These columns identify messages that are communicated through the Teradata net for coordination of a process among a group of vprocs. Coordination is handled either through semaphores, groups, or channels.
| Column Name | Mode | Description | Data Type |
|---|---|---|---|
| NetChanInUse | track | Number of channels in use at the current time. | FLOAT |
| NetChanInUseMax | max | Maximum number of channels in use. | FLOAT |
| MsgChnLastDone | count | Number of last done events that occurred on this node. The last AMP to finish an operation may send a last done broadcast message indicating the work is done for this step. This is used in tracking down the slowest node or AMP in the system. A node or AMP that has more last done messages than the others could be a bottleneck in the system performance.
|
FLOAT |
| NetGroupInUse | track | Number of groups in use at the current time. This number should be same across all nodes. | FLOAT |
| NetGroupInUseMax | max | Maximum number of groups in use during each log interval. | FLOAT |
| NetSemInUse | track | Number of semaphores in use at the current time. | FLOAT |
| NetSemInUseMax | max | Maximum number of semaphores in use during each log interval. | FLOAT |