Which three statements are true for Oracle Enterprise Manager snapshots and baselines?
A.
Oracle Enterprise Manager is the interface managing baseline and baseline templates.
B.
Oracle Enterprise Manager is the interface managing snapshots and snapshot templates.
C.
Oracle Enterprise Manager can view but no edit the threshold settings for baseline metrics.
D.
Oracle Enterprise Manager, by default, deletes baselines on a rolling seven-day interval.
E.
You can specify and preserve a pair or a range ofsnapshotas abaselinewith Oracle Enterprise
Manager.
F.
You can specify and preserve a pair or a range of baseline as a snapshot with Oracle
Enterprise Manager.
Explanation:
A:You can also create baselines for a contiguous time period in the future using
baseline templates. There are two types of baseline templates: single and repeating.
E: (not F):A baseline is a pair of snapshots that represents a specific period of usage(not F). Once
baselines are defined they can be used to compare current performance against similar periods in
the past.
https://docs.oracle.com/cd/B28359_01/server.111/b28274/autostat.htm
A –
5.3.2 Managing Baselines
The primary interface for managing baselines is Oracle Enterprise Manager. Whenever possible, you should manage baselines using Oracle Enterprise Manager
B –
5.3.1 Managing Snapshots
The primary interface for managing snapshots is Oracle Enterprise Manager. Whenever possible, you should manage snapshots using Oracle Enterprise Manager
E
AWR supports the capture of baseline data by enabling you to specify and preserve a pair or range of AWR snapshots as a baseline.
C- NOT True
https://docs.oracle.com/cd/B28359_01/server.111/b28275/tdppt_degrade.htm#TDPPT334
Setting Metric Thresholds for Baselines
As explained in “Setting Metric Thresholds for Performance Alerts”, a metric is the rate of change in a cumulative statistic. Alerts notify you when particular metric thresholds are crossed. When the metric thresholds are crossed, the system is in an undesirable state. You can edit the threshold settings for baseline metrics.