Oracle VKRM 后台进程介绍
有好几次重启 Oracle 11g 数据库，在告警日志中，都会发现在数据库关闭和开启的最后一步，都会出现 VKRM 这个后台进程，于是就去文档中查了一下这个进程的说明。
alert 中关闭数据库的记录
ARC1: Archival stopped
Thread 1 closed at log sequence 14797
Successful close of redo thread 1
Mon Dec 21 21:59:03 2015
Completed: ALTER DATABASE CLOSE NORMAL
ALTER DATABASE DISMOUNT
Shutting down archive processes
Archiving is disabled
Completed: ALTER DATABASE DISMOUNT
ARCH: Archival disabled due to shutdown: 1089
Shutting down archive processes
Archiving is disabled
ARCH: Archival disabled due to shutdown: 1089
Shutting down archive processes
Archiving is disabled
Mon Dec 21 21:59:04 2015
Stopping background process VKTM
Mon Dec 21 21:59:24 2015
Instance shutdown complete
alert 中启动数据库的记录
Starting background process CJQ0
Mon Dec 21 22:13:01 2015
CJQ0 started with pid=59, OS id=8663
Setting Resource Manager plan SCHEDULER[0x3189]:DEFAULT_MAINTENANCE_PLAN via scheduler window
Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter
Mon Dec 21 22:13:05 2015
Starting background process VKRM
Mon Dec 21 22:13:05 2015
VKRM started with pid=73, OS id=8711
官方文档中的说明如下：
这个进程主要负责 Resource Manager ，配合资源计划，为 Oracle所有的进程分配 CPU 资源。
alert 中关闭数据库的记录
ARC1: Archival stopped
Thread 1 closed at log sequence 14797
Successful close of redo thread 1
Mon Dec 21 21:59:03 2015
Completed: ALTER DATABASE CLOSE NORMAL
ALTER DATABASE DISMOUNT
Shutting down archive processes
Archiving is disabled
Completed: ALTER DATABASE DISMOUNT
ARCH: Archival disabled due to shutdown: 1089
Shutting down archive processes
Archiving is disabled
ARCH: Archival disabled due to shutdown: 1089
Shutting down archive processes
Archiving is disabled
Mon Dec 21 21:59:04 2015
Stopping background process VKTM
Mon Dec 21 21:59:24 2015
Instance shutdown complete
alert 中启动数据库的记录
Starting background process CJQ0
Mon Dec 21 22:13:01 2015
CJQ0 started with pid=59, OS id=8663
Setting Resource Manager plan SCHEDULER[0x3189]:DEFAULT_MAINTENANCE_PLAN via scheduler window
Setting Resource Manager plan DEFAULT_MAINTENANCE_PLAN via parameter
Mon Dec 21 22:13:05 2015
Starting background process VKRM
Mon Dec 21 22:13:05 2015
VKRM started with pid=73, OS id=8711
|
VKRM |
Virtual Scheduler for Resource Manager Process |
Serves as centralized scheduler for Resource Manager activity |
VKRM manages the CPU scheduling for all managed Oracle processes. The process schedules managed processes in accordance with an active resource plan. |
Database instance |
这个进程主要负责 Resource Manager ，配合资源计划，为 Oracle所有的进程分配 CPU 资源。
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/26506993/viewspace-1876466/ ，如需转载，请注明出处，否则将追究法律责任。
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