The following status levels are used to show historical and trend status for monitored CIs in the Service Health Hierarchy component:
Trend Status
The trend status has three positions: up, down, and no change. It shows the trend of the real-time status.
|
Icon |
Description |
Status |
Status Definition |
|---|---|---|---|
|
|
Red downward arrow |
Downward trend |
Real-time status shows a downward trend. |
|
|
Blue double-sided arrow |
Stable trend |
Real-time status shows a stable trend. |
|
|
Green upward arrow |
Upward trend |
Real-time status shows an upward trend. |
History Status
The history status can display the worst status or the average status over a time period.
|
Icon |
Description |
Status |
Status Definition |
|---|---|---|---|
|
|
Small green circle with checkmark |
Historical OK |
All performance measurements fell within the OK threshold level over a time period up to the present. |
|
|
Small yellow triangle with exclamation mark |
Historical Minor |
At least one performance measurement fell within the Minor threshold level, but no measurements fell within the Major threshold level, over a time period up to the present. |
|
|
Small orange triangle with exclamation mark |
Historical Major |
At least one performance measurement fell within the Major threshold level, but no measurements fell within the Warning threshold level, over a time period up to the present. |
|
|
Small aqua triangle with exclamation mark |
Historical Warning |
At least one performance measurement fell within the Warning threshold level, but no measurements fell within the Critical threshold level, over a time period up to the present. |
|
|
Small red with "X" |
Historical Critical |
At least one performance measurement fell within the Critical threshold level, over a time period up to the present. |
Note When a CI has no history or trend data (for example, the CI status is uninitialized or stopped) or when history or trend data is not relevant for the CI's KPI, the history or trend icons are not displayed.
Calculation
Each KPI can include three icons: Status, Trend, and History.
History Calculation
The history status icon displays either the worst status or the average status for the CI's KPI during a specified time period.
The possible calculation methods are Worst (default value) or Average. Whichever calculation method is used, only status scores that have meaning (scores 0 to 20—the non-gray icons) are taken into consideration.
Note Status levels have a numerical code in service health.
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Worst. Takes the worst status over the period of time. Default time is 1 hour.
-
Average. Takes the average status over the period of time specified in the HistorySize parameter (Simple Moving Average). The calculation result is rounded to the nearest of the following values: 0, 5, 10, 15, or 20.
For example: if HistorySize is one hour (default value) and the KPI's values for the last hour are: 10, 10, 5, 0, -2, 20, the worst status is 0, so the history icon is red.
For example: if HistorySize is one hour and the KPI's values for the last hour are: 10, 10, 5, 0, -2, 20, the Average status is 10 (rounded from (10+10+5+0+20)/5=9), so the history icon is yellow.
Trend Calculation
The trend status icon shows the trend in real-time status for the CI KPI, using three directions: up, down, and no change.
Trend analysis is performed by comparing the Simple Moving Average (SMA) value for a long window with the SMA for a short window. If the short window SMA is higher than the long window SMA, the trend is considered to be up. If the long window SMA is higher, the trend is considered to be down. The SMA is calculated only on status scores that have meaning (scores 0 to 20—the non-gray icons).
-
Long window SMA. Based on the mean status of a KPI over the period of time. The default time is 1 hour.
-
Short window SMA. Based on the mean status of a KPI over the period of time defined by (TrendRate * HistorySize). The TrendRate parameter (default = 0.3) represents the time rate between the long and short window, and is defined in the hidden parameters.
Modifying the Trend and History Status Calculations
You can modify the way the trend and history statuses are calculated and displayed, by editing certain rule parameters. A rule parameter can be set as follows:
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Directly for a rule, so that it affects all CIs that use this rule.
Some parameters for trend and history statuses are predefined and can be viewed and edited in Business Rules; others are hidden, but can be manually added on the Repositories tab if you want to override the parameter default value.
Hidden Parameters
The history and trend statuses use the following hidden parameters. These are parameters with default values that are not visible to the user.
|
Name |
Default Value |
Description |
|---|---|---|
|
TrendRate |
0.3 |
Sets the time rate between the long window (period of time defined by the HistorySize parameter) and a short window. |