053-5

Examine the section of the Health Check report given below:
DBMS_HM.GET_RUN_REPORT('HM_RUN_1061')
Run Name : HM_RUN_1061 Run Id : 1061 Check Name : Data Block Integrity Check Mode :
REACTIVE Status : COMPLETED Start Time : 2007-05-12 22:11:02.032292 -07:00 End Time :
2007-05-12 22:11:20.835135 -07:00 Error Encountered : 0
Source Incident Id : 7418
Number of Incidents Created :0
Which two statements are true regarding the Health Check report? (Choose two.)
A. Health Check was performed manually.
B. Health Check was performed to check the disk image block corruptions.
C. Health Check was performed to check interblock and intersegment corruption.
D. Health Check was performed to verify the integrity of database files and report failures.
E. Health Check was performed by the Health Monitor automatically in response to a critical error.

Health Monitor 健康监测
Health Monitor是11g里新增加的特性，它也是属于数据库的诊断框架的一个模块。它在数据库遇到严重错误时执行自动诊断检查（Reactive），你也可以根据需要随时进行手动检查（Manually）。HM可以检查：文件损坏、物理逻辑块损坏、redo和undo故障、数据字典损坏等。HM根据检查的结果可以产生一个报表，并提供解决问题的建议。

1)   Reactive
Fault diagnosability infrastructure能自动响应严重的错误（critical error）。

2） Manually
可以通过DBMS_HM系统包或 Enterprise Manager来手工运行HM。