Oracle Process termination requested /usr/lib/systemd/systemd

系统日志如下：

2026-10-20T19:32:02.322272+08:00

Process termination requested for pid 1399645 (LGWR) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.322323+08:00

Process termination requested for pid 1399629 (VKRM) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.322478+08:00

Process termination requested for pid 1399635 (DIA0) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.322547+08:00

Process termination requested for pid 1400175 (M001) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.322625+08:00

Process termination requested for pid 1399600 (GEN0) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.322717+08:00

Process termination requested for pid 1399743 (DT01) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.322893+08:00

Process termination requested for pid 1399659 (LREG) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.322913+08:00

Process termination requested for pid 1399639 (LMHB) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.323161+08:00

Process termination requested for pid 1399661 (PXMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.323481+08:00

Process termination requested for pid 1399627 (DBRM) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325301+08:00

Process termination requested for pid 1399771 (P005) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325344+08:00

Process termination requested for pid 1399763 (P001) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325400+08:00

Process termination requested for pid 1399773 (P006) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325434+08:00

Process termination requested for pid 1399777 (TT01) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325530+08:00

Process termination requested for pid 1399665 (MMON) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325660+08:00

Process termination requested for pid 1399655 (SMCO) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325770+08:00

Process termination requested for pid 1400186 (M005) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.325846+08:00

Process termination requested for pid 1399687 (NMON) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.326021+08:00

Process termination requested for pid 1400184 (M004) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.326029+08:00

Process termination requested for pid 1400192 (M007) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.326042+08:00

Process termination requested for pid 1400190 (M006) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.326233+08:00

Process termination requested for pid 1399741 (DT00) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.326309+08:00

Process termination requested for pid 1400180 (M003) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.326334+08:00

Process termination requested for pid 1400194 (M008) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.326607+08:00

Process termination requested for pid 1400196 (M009) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.327034+08:00

Process termination requested for pid 1399752 (D000) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.327212+08:00

Process termination requested for pid 1399761 (P000) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.327222+08:00

Process termination requested for pid 1399765 (P002) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.327535+08:00

Process termination requested for pid 1399767 (P003) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.327545+08:00

Process termination requested for pid 1399769 (P004) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.327999+08:00

Process termination requested for pid 1400033 (AQPC) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.328426+08:00

Process termination requested for pid 1399586 (CLMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.329661+08:00

Process termination requested for pid 1399657 (RECO) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.329926+08:00

Process termination requested for pid 1399623_1399623 (SCMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.330573+08:00

Process termination requested for pid 1399582 (PMON) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.331001+08:00

Process termination requested for pid 1399606 (MMAN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.333274+08:00

Process termination requested for pid 1399802 (P008) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.333347+08:00

Process termination requested for pid 1399804 (P009) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.333748+08:00

Process termination requested for pid 1399754 (S000) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.334224+08:00

Process termination requested for pid 1401166 (CL00) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.334763+08:00

Process termination requested for pid 1399631 (SVCB) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.334929+08:00

Process termination requested for pid 1399685_1399685 (SCMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.334931+08:00

Process termination requested for pid 1400103 (Q004) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.336948+08:00

Process termination requested for pid 1399800 (P007) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.337035+08:00

Process termination requested for pid 1399590 (PSP0) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.337070+08:00

Process termination requested for pid 1399715_1399715 (SCMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.337073+08:00

Process termination requested for pid 1399594 (VKTM) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.338006+08:00

Process termination requested for pid 1399633 (PMAN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.339291+08:00

Process termination requested for pid 1399643 (DBW0) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.339396+08:00

Process termination requested for pid 1399625_1399625 (SCMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.339564+08:00

Process termination requested for pid 1400035 (CJQ0) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.339894+08:00

Process termination requested for pid 1399808 (P00B) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.339928+08:00

Process termination requested for pid 1399621 (DIAG) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.340064+08:00

Process termination requested for pid 1399647 (CKPT) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.340740+08:00

Process termination requested for pid 1399619 (GEN2) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.342321+08:00

Process termination requested for pid 1400097 (Q001) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.342860+08:00

Process termination requested for pid 1399675 (MMNL) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.343072+08:00

Process termination requested for pid 1399814 (P00E) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.343145+08:00

Process termination requested for pid 1683179 (W004) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.346237+08:00

Process termination requested for pid 1399722 (LG01) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.346916+08:00

Process termination requested for pid 1683973 (W002) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.349618+08:00

Process termination requested for pid 1399810 (P00C) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.352256+08:00

Process termination requested for pid 1399791 (GCR0) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.354717+08:00

Process termination requested for pid 1399812 (P00D) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.355508+08:00

Process termination requested for pid 1399702_1399702 (SCMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.355955+08:00

Process termination requested for pid 1399756 (TMON) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.358570+08:00

Process termination requested for pid 1423557 (GCR1) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.360508+08:00

Process termination requested for pid 1399758 (RCBG) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.362955+08:00

Process termination requested for pid 1400095 (QM02) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.364614+08:00

Process termination requested for pid 1401168 (CL01) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.365196+08:00

Process termination requested for pid 1399806 (P00A) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.365312+08:00

Process termination requested for pid 1399816 (P00F) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.366175+08:00

Process termination requested for pid 1399704 (LG00) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.367152+08:00

Process termination requested for pid 1399729_1399729 (SCMN) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.370440+08:00

Process termination requested for pid 1399651 (SMON) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.371669+08:00

Process termination requested for pid 1399775 (TT00) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

2026-10-20T19:32:02.372125+08:00

Process termination requested for pid 1399789 (GCW1) $source = unknown$ , $info = 0$ $request issued by pid: 1(/usr/lib/systemd/systemd), uid: 0$

根本原因（Root Cause）

systemd-logind 行为变更 ：从 RHEL 7.4、RHEL 8、RHEL 9 开始（以及对应的 Oracle Linux 版本），系统引入并强化了 systemd-logind 服务的会话清理逻辑。
默认参数作用 ：在 /etc/systemd/logind.conf 中，参数 KillUserProcesses 默认被设置为 yes（或由系统默认行为触发）。
会话绑定 ：当 DBA 通过 SSH 终端登录为 oracle 用户，并直接在 Shell 里启动数据库时（如手动 sqlplus / as sysdba 运行 startup），该数据库的所有核心进程都会被分配到该 SSH 交互式会话的 systemd cgroup scope 中。
触发清理 ：一旦该终端会话断开连接、因为超时（触发 StopIdleSessionSec）被系统判定为闲置时，systemd-logind 就会为了"保持系统干净"而发起资源清理，无差别地向该 Scope 下的所有子进程发送 SIGTERM / SIGKILL 信号，从而误杀了正在运行的 Oracle PMON 等进程，导致数据库瞬间 Crash。

官方建议的修复方案（Resolutions）

文档中给出了三种主要的规避和彻底解决该问题的方案：

方案一：为 oracle 用户开启持久化常驻（Linger）------ 推荐快速修复

通过强制激活 oracle 用户的驻留机制，允许其在没有任何活跃会话时，后台进程依然能够独立生存。

bash

复制代码

# 必须以 root 身份执行
loginctl enable-linger oracle

Use code with caution.

验证方式 ：执行 loginctl user-status oracle 确保状态已变为允许驻留。

方案二：修改全局 logind 配置（修改全局行为）

如果你不希望系统清理任何用户的后台进程，可以修改全局配置文件 /etc/systemd/logind.conf：

编辑该文件，取消注释或修改： ini
复制代码
```
KillUserProcesses=no
```
Use code with caution.
或者是精确排除 oracle 用户（推荐这种精细做法以保证其他用户的安全性）：

ini
复制代码
```
KillExcludeUsers=oracle
```
Use code with caution.
修改后需重启 systemd-logind 服务生效：systemctl restart systemd-logind。

方案三：使用标准的服务托管（长期最佳生产实践）

官方强调，单节点最安全的做法是不再从交互式 Shell 启动数据库 ，而是将其交由 systemd 或 Oracle 自带的进程管理器接管：

使用标准的 systemd Service 服务单元启动（其运行在系统的 system.slice 中，完全不属于任何 User Session 会话）。
或者在 RAC / 单节点使用 Oracle Restart（Grid Infrastructure），通过 srvctl start database 托管启动，Grid 自身的守护进程天然免疫会话清理。