0 Oracle_052_lesson_p12

you should be able to:
Manage optimizer statistics
Manage the Automatic Workload Repository (AWR) 自动负载知识库
Use the Automatic Database Diagnostic Monitor (ADDM) 自动数据库诊断监控
Describe and use the advisory framework
Set alert thresholds 阈值
Use server-generated alerts
Use automated tasks

AWR --（严重错误）--> ADR 自动诊断知识库

术语
Automatic Workload Repository (AWR): Infrastructure for data gathering,analysis,and solutions recommendations
AWR Baseline: AWR基线 A set of AWR snapshots for performance comparison
Metric: 度量值 Rate of change in a cumulative statistic
Statistics: 统计信息Data collections providing database and object detail
Optimizer statistics: 优化器统计信息Used by query optimizer
Database statistics: 数据库统计信息Used for performance
Threshold: 阈值A boundary value againstwhich metric values are compared

（编辑：李大同）

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