systemd-analyze

• 起動にかかった時間の出力

• 実行

  # systemd-analyze
  Startup finished in 606ms (kernel) + 2.571s (initrd) + 10.786s (userspace) = 13.964s
  

• blame オプションを付けることで unit の実行に掛かった時間を sort して出力

  # systemd-analyze blame
            2.270s NetworkManager-wait-online.service
            2.032s boot.mount
            1.634s firewalld.service
            1.623s dev-mapper-centos\x2droot.device
            1.286s lvm2-monitor.service
            1.071s tuned.service
             730ms postfix.service
             659ms network.service
             389ms systemd-udevd.service
             257ms rhel-dmesg.service
             252ms auditd.service
             216ms polkit.service
             169ms lvm2-pvscan@252:2.service
             167ms systemd-vconsole-setup.service
             154ms plymouth-quit-wait.service
             152ms NetworkManager.service
             148ms plymouth-quit.service
             132ms rsyslog.service
             131ms chronyd.service
             102ms systemd-tmpfiles-setup-dev.service
              89ms rhel-readonly.service
              88ms systemd-logind.service
              84ms systemd-user-sessions.service
              79ms kdump.service
              78ms systemd-udev-trigger.service
              71ms sshd.service
              63ms rhel-domainname.service
              63ms rhel-import-state.service
              53ms systemd-journald.service
              50ms systemd-tmpfiles-clean.service
              50ms systemd-sysctl.service
              50ms systemd-remount-fs.service
              48ms systemd-tmpfiles-setup.service
              44ms plymouth-start.service
              42ms systemd-fsck-root.service
              40ms plymouth-read-write.service
              39ms sys-kernel-debug.mount
              36ms kmod-static-nodes.service
              36ms dev-mqueue.mount
              34ms dev-hugepages.mount
              32ms systemd-journal-flush.service
              27ms dev-mapper-centos\x2dswap.swap
              25ms systemd-update-utmp.service
              13ms systemd-update-utmp-runlevel.service
               8ms sys-kernel-config.mount
               7ms systemd-random-seed.service