0.1 0.1 12952 8988 ? Ss 16:33 0:00 sshd: root@pts/0
root 2126182 0.1 0.0 310920 5708 ? Ssl 11:33 0:18 /usr/bin/vmtoolsd
root 2160093 0.0 0.0 7908 4680 pts/0 Ss 16:33 0:00 -bash
root 2160287 0.0 0.0 11224 4360 pts/0 R+ 16:35 0:00 ps aux --sort=-%mem
root 268 0.0 0.0 33176 3524 ? Ss 2023 3:10 /usr/lib/systemd/systemd-udevd
dbus 338 0.0 0.0 9132 1612 ? Ss 2023 7:58 /usr/bin/dbus-daemon --system --address=systemd: --nofork --nopidfile --systemd-activation --syslog-only
root 345 0.0 0.0 3372 1584 ? S 2023 1:50 dhcpcd: [privileged proxy]
dhcpcd 344 0.0 0.0 23232 1564 ? S 2023 3:15 dhcpcd: [manager] [ip4] [ip6]
root 375 0.0 0.0 11080 1548 ? Ss 2023 0:00 sshd: /usr/bin/sshd -D [listener] 0 of 10-100 startups
root 340 0.0 0.0 25988 1180 ? Ss 2023 2:02 /usr/lib/systemd/systemd-logind
dhcpcd 347 0.0 0.0 3004 104 ? S 2023 0:00 dhcpcd: [control proxy]
dhcpcd 346 0.0 0.0 3012 84 ? S 2023 0:00 dhcpcd: [network proxy]
root 2 0.0 0.0 0 0 ? S 2023 0:05 [kthreadd]
root 3 0.0 0.0 0 0 ? I< 2023 0:00 [rcu_gp]
root 4 0.0 0.0 0 0 ? I< 2023 0:00 [rcu_par_gp]
root 5 0.0 0.0 0 0 ? I< 2023 0:00 [slub_flushwq]
root 6 0.0 0.0 0 0 ? I< 2023 0:00 [netns]
root 8 0.0 0.0 0 0 ? I< 2023 0:00 [kworker/0:0H-events_highpri]
root 10 0.0 0.0 0 0 ? I< 2023 0:00 [mm_percpu_wq]
root 12 0.0 0.0 0 0 ? I 2023 0:00 [rcu_tasks_kthread]
root 13 0.0 0.0 0 0 ? I 2023 0:00 [rcu_tasks_rude_kthread]
root 14 0.0 0.0 0 0 ? I 2023 0:00 [rcu_tasks_trace_kthread]
root 15 0.0 0.0 0 0 ? S 2023 110:50 [ksoftirqd/0]
root 16 0.0 0.0 0 0 ? I 2023 75:52 [rcu_preempt]
root 17 0.0 0.0 0 0 ? S 2023 0:06 [rcub/1]
root 18 0.0 0.0 0 0 ? S 2023 0:28 [migration/0]
root 19 0.0 0.0 0 0 ? S 2023 0:00 [idle_inject/0]
root 21 0.0 0.0 0 0 ? S 2023 0:00 [cpuhp/0]
root 22 0.0 0.0 0 0 ? S 2023 0:00 [cpuhp/1]
root 23 0.0 0.0 0 0 ? S 2023 0:00 [idle_inject/1]
root 24 0.0 0.0 0 0 ? S 2023 0:29 [migration/1]
root 25 0.0 0.0 0 0 ? S 2023 101:42 [ksoftirqd/1]
root 28 0.0 0.0 0 0 ? S 2023 0:00 [kdevtmpfs]
root 29 0.0 0.0 0 0 ? I< 2023 0:00 [inet_frag_wq]
root 30 0.0 0.0 0 0 ? S 2023 0:35 [kauditd]
root 32 0.0 0.0 0 0 ? S 2023 0:10 [khungtaskd]
root 34 0.0 0.0 0 0 ? S 2023 0:00 [oom_reaper]
root 35 0.0 0.0 0 0 ? I< 2023 0:03 [writeback]
root 36 0.2 0.0 0 0 ? S 2023 588:57 [kcompactd0]
root 37 0.0 0.0 0 0 ? SN 2023 0:00 [ksmd]
root 38 0.0 0.0 0 0 ? SN 2023 28:35 [khugepaged]
root 39 0.0 0.0 0 0 ? I< 2023 0:00 [kintegrityd]
root 40 0.0 0.0 0 0 ? I< 2023 0:00 [kblockd]
root 41 0.0 0.0 0 0 ? I< 2023 0:00 [blkcg_punt_bio]
root 42 0.0 0.0 0 0 ? I< 2023 0:00 [tpm_dev_wq]
root 43 0.0 0.0 0 0 ? I< 2023 0:00 [ata_sff]
root 44 0.0 0.0 0 0 ? I< 2023 0:00 [edac-poller]
root 45 0.0 0.0 0 0 ? I< 2023 0:00 [devfreq_wq]
root 46 0.0 0.0 0 0 ? S 2023 0:00 [watchdogd]
root 48 0.2 0.0 0 0 ? I< 2023 507:29 [kworker/0:1H-kblockd]
root 49 0.1 0.0 0 0 ? S 2023 361:25 [kswapd0]
root 56 0.0 0.0 0 0 ? I< 2023 0:00 [kthrotld]
root 61 0.0 0.0 0 0 ? S 2023 0:00 [irq/24-pciehp]
root 62 0.0 0.0 0 0 ? S 2023 0:00 [irq/25-pciehp]
root 63 0.0 0.0 0 0 ? S 2023 0:00 [irq/26-pciehp]
root 64 0.0 0.0 0 0 ? S 2023 0:00 [irq/27-pciehp]
root 65 0.0 0.0 0 0 ? S 2023 0:00 [irq/28-pciehp]
root 66 0.0 0.0 0 0 ? S 2023 0:00 [irq/29-pciehp]
root 67 0.0 0.0 0 0 ? S 2023 0:00 [irq/30-pciehp]
root 68 0.0 0.0 0 0 ? S 2023 0:00 [irq/31-pciehp]
root 69 0.0 0.0 0 0 ? S 2023 0:00 [irq/32-pciehp]
root 70 0.0 0.0 0 0 ? S 2023 0:00 [irq/33-pciehp]
root 71 0.0 0.0 0 0 ? S 2023 0:00 [irq/34-pciehp]
root 72 0.0 0.0 0 0 ? S 2023 0:00 [irq/35-pciehp]
root 73 0.0 0.0 0 0 ? S 2023 0:00 [irq/36-pciehp]
root 74 0.0 0.0 0 0 ? S 2023 0:00 [irq/37-pciehp]
root 75 0.0 0.0 0 0 ? S 2023 0:00 [irq/38-pciehp]
root 76 0.0 0.0 0 0 ? S 2023 0:00 [irq/39-pciehp]
root 77 0.0 0.0 0 0 ? S 2023 0:00 [irq/40-pciehp]
root 78 0.0 0.0 0 0 ? S 2023 0:00 [irq/41-pciehp]
root 79 0.0 0.0 0 0 ? S 2023 0:00 [irq/42-pciehp]
root 80 0.0 0.0 0 0 ? S 2023 0:00 [irq/43-pciehp]
root 81 0.0 0.0 0 0 ? S 2023 0:00 [irq/44-pciehp]
root 82 0.0 0.0 0 0 ? S 2023 0:00 [irq/45-pciehp]
root 83 0.0 0.0 0 0 ? S 2023 0:00 [irq/46-pciehp]
root 84 0.0 0.0 0 0 ? S 2023 0:00 [irq/47-pciehp]
root 85 0.0 0.0 0 0 ? S 2023 0:00 [irq/48-pciehp]
root 86 0.0 0.0 0 0 ? S 2023 0:00 [irq/49-pciehp]
root 87 0.0 0.0 0 0 ? S 2023 0:00 [irq/50-pciehp]
root 88 0.0 0.0 0 0 ? S 2023 0:00 [irq/51-pciehp]
root 89 0.0 0.0 0 0 ? S 2023 0:00 [irq/52-pciehp]
root 90 0.0 0.0 0 0 ? S 2023 0:00 [irq/53-pciehp]
root 91 0.0 0.0 0 0 ? S 2023 0:00 [irq/54-pciehp]
root 92 0.0 0.0 0 0 ? S 2023 0:00 [irq/55-pciehp]
root 93 0.0 0.0 0 0 ? I< 2023 0:00 [acpi_thermal_pm]
root 94 0.0 0.0 0 0 ? S 2023 0:00 [xenbus_probe]
root 95 0.0 0.0 0 0 ? I< 2023 0:00 [mld]
root 96 0.2 0.0 0 0 ? I< 2023 596:30 [kworker/1:1H-kblockd]
root 97 0.0 0.0 0 0 ? I< 2023 0:00 [ipv6_addrconf]
root 102 0.0 0.0 0 0 ? I< 2023 0:00 [kstrp]
root 106 0.0 0.0 0 0 ? I< 2023 0:00 [zswap1]
root 107 0.0 0.0 0 0 ? I< 2023 0:00 [zswap1]
root 108 0.0 0.0 0 0 ? I< 2023 0:00 [zswap-shrink]
root 109 0.0 0.0 0 0 ? I< 2023 0:00 [kworker/u129:0]
root 148 0.0 0.0 0 0 ? I< 2023 0:00 [charger_manager]
root 181 0.0 0.0 0 0 ? S 2023 0:00 [scsi_eh_0]
root 182 0.0 0.0 0 0 ? I< 2023 0:00 [scsi_tmf_0]
root 183 0.0 0.0 0 0 ? S 2023 0:00 [scsi_eh_1]
root 184 0.0 0.0 0 0 ? I< 2023 0:00 [scsi_tmf_1]
root 185 0.0 0.0 0 0 ? I< 2023 0:00 [cryptd]
root 217 0.0 0.0 0 0 ? S 2023 12:41 [jbd2/sda2-8]
root 218 0.0 0.0 0 0 ? I< 2023 0:00 [ext4-rsv-conver]
root 303 0.0 0.0 0 0 ? S 2023 0:00 [jbd2/sda3-8]
root 304 0.0 0.0 0 0 ? I< 2023 0:00 [ext4-rsv-conver]
root 317 0.0 0.0 0 0 ? S 2023 5:50 [irq/16-vmwgfx]
root 318 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc0]
root 319 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc1]
root 320 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc2]
root 321 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc3]
root 322 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc4]
root 323 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc5]
root 324 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc6]
root 325 0.0 0.0 0 0 ? S 2023 0:00 [card0-crtc7]
root 333 0.0 0.0 0 0 ? I< 2023 0:00 [nfit]
root 365 0.0 0.0 0 0 ? I< 2023 0:00 [cfg80211]
root 378 0.0 0.0 5988 0 tty1 Ss+ 2023 0:00 /sbin/agetty -o -p -- \u --noclear - linux
dhcpcd 379 0.0 0.0 3372 0 ? S 2023 0:00 dhcpcd: [BPF ARP] ens192 X.X.X.X
root 510 0.0 0.0 0 0 ? I< 2023 0:00 [dio/sda2]
root 2524 0.0 0.0 0 0 ? I< 2023 0:00 [tls-strp]
root 1938527 0.5 0.0 0 0 ? I< ene17 6:21 [kworker/1:2H-kblockd]
root 2124077 0.0 0.0 0 0 ? S 11:14 0:00 [psimon]
root 2126602 0.0 0.0 0 0 ? S 11:46 0:00 [psimon]
root 2127706 0.0 0.0 0 0 ? I 12:15 0:06 [kworker/0:4-events]
root 2132781 0.0 0.0 0 0 ? I 12:35 0:01 [kworker/u128:0-events_unbound]
root 2146784 0.0 0.0 0 0 ? I 14:08 0:04 [kworker/1:2-rcu_par_gp]
root 2155973 0.0 0.0 0 0 ? I 15:49 0:01 [kworker/0:0-rcu_par_gp]
root 2155990 0.0 0.0 0 0 ? I 15:49 0:00 [kworker/1:1-rcu_par_gp]
root 2157900 0.0 0.0 0 0 ? I 16:07 0:00 [kworker/u128:2-events_power_efficient]
root 2158776 0.0 0.0 0 0 ? I 16:18 0:00 [kworker/u128:3-zswap1]
root 2160112 0.0 0.0 0 0 ? I 16:34 0:00 [kworker/0:1-rcu_par_gp]
root 2160115 0.0 0.0 0 0 ? I 16:34 0:00 [kworker/0:2]
root 2160116 0.0 0.0 0 0 ? I 16:34 0:00 [kworker/u128:1-events_unbound]
root 2160117 0.0 0.0 0 0 ? I 16:34 0:00 [kworker/u128:4-writeback]
root 2160151 0.0 0.0 0 0 ? I 16:34 0:00 [kworker/1:0-rcu_gp]
root 2160195 0.0 0.0 0 0 ? I 16:34 0:00 [kworker/1:3-events]
自由的输出：
# free -m
total usado libre compartido búf/caché disponible
Mem: 7931 6278 1183 0 768 1653
Inter: 20479 481 19998
# free -g
total usado libre compartido búf/caché disponible
Mem: 7 6 1 0 0 1
Inter: 19 0 19
有什么方法可以释放这块内存吗？
预先感谢您的回答。