Deferred Requests Matrix - 16.20 - 16.50 - Deferred Requests Matrix - Teradata Viewpoint - Teradata Workload Management

Teradata® Viewpoint User Guide

Product
Teradata Viewpoint
Teradata Workload Management
Release Number
16.20
16.50
Release Date
July 2021
Content Type
User Guide
Publication ID
B035-2206-071K
Language
English (United States)

The following metrics can be displayed for deferred requests. The metrics are listed by the tabs on which they appear.

By Workload

This tab displays all queries that are currently deferred.

Metric Description
Account Account from which a query was submitted
Blocked Time How long the query has been blocked
Blocking Count Number of consecutive times a session has blocked at least one other session
CPU Use Percent of available CPU seconds on the system used during the last sampling period
Δ CPU Total CPU usage time consumed, in seconds, since the last sample
Delay Time Average time requests spends in the delay queue
Duration How long the query has been running
Host ID Host identifier or LAN identifier associated with the PE that processed the login request for the session
Hot AMP Spool (Teradata Database 16.0 and later) Current spool value of the highest spool utilized AMP for the query. If no request is running on the session, no value displays.
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.
In State How long the query has been in the current state
Δ I/O I/O count since the last sample
Meter Deferred Indicates whether any requests are deferred due to Arrival Rate Meter.
Partition Partition in which the query is running
PJI Ratio of the CPU milliseconds per I/O for the query, where a larger Product Join Index number indicates system performance degradation
Proxy Username (Teradata Database 15.10 and later) Name of the proxy user when a trusted session is used
Request CPU CPU seconds needed to run the query
Request Count Number of queries the session has executed
Request CPU Skew CPU skew for the current query
Request I/O Disk I/Os performed to run the query
Request I/O Skew I/O skew for the current query
Session ID Session identifier in which the query is running
Snapshot CPU Skew CPU skew during the last sample
Snapshot I/O Skew I/O skew during the last sample
Spool Spool space the query requires
Spool Skew (Teradata Database 16.0 and later) Current spool skew for the query. If no request is running on the session, no value displays.
Start Time that the query started running on Teradata Database
State Text describing the current state of the query
State Icon Icon representing the current state of the query
Temp Space Temp space used by the query
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
Username Name of the user who submitted the query
Virtual Partition Name of the virtual partition to which the workload belongs, for a SLES 11 system
Workload Workload to which the query belongs

By Meter

This tab displays all queries currently included in a Meter counter. A query that is included in a meter counter might still be executing; it is deferred only if the limit is exceeded.

Metric Description
Host ID Host identifier or LAN identifier associated with the PE that processed the login request for the session
IFP ID Identifier of the parsing engine vproc that initiated the request
Meter Deferred Indicates whether any requests are deferred due to Arrival Rate Meter.
Overridable Indicates whether the query can be aborted or released
Request Request number associated with the delayed request or session
Throttle Name Name of the throttle managing the query
Session ID Session identifier in which the query is running
Time Held The total number of seconds the request has been held
Username Name of the user who submitted the query

Meter Counts

This tab lists all currently active meters and their limits.

Metric Description
Active Query Count Number of active requests
Limit Concurrency limit set by the throttle
Meter Deferred Count Number of deferred requests.
Throttle Name Name of the active throttle