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Ubuntu 18.04 LTs 启动缓慢

tag-icon • tag-icon boot 18.04
Ubuntu 18.04 LTs 启动缓慢

一周以来，我的系统启动速度非常慢。以下是 systemd-analyze blame 的结果：

50.961s vmware-workstation-server.service
     26.680s dev-sda1.device
     24.653s plymouth-quit-wait.service
     23.519s systemd-journal-flush.service
     23.178s keyboard-setup.service
     18.941s mysql.service
     16.426s lvm2-monitor.service
     15.701s systemd-udevd.service
     14.480s systemd-sysctl.service
      6.972s NetworkManager-wait-online.service
      5.991s plymouth-start.service
      5.951s NetworkManager.service
      5.512s snapd.service
      5.116s [email protected]
      4.912s udisks2.service
      4.358s ModemManager.service
      4.212s networkd-dispatcher.service
      4.134s accounts-daemon.service
      3.831s vmware-USBArbitrator.service
      3.705s libvirtd.service
      3.647s thermald.service
      3.534s virtualbox.service
      3.242s systemd-tmpfiles-setup-dev.service

以及 systemd-analyze critical-chain：

graphical.target @1min 39.914s
└─multi-user.target @1min 39.914s
  └─vmware-workstation-server.service @48.953s +50.961s
    └─network-online.target @45.787s
      └─NetworkManager-wait-online.service @38.814s +6.972s
        └─NetworkManager.service @32.861s +5.951s
          └─dbus.service @32.821s
            └─basic.target @32.821s
              └─sockets.target @32.821s
                └─snapd.socket @32.798s +22ms
                  └─sysinit.target @32.774s
                    └─cryptsetup.target @32.774s
                      └─systemd-ask-password-wall.path @3.501s
                        └─-.mount @3.487s
                          └─system.slice @3.501s
                            └─-.slice @3.487s

我知道这太多了。我知道问题可能出在哪里。但我不知道如何解决。非常感谢您的帮助。

更新

23.122s dev-sda1.device
     17.428s keyboard-setup.service
     17.241s plymouth-quit-wait.service
     15.802s lvm2-monitor.service
     15.701s systemd-tmpfiles-setup-dev.service
     14.746s systemd-journal-flush.service
     14.029s systemd-sysctl.service
     12.552s mysql.service
      7.669s NetworkManager-wait-online.service
      6.739s snapd.service
      6.179s [email protected]
      6.151s plymouth-start.service
      4.449s NetworkManager.service
      4.443s libvirtd.service
      4.414s networkd-dispatcher.service
      4.078s udisks2.service
      2.674s systemd-udevd.service
      2.214s thermald.service
      2.175s ModemManager.service
      2.083s accounts-daemon.service

答案1

dev-sda1.device 的条目和其他几个条目表明问题出在硬盘驱动器的速度上。

SSD（固态硬盘）将显著加快启动速度。

请注意，plymouth-quit-wait.service 等服务的缓慢仅仅表明它正在等待其他东西 - 在这种情况下，刷新到磁盘。

如果您发现情况变得更糟，则可能是您的硬盘已满或您安装了更多软件，这会使启动速度稍微慢一些，但更换硬盘会带来最大的改善。

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