[2020年]OCP 19c 認證1Z0-083考試題庫（第2題）-CUUG內部學員版083題庫解析
2、Choose three. In which three situations can you use threshold server-generated alerts to help diagnose and fix problems?
A) when free space in a dictionary managed tablespace falls below a specified percentage
B) when free space in a locally managed tablespace falls below a specified percentage
C) when the total number of locked user account exceeds a specific value
D) when the number of logons per second exceeds a specific value
E) when a resumable statement is suspended
F) when the total number of logons exceeds a specific value
Answer ：ABF
(解析：有關 server-generated alerts 的考題以前考的比較多。該考題的答案更加廣泛，比較難。 用戶鎖的數量 oracle 應該是不會去關注的。)
非閾值預警直接進入 DBA_ALERT_HISTORY，閾值預警進入 DBA_OUTSTANDING_ALERTS 清空后進入 DBA_ALERT_HISTORY。 Oracle 只提供預警，不會自動處理。只有管理員看到信息后處理，或達不到預警條件后消失。