После отправки сервер на перезагрузку, долго выключается сервер (порядка 3 минут), далее идет нормальная загрузка.
До выключения/перезагрузки
Aug 16 20:34:35 example systemd[1]: Stopping Session 3 of user app.
Aug 16 20:34:35 example systemd[1]: Stopping Session 1 of user root.
Aug 16 20:34:35 example systemd[1]: Stopping User Manager for UID 0...
Aug 16 20:34:35 example systemd[1]: Stopping User Manager for UID 1000...
Aug 16 20:34:35 example systemd[1]: Stopped target Graphical Interface.
Aug 16 20:34:35 example systemd[1]: Stopped target Multi-User System.
После включения
Aug 16 20:37:40 example kernel: [ 0.000000] Linux version 4.15.0-112-generic (buildd@lcy01-amd64-027) (gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)) #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 (Ubuntu 4.15.0-112.113-generic 4.15.18)
Aug 16 20:37:40 example kernel: [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.15.0-112-generic root=UUID=25e819f2-0cf9-4be3-855c-0e000e7b1648 ro quiet
Aug 16 20:37:40 example kernel: [ 0.000000] KERNEL supported cpus:
Aug 16 20:37:40 example kernel: [ 0.000000] Intel GenuineIntel
Aug 16 20:37:40 example kernel: [ 0.000000] AMD AuthenticAMD
Aug 16 20:37:40 example kernel: [ 0.000000] Centaur CentaurHauls
Aug 16 20:37:40 example kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Aug 16 20:37:40 example kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Aug 16 20:37:40 example kernel: [ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Aug 16 20:37:40 example kernel: [ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
Aug 16 20:37:40 example kernel: [ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
Aug 16 20:37:40 example kernel: [ 0.000000] e820: BIOS-provided physical RAM map:
.............
Параметры сервера
Linux 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
systemd 237
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD -IDN2 +IDN -PCRE2 default-hierarchy=hybrid