The Snapshot tab displays detailed query data for any point in time.
Metrics that exceed defined thresholds are highlighted.
| Query Information | Description |
|---|---|
| State | Query state, such as active, blocked, terminate |
| Time in State | How long the query has been in the current state, displayed as hh :mm :ss |
| Spool Space | Amount of spool space the query is using |
| Temp Space | Amount of temp space the query is using |
| CPU | Total CPU seconds needed to run the query, in seconds |
| CPU Use | Percent of available CPU seconds on the system used during the last sampling period |
| Impact CPU | CPU impact on the system based on the highest utilized AMP. (Teradata Database 15.0 and earlier) Calculated at the snapshot level. (Teradata Database 15.10 and later) Calculated at the request level. |
| I/O | Total number of disk I/Os performed |
| CPU Skew | CPU skew during the last sample |
| I/O Skew | I/O skew during the last sample |
| PJI | Ratio of the CPU milliseconds per I/O for the query, where a larger Product Join Index number indicates system performance degradation |
| Unnecessary I/O | All AMP I/O divided by all AMP CPU, displayed in milliseconds, to reveal large amounts of I/O occurring over a short period of time |
| Remote Data Imported | (Teradata Database 15.0 and later) Total bytes imported from a remote server for this query |
| Data Exported Remotely | (Teradata Database 15.0 and later) Total bytes exported to a remote server for this query |
| Workload Information | Description |
|---|---|
| Name | Name of the workload where the query is actively running |
| Method | Name of the workload management method in SLES 11. Available values are:
|
| CPU Decay | Most severe level of CPU resource access restriction for queries in a Timeshare workload in SLES 11 |
| CPU Exception Nodes | Number of nodes that exceeded the tactical CPU time exception criteria for the session in a Tactical workload in SLES 11 |
| Classification Mode | How a query or session is assigned to a workload. Available values are:
This field is empty if this is not a DBC/SQL session or if Teradata Workload Management Category 3 is disabled. |
| Virtual Partition | Name of the virtual partition in SLES 11 |
| I/O Decay | Most severe level of I/O resource access restriction for queries in a Timeshare workload in SLES 11 |
| I/O Exception Nodes | Number of nodes that exceeded the tactical I/O usage exception criteria for the session in a Tactical workload in SLES 11 |
| Time Marker | Description | Type |
|---|---|---|
| Time Location | Temporal location of the time marker within the Explain step | Number |
| Step Location | Explain step in which the time marker is located | Number |