The frequency at which PMON provides SERVICE_UPDATE information varies according to the workload of the instance.

PMON提供服务更新的频率依据实例负载的不同有所区别。

youdao

For a process failure on Oracle, no human intervention is required, as the Oracle PMON background process will periodically monitor for these aborted processes.

对于Oracle上的进程失败，无需任何人工干预，就像Oracle PMON后台进程会定期监视这些异常终止的进程那样。

youdao

For user and server processes, PMON will release the locks held by users, roll back every uncommitted transaction, and release any resources this process is using.

而对于用户和服务器进程，PMON将释放用户持有的锁，回滚每个未提交事件，并释放该进程正在使用的所有资源。

youdao