[2020年]OCP 19c 认证1Z0-083考试题库（第2题）-CUUG内部学员版083题库解析
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：有关 server-generated alerts 的考题以前考的比较多。该考题的答案更加广泛，比较难。 用户锁的数量 oracle 应该是不会去关注的。)
非阈值预警直接进入 DBA_ALERT_HISTORY，阈值预警进入 DBA_OUTSTANDING_ALERTS 清空后进入 DBA_ALERT_HISTORY。 Oracle 只提供预警，不会自动处理。只有管理员看到信息后处理，或达不到预警条件后消失。