Field values

This section explains the values stored in individual fields.

Data source

Each field stores a value acquired from Performance Management or monitoring target program, or a value computed from such a value based on a certain computation formula. The acquisition destination or computation method for each field value is shown under the Data source column.

If performance data acquired from UNIX is processed and set as a field value, the character string in PFM - Agent for Platform's Data source column shows the computation method for the value that is set in the field. For example, for the value of the Avg Wait Time (AVG_WAIT_TIME) field of the Device Detail (PI_DEVD) record, the value obtained by dividing the value of the Total Wait Time (TOTAL_WAIT_TIME) field by the value of the Total I/O Ops (TOTAL_OPS) field is stored.

Two hyphens (--) indicate that performance data is not processed and set as a field value.

Delta

Data expressed as an amount of change is called a delta. For example, if the performance data collected during the first interval is 3 and that collected during the second interval is 4, 1 is stored as the amount of change. Whether each field value is a delta is indicated under the Delta column in the field table.

The performance data collected by PFM - Agent for Platform varies as shown in the table below.

Real-time reports for which Indicate delta value is selected#, historical reports, and alarms
Record typeDeltaData sourceIs there any field that has delta = Yes in its data source column?Value displayed or value evaluated through alarm monitoring
PI record typeYesNo--Changed amount
YesNoChanged amount in the result computed based on the value at the time of collection
YesResult computed based on the changed amount
NoNo--Value at the time of collection
YesNoResult computed based on the value at the time of collection
YesResult computed based on the changed amount
PD record typeYesNo--Changed amount.
Accumulated value for a historical report or alarm of the Process Detail (PD) record
YesNo--
YesResult computed based on the changed amount.
Result computed based on the accumulated value for a historical report or alarm of the Process Detail (PD) record
NoNo--Value at the time of collection
YesNoResult computed based on the value at the time of collection
YesResult computed based on the changed amount.
Result computed based on the accumulated value for the Process Detail (PD) record
PL record typeNoNo--Differing-components information for each collection interval
Legend:
--: Not applicable
#
Indicates whether the following items in PFM - Web Console are selected:
  • Indicate delta value in the Indication settings (Realtime) window, which opens when Edit is chosen in the Report wizard
  • Indicate delta value under Indication settings (Realtime) under the Properties tab in the Report window
Real-time reports for which Indicate delta value is not selected#
Record typeDeltaData sourceIs there any field that has delta = Yes in its data source column?Displayed value
PI record typeYesNo--Accumulated value
YesNoResult computed based on the value at the time of collection
YesResult computed based on the accumulated value
NoNo--Value at the time of collection
YesNoResult computed based on the value at the time of collection
YesResult computed based on the accumulated value
PD record typeYesNo--Accumulated value
YesNo--
YesResult computed based on the accumulated value
NoNo--Value at the time of collection
YesNoResult computed based on the value at the time of collection
YesResult computed based on the accumulated value
PL record typeNoNo--Accumulated information since the service startup
Legend:
--: Not applicable
#
The following items in the dialog box in PFM - Web Console show whether Indicate delta value is selected:
  • Indicate delta value in the Indication settings (Realtime) window, which opens when Edit is chosen in the Report wizard
  • Indicate delta value under Indication settings (Realtime) under the Properties tab in the Report window
Example:
The Idle % field of the CPU - Per Processor Detail (PI_CPUP) record contains a PI-type record, and delta = No is set in this field. However, delta = Yes is set for the field indicated as the data source. Therefore, for real-time reports for which Indicate delta value is selected, historical reports, and alarms, a result computed based on the changed amount is displayed.

Note the following points about performance data collection:

Averages and percentages in individual fields

Some averages and percentages in individual fields are determined as values on a second-by-second basis, while others are determined according to the data collection interval. Unless otherwise specified, the values determined according to the data collection interval are used (if the interval is 60 seconds, data is collected every minute).

Interval field values

Interval field values vary according to the record type as shown in the table below.

Table 8-6 Interval field values

Record typeExplanation
PI record type
  • Real-time reports
    If Indicate delta value is selected for a real-time report, the first value is 0. Thereafter, the value is the same as the refresh interval that is set in the report. The value is computed using the following formula:
    interval-field-value = record-time-field-value - record-time-field-value-obtained-during-previous-collection-interval
    If Indicate delta value is not selected for a real-time report, the value obtained by subtracting the system startup time from the current time is used. The value is computed using the following formula:
    interval-field-value = record-time-field-value - system-startup-time
  • Historical reports
    The same value as the Collection Interval value. Computed using the following formula:
    interval-field-value = record-time-field-value - record-time-field-value-obtained-during-previous-collection-interval
PD record typeAlways 0.
PL record typeAlways 0.