Registering Adaptive Threshold Metrics

Adaptive threshold metrics are not immediately available by default; they must be defined and added to the system (registered) in order for them to become available for use by Enterprise Manager. Not all metrics can have adaptive thresholds: Adaptive Threshold metrics must fall into one of the following categories:

Load
LoadType
Utilization
Response

You can register adaptive threshold metrics from the Advanced Threshold Management page.

From a target menu (Host is used in this example), select Monitoring and then Metric and Collection Settings.
In the Related Links area, click Advanced Threshold Management.The Advanced Threshold Management page displays.
From the Select Active Adaptive Setting menu, select Moving Window, additional controls are displayed allowing you to define the moving window's Threshold Change Frequency and the Accumulated Trailing Data that will be used to compute the adaptive thresholds.
- Threshold Change Frequency (The target timezone is used.)
  - None: One set of thresholds will be calculated using past data. This set of thresholds will be valid for the entire week.
    
    None should be used when there is no usage pattern between daytime versus nighttime or within hours of a day.
  - By Day and Night: Two sets of thresholds (day and night) will be calculated using past data. Day thresholds will be calculated using previous day's daytime data, Night thresholds will be calculated using previous day's nighttime data. Thresholds will be changed every day and night.
    
    By Day and Night should be used when there are distinct performance and usage variations between day hours and night hours.
  - By Weekdays and Weekend: Two sets of thresholds (weekdays and weekend) will be calculated using past data. Weekdays thresholds will be calculated using the previous weekdays data. Weekend thresholds will be calculated using the previous weekend data. Thresholds will be changed at start of the weekdays and start of the weekend.
  - By Day and Night, over Weekdays and Weekend: Four sets of thresholds will be calculated using past data. Weekdays Day thresholds will be calculated using the previous weekday's daytime data, Weekdays Night thresholds will be calculated using the previous weekday's nighttime data. Weekends Day thresholds will be calculated using previous weekend's daytime data, Weekends Night thresholds will be calculated using previous weekend's nighttime data. Thresholds will be changed each day and night.
    
    Weekday day hours (7a.m. to 7p.m)
    
    Weekend day hours (7am to 7pm)
    
    Weekday night hours (7pm to 7am)
    
    Weekend night hours (7pm to 7am)
  - By Day of Week: Seven sets of thresholds will be calculated, one for each day of the week. Thresholds will be calculated using the previous week's same-day data. Thresholds will be changed every day.
    
    By Day of Week should be used when there is significant daily variation in usage for each day of week.
  - By Day and Night, per Day of Week: Fourteen sets of thresholds will be calculated, one for each day of the week and one for each night of the week. Day thresholds will be calculated using previous weeks same-day daytime data, Night thresholds will be calculated using the previous week's same-day nighttime data. Thresholds will be changed every day and night each day of the week.
- Accumulated Trailing Data
  
  Total time period for which metric data will be collected. Options are 7, 14, 21, and 28 days. In general, you should select the larger value as the additional data helps in computing more accurate thresholds.
Click Save and accept the confirmation. The Register Metrics button becomes active in the Register Adaptive Metrics region. Click Register Metrics. The Metric Selector dialog displays.
Select the desired metric(s) and then click OK. A confirmation dialog displays stating that the selected metric(s) will be added to this target's Adaptive Setting. Click Yes to confirm the action. The selected metrics appear in the Register Adaptive Metrics region.
Once registered as adaptive metrics, you can then select individual metrics to configure thresholds. When metrics are first registered, by default, Enterprise Manager enables Significance Level and sets the warning and critical thresholds at 95 and 99 percentile respectively.