Oracle無法生成awr報告 ORA-20200錯誤

生成awr報告的過程中，發生awr報告沒有快照，並返回ORA-20200錯誤。

查看dba_hist_active_session_history發現有數據，判斷mmon和mmnl后台進程的問題，故需要重新啟動mmon和mmnl后台進程

 

方法一：

重啟數據庫

 

方法二：

啟用restricted模式，再立馬禁用：

alter system enable restricted session;
alter system disable restricted session;  

 

alter日志

Stopping background process MMNL
Sat Jan 11 22:07:07 2020
Stopping background process MMON
Sat Jan 11 22:07:39 2020
Background process MMON not dead after 30 seconds
Sat Jan 11 22:07:39 2020
Killing background process MMON
Sat Jan 11 22:08:15 2020
Starting background process MMON
MMON started with pid=19, OS id=2957544
Sat Jan 11 22:08:15 2020
Starting background process MMNL
MMNL started with pid=55, OS id=4960290
Sat Jan 11 22:08:15 2020
ALTER SYSTEM enable restricted session;
Sat Jan 11 22:08:15 2020
ALTER SYSTEM disable restricted session;