When using channel devices to communicate with the Teradata Database, system performance is affected by the load on the block multiplexer channel connected to the Database.
For the best system performance, a channel that is used by the Teradata Database should be dedicated to devices to that Teradata Database. However, if research at your site indicates that a channel is not overloaded, the block multiplexer channel can be shared with other devices, such as disk or tape devices.
It is the responsibility of a site to monitor channel utilization to determine if it is high enough to degrade the performance on the Teradata Database. Note that an overloaded channel will result in I/O delays for other devices on that channel.