注意，此问题不仅仅是瀚高数据库存在，Oracle数据库也存在本问题，请参见Oracle文章： Auto Startup/Shutdown Issue In RHEL 7.X Using Systemctl After Manually Shutdown/Start Database (Doc ID 2401600.1)
2、问题原因
本问题的原因是systemd固有的设计方式与实现机制。
3、解决方案
（1）systemd(systemctl)启动瀚高数据库服务的证据
[root@dbserver 2017]# ps -ef |grep postg root 2016 1 0 05:42 ? 00:00:00 /opt/HighGo4.3.4.7-see/bin/postgres -D /opt/HighGo4.3.4.7-see/data root 2017 2016 0 05:42 ? 00:00:00 postgres: logger process root 2019 2016 0 05:42 ? 00:00:00 postgres: checkpointer process root 2020 2016 0 05:42 ? 00:00:00 postgres: writer process root 2021 2016 0 05:42 ? 00:00:00 postgres: wal writer process root 2022 2016 0 05:42 ? 00:00:00 postgres: autovacuum launcher process root 2023 2016 0 05:42 ? 00:00:00 postgres: archiver process root 2024 2016 0 05:42 ? 00:00:00 postgres: stats collector process root 2025 2016 0 05:42 ? 00:00:00 postgres: bgworker: logical replication launcher root 6039 2132 0 06:29 pts/0 00:00:00 grep --color=auto postg [root@dbserver 2017]# [root@dbserver 2017]# [root@dbserver 2017]# systemctl status hgdb-see-4.3.4.7 ● hgdb-see-4.3.4.7.service - hgdb-see-4.3.4.7 Loaded: loaded (/usr/lib/systemd/system/hgdb-see-4.3.4.7.service; enabled; vendor preset: disabled) Active: active (running) since Sat 2020-02-29 05:42:02 EST; 50min ago Process: 2011 ExecStart=/opt/HighGo4.3.4.7-see/etc/hgdb-see-4.3.4.7 start (code=exited, status=0/SUCCESS) Process: 1171 ExecStartPre=/usr/bin/sleep 30 (code=exited, status=0/SUCCESS) Main PID: 2016 (postgres) Tasks: 9 CGroup: /system.slice/hgdb-see-4.3.4.7.service ----------------------->>>>本段输出中，CGroup及下面的输出是systemd启动瀚高数据库的证据 ├─2016 /opt/HighGo4.3.4.7-see/bin/postgres -D /opt/HighGo4.3.4.7-see/data ├─2017 postgres: logger process ├─2019 postgres: checkpointer process ├─2020 postgres: writer process ├─2021 postgres: wal writer process ├─2022 postgres: autovacuum launcher process ├─2023 postgres: archiver process ├─2024 postgres: stats collector process └─2025 postgres: bgworker: logical replication launcher Feb 29 05:41:31 dbserver systemd[1]: Starting hgdb-see-4.3.4.7... Feb 29 05:42:01 dbserver hgdb-see-4.3.4.7[2011]: Starting HighGo Database Server: Feb 29 05:42:02 dbserver hgdb-see-4.3.4.7[2011]: waiting for server to start.... done Feb 29 05:42:02 dbserver hgdb-see-4.3.4.7[2011]: server started Feb 29 05:42:02 dbserver hgdb-see-4.3.4.7[2011]: HighGo Database Server started successfully Feb 29 05:42:02 dbserver systemd[1]: Started hgdb-see-4.3.4.7. [root@dbserver 2017]# [root@dbserver system.slice]# cd hgdb-see-4.3.4.7.service/ [root@dbserver hgdb-see-4.3.4.7.service]# ll total 0 -rw-r--r-- 1 root root 0 Feb 29 05:41 cgroup.clone_children --w--w--w- 1 root root 0 Feb 29 05:41 cgroup.event_control -rw-r--r-- 1 root root 0 Feb 29 05:41 cgroup.procs -rw-r--r-- 1 root root 0 Feb 29 05:41 notify_on_release -rw-r--r-- 1 root root 0 Feb 29 05:41 tasks [root@dbserver hgdb-see-4.3.4.7.service]# pwd /sys/fs/cgroup/systemd/system.slice/hgdb-see-4.3.4.7.service [root@dbserver hgdb-see-4.3.4.7.service]# cat cgroup.clone_children 0 [root@dbserver hgdb-see-4.3.4.7.service]# cat cgroup.event_control cat: cgroup.event_control: Invalid argument [root@dbserver hgdb-see-4.3.4.7.service]# cat cgroup.procs 2016 2017 2019 2020 2021 2022 2023 2024 2025 [root@dbserver hgdb-see-4.3.4.7.service]# cat notify_on_release 1 [root@dbserver hgdb-see-4.3.4.7.service]# cat tasks -------->>>>这是systemd启动瀚高数据库的证据 2016 2017 2019 2020 2021 2022 2023 2024 2025 [root@dbserver hgdb-see-4.3.4.7.service]# pwd /sys/fs/cgroup/systemd/system.slice/hgdb-see-4.3.4.7.service [root@dbserver hgdb-see-4.3.4.7.service]# [root@dbserver hgdb-see-4.3.4.7.service]# cd .. [root@dbserver system.slice]# cd .. [root@dbserver systemd]# ll total 0 -rw-r--r-- 1 root root 0 Feb 29 05:41 cgroup.clone_children --w--w--w- 1 root root 0 Feb 29 05:41 cgroup.event_control -rw-r--r-- 1 root root 0 Feb 29 05:41 cgroup.procs -r--r--r-- 1 root root 0 Feb 29 05:41 cgroup.sane_behavior -rw-r--r-- 1 root root 0 Feb 29 05:41 notify_on_release -rw-r--r-- 1 root root 0 Feb 29 05:41 release_agent drwxr-xr-x 101 root root 0 Feb 29 05:56 system.slice -rw-r--r-- 1 root root 0 Feb 29 05:41 tasks drwxr-xr-x 4 root root 0 Feb 29 05:41 user.slice [root@dbserver systemd]# cd user.slice/ [root@dbserver user.slice]# ll total 0 -rw-r--r-- 1 root root 0 Feb 29 05:41 cgroup.clone_children --w--w--w- 1 root root 0 Feb 29 05:41 cgroup.event_control -rw-r--r-- 1 root root 0 Feb 29 05:41 cgroup.procs -rw-r--r-- 1 root root 0 Feb 29 05:41 notify_on_release -rw-r--r-- 1 root root 0 Feb 29 05:41 tasks drwxr-xr-x 3 root root 0 Feb 29 06:40 user-0.slice drwxr-xr-x 3 root root 0 Feb 29 05:41 user-42.slice [root@dbserver user.slice]# cat cgroup.procs [root@dbserver user.slice]# pwd /sys/fs/cgroup/systemd/user.slice [root@dbserver user.slice]# [root@dbserver user.slice]# cat tasks [root@dbserver user.slice]#
