4.5.6 Notes on when some service performance data has not been acquired
If service performance data has not been acquired for some periods and a report is displayed in the window, some limitations apply to display of the report data.
This subsection explains how report data is displayed in comprehensive evaluation tables and performance charts when some service performance data has not been acquired.
- Tip
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Limitations to the report data displayed in a comprehensive evaluation table and performance chart depend on the report interval. The available report intervals are one day, one week, one month, and three months, and their service performance acquisition intervals are different. The report interval is one month in the examples presented in (1) Comprehensive evaluation table that is displayed when some service performance data has not been acquired and (2) Performance chart that is displayed when some service performance data has not been acquired. This means that the interval at which service performance is acquired is one day. The values in comprehensive evaluation tables and performance charts are based on the interval at which service performance is acquired.
The table below shows the interval at which service performance is acquired for each report interval. Based on the specified report interval, replace the corresponding information provided in (1) Comprehensive evaluation table that is displayed when some service performance data has not been acquired and (2) Performance chart that is displayed when some service performance data has not been acquired with the correct information.
Table 4‒10: Display interval for each report interval No.
Report interval
Display interval
1
1 day
30 minutes
2
1 week
2 hours
3
1 month
1 day
4
3 months
1 day
- Organization of this subsection
(1) Comprehensive evaluation table that is displayed when some service performance data has not been acquired
If some of the service performance data has not been acquired, there are limitations to the data that is displayed in a comprehensive evaluation table. The limitations differ depending on the specified report interval. The table below describes the data that is displayed in a comprehensive evaluation table when the report interval is set to one month. For the data that is displayed when the report interval is one day, one week, or three months, see Hint, above.
|
No. |
Evaluation item |
Period for which data is missing |
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|---|---|---|---|---|
|
Less than one day |
At least one day but less than one month |
One month or more |
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|
1 |
Average value |
Displays the average value for the month, including days for which there is less than a full day's worth of data. If the number of days on which data has been acquired is less than the full month, the average value for the month is calculated from only the acquired data. |
Displays the average value for the month, excluding the missing days. |
Displays a hyphen (-). |
|
2 |
SLO compliance rate |
Displays the SLO compliance rate for the month, including the days for which there is less than one day's worth of data. |
Displays the SLO compliance rate for the month, excluding the missing days. |
|
|
3 |
Comparison to previous period (percentage)# |
Displays the comparison to the previous period of item 1 above. If data for the previous period has not been acquired, displays a hyphen (-). |
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The displayed table headers depend on the specified report interval. For the table header that is displayed for each report interval, see Table 4-4 Relationship between report interval and previous period to which percentage applies.
(2) Performance chart that is displayed when some service performance data has not been acquired
If some of the service performance data has not been acquired, there are limitations to the data that is displayed in a performance chart. The limitations differ depending on the specified report interval. The table below describes the data that is displayed in a performance chart when the report interval is set to one month. For the data that is displayed when the report interval is one day, one week, or three months, see Hint, above.
|
No. |
Type of line graph |
Period for which data is missing |
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|---|---|---|---|---|
|
Less than one day |
At least one day but less than one month |
One month or more |
||
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1 |
Threshold-value line |
The threshold for each day is plotted, including for the days with less than a full day's worth of data, and a line graph is drawn based on those values. |
The threshold for each day is plotted, excluding the missing days, and a line graph is displayed based on those values. |
Not displayed. |
|
2 |
Maximum-value line |
The maximum value of each day is plotted, including the days with less than a full day's worth of data, and a line graph is drawn based on those values. |
The maximum value for each day is plotted, excluding the missing days, and a line graph is displayed based on those values.#2 |
|
|
3 |
Average-value line |
The average value for each day is plotted, including the days with less than a full day's worth of data, and a line graph is drawn based on those values.#1 |
The average value for each day is plotted, excluding the missing days, and a line graph is displayed based on those values.#2 |
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4 |
Minimum-value line |
The minimum value for each day is plotted, including the days with less than a full day's worth of data, and a line graph is drawn based on those values. |
The minimum value for each day is plotted, excluding the missing days, and a line graph is displayed based on those values.#2 |
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- Note
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An average response time obtained when the average response time and throughput values are both 0 is treated as no data obtained. Therefore, it is not included in the average, maximum, and minimum values.
Similarly, an error rate obtained when the error rate and throughput values are both 0 is treated as no data obtained. Therefore, it is not included in the average, maximum, and minimum values.
- #1
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When using a day for which less than a full day's worth of data was acquired, the average value for that day is calculated using only the acquired data.
- #2
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A missing day is displayed as a gap in the line graph. If a day for which a full day's worth of data is available is both preceded and followed by a missing day, that day is displayed as a point.