These columns identify messages that are communicated through the Teradata Database 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.
|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|