These columns report statistics about the AMP Worker Tasks.
| Column Name | Mode | Description | Data Type |
|---|---|---|---|
| Available | track | Number of unreserved AMP Worker Tasks from the pool that are not being used at the end of the interval. For example, if 12 of the normally 56 unreserved AMP Worker Tasks are removed from the pool by reserving them for expedited work, there could at most be 44 unreserved AMP Worker Tasks available. If in this log period, 10 unreserved AMP Worker Tasks are taken from the pool to service 10 queries that are still executing, there would be only 34 available at the end of the log period. |
FLOAT |
| AvailableMin | min | Minimum number of unreserved AMP Worker Tasks available in the pool for each AMP for the logged period. For example, a zero value means there were no unreserved AMP Worker Tasks available in the pool at some point during the reporting period. |
FLOAT |
| AvailableForWork00 | track | Unused limit of AWTs for work type 00 at end period. For example, if the limit is 50 AWTs for work type 00, and 4 AWTs are in use for work type 00, this field contains (50-4) = 46. | FLOAT |
| AvailableForWork08 | track | Unused limit of AWTs for work type 08 at end period. For example, if the limit is 50 AWTs for work type 08, and 4 AWTs are in use for work type 08, this field contains (50-4) = 46. | FLOAT |
| AvailableForWork00Min | min | The minimum value of AvailableForWork00 over the entire period. | FLOAT |
| AvailableForWork08Min | min | The minimum value of AvailableForWork08 over the entire period. | FLOAT |
| AWTsConfigured | const | Current setting for AMP Worker Task (for example, 80, 100, or so on) in the DBS Control MaxLoadAWT field. For more information, see “MaxLoadAWT” in Teradata Vantage™ - Database Utilities , B035-1102 . | FLOAT |
| FlowControlled | track | Specifies if an AMP is in flow control. If the value is non-zero, the AMP is in flow control. Resource usage indicates flow control on work mailbox name 2-11 only. Work mailbox name 2-11 is the incoming mailbox for AMPs, where 2 is the mailbox number and 11 is the AMP Worker Task partition. However, resource usage indicates flow control on work mailbox name 2-11 for all work types. For example, if any work type is in flow control, the system is in flow control. |
FLOAT |
| FlowCtlCnt | count | Number of times during the log period that the system entered the flow control state from a non-flow controlled state. | FLOAT |
| FlowCtlTime | count | Total time, in milliseconds, that an AMP is in flow control. | FLOAT |
| InuseMax | max | Maximum number of AMP Worker Tasks in use at any one time during the log period. | FLOAT |
| MailBoxDepth | track | Current depth of the AMP work mailbox at the end of the period. | FLOAT |
| UnReservedAwtPoolSize | const | Total number of AWTs in the unreserved AWT pool. | |
| WorkTypeInuse00 -WorkTypeInuse15 | track | Current number of AMP Worker Tasks in use during the log period for each work type for the VprId vproc. The WorkTypeInuse04 column value is always at least 1 due to the internal database design for the Control AMP rows in the ResUsageSawt table.
|
FLOAT |
| WorkTypeMax00 - WorkTypeMax15 | max | Maximum number of AMP Worker Tasks in use at one time during the log period for each work type for the VprId vproc. In Summary Mode, the WorkTypeMax column values are the Max of the values for all the AMPS. |
FLOAT |
| WorkTypeAWTExhausted00 - WorkTypeAWTExhausted15 | count | Number of times a work message cannot be assigned to an AWT. This is caused when no AWT is available in the available pool, or when the number of AWTS in use for the work type reaches its limits. | FLOAT |