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.
Record type | Delta | Data source | Is there any field that has delta = Yes in its data source column? | Value displayed or value evaluated through alarm monitoring |
---|---|---|---|---|
PI record type | Yes | No | -- | Changed amount |
Yes | No | Changed amount in the result computed based on the value at the time of collection | ||
Yes | Result computed based on the changed amount | |||
No | No | -- | Value at the time of collection | |
Yes | No | Result computed based on the value at the time of collection | ||
Yes | Result computed based on the changed amount | |||
PD record type | Yes | No | -- | Changed amount. Accumulated value for a historical report or alarm of the Process Detail (PD) record |
Yes | No | -- | ||
Yes | Result 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 | |||
No | No | -- | Value at the time of collection | |
Yes | No | Result computed based on the value at the time of collection | ||
Yes | Result computed based on the changed amount. Result computed based on the accumulated value for the Process Detail (PD) record | |||
PL record type | No | No | -- | Differing-components information for each collection interval |
Record type | Delta | Data source | Is there any field that has delta = Yes in its data source column? | Displayed value |
---|---|---|---|---|
PI record type | Yes | No | -- | Accumulated value |
Yes | No | Result computed based on the value at the time of collection | ||
Yes | Result computed based on the accumulated value | |||
No | No | -- | Value at the time of collection | |
Yes | No | Result computed based on the value at the time of collection | ||
Yes | Result computed based on the accumulated value | |||
PD record type | Yes | No | -- | Accumulated value |
Yes | No | -- | ||
Yes | Result computed based on the accumulated value | |||
No | No | -- | Value at the time of collection | |
Yes | No | Result computed based on the value at the time of collection | ||
Yes | Result computed based on the accumulated value | |||
PL record type | No | No | -- | Accumulated information since the service startup |
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 type | Explanation |
---|---|
PI record type |
|
PD record type | Always 0. |
PL record type | Always 0. |