Overview Tab - Teradata Viewpoint - 16.00

Teradata Viewpoint User Guide

prodname
Teradata Viewpoint
vrm_release
16.00
category
User Guide
featnum
B035-2206-106K

The Overview tab on the query details view displays five sections containing information about the selected query. The sections and the metrics each displays are shown below.

Query Information

Metric Description Type
Query ID System-wide unique ID that identifies the query String
Proc ID ID of the parsing engine that executed the query String
Start time The time the query was submitted Number
Statement type SQL statement type the query used String
Row count Number of result rows returned by the query Number
Active AMPs Number of AMPs involved in executing the query Number
Step count Number of steps in the query plan Number
Cache flag The cache flag types are:
  • T: The flag is found in step cache
  • S: The query is a parameterized query and a specific plan is generated.
  • G: The query is a parameterized query and a generic plan is generated.
  • A: The query is a parameterized query and a specific always decision is taken. Each time a query is submitted, the USING values are considered and the query is parsed.
String

Query Duration

Metric Description Type
Time active Number of seconds the query spent executing. Excludes any time the query was delayed before being executed. Number
Time delay Number of seconds the query was delayed before being executed Number
Total duration Total elapsed time it took for the query to execute once it was submitted Number

Query Performance

Metric Description Type
AMP CPU time Total number of CPU seconds consumed by AMPs in processing the query Number
Parser CPU time Total number of CPU seconds consumed by the parsing engine in processing the query Number
Total I/O count Total number of I/O requests the query used Number
Impact CPU Impact of jobs on the system taking CPU skew into account. The value is equal to the sum of the highest CPU time in seconds consumed by any one AMP on behalf of a job or query multiplied by the number of AMPs. Number
CPU skew CPU skew for the entire query Percent
I/O skew I/O skew for the entire query Percent
PJI Ratio of the CPU milliseconds per I/O for the query, where a larger Product Join Index number indicates system performance degradation Number
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 Number
Spool usage Amount of spool consumed by the query Number
Gating efficiency Percentage indicating the percentage of the overall query duration spent executing versus being delayed. A value of 100 indicates all time was spent executing. Percent
Burn rate Percentage of the overall system capacity effectively consumed by the query during its execution Percent
Time expansion Ratio of how long the query took to execute versus how long it could have ideally run. The larger the number, the more the execution time of the query was expanded. For example, a value of 8.8 means an expansion of 8.8 times the ideal execution time. Number

Workload Information

Metric Description Type
Starting workload Name of the workload under which the query started execution String
Final workload Name of the workload under which the query finished String

Session Information

Metric Description Type
Username Name of the user who submitted the query String
Application Name of the application that submitted the query String
Version Version of the application that submitted the query String
Account Account of the user who submitted the query String
App ID The ID of the application used to access the Teradata Database. Typically the App ID is the name and version of the Teradata Tool or Utility accessing Teradata Database. String
Client ID ID of the client that submitted the query String
Client address IP address of the client String