Data Link Control (DLC) Read and Write Queue Statistics workspace

The Data Link Control (DLC) Read and Write Queue Statistics workspace analyzes input at the Data Link Control (DLC) layer level providing z/OS Communications Server tuning statistics for the following types of interfaces on a z/OS v1.12 or later system:

Some OSA-Express features support up to eight read queues while HiperSockets supports only a single read queue. Data is provided for each read queue associated with the supported device or interface. There is one row of data returned for each of the one to four possible write priority queues that are supported for the datapath device number (data subchannel address) for each interface. When interfaces share a datapath device number (data subchannel address), the statistics for each interface sharing the datapath device will be identical.

Note: This workspace returns data only on systems running on z/OS v1.12 or later

This workspace can be displayed by clicking on the Link icon in the Interface Statistics Summary table in the Interface Statistics workspace or the Interface Status Summary table in the Interface Status workspace and selecting Data Link Control (DLC) Read and Write Queue Statistics from the list of available links. The link to this workspace is a conditional link and is displayed in the list of available links only if the value of the Interface Type attribute in the Interface Status workspace is one of the following types:

The Data Link Control (DLC) Read and Write Queue Statistics workspace provides the following views:

Data Link Control (DLC) Read Queue Statistics Summary table

The Data Link Control (DLC) Read Queue Statistics Summary table analyzes input at the Data Link Control (DLC) layer level providing z/OS Communications Server tuning statistics for the following types of interfaces on a z/OS v1.12 or later system:

Some OSA-Express features support up to eight read queues while HiperSockets supports only a single read queue. Data is provided for each read queue associated with the supported device or interface.

For a complete list of the attributes available in the Data Link Control (DLC) Read Queue Statistics Summary table, and a brief description of each, see the KN3 Interface Read Queue Attributes help panel.

See also:

Data Link Control (DLC) Write Queue Statistics Summary table

The Data Link Control (DLC) Write Queue Statistics Summary table displays output at the Data Link Control (DLC) layer level, providing information related to the datapath device number associated with the selected interface. Data is returned for each active OSA-Express queued direct I/O (QDIO) or HiperSocket datapath device number (data subchannel address). One row of data is returned for each of the one to four possible write priority queues that are supported for the datapath device number (data subchannel address) for each interface.

For a complete list of the attributes available in the Data Link Control (DLC) Write Queue Statistics Summary table, and a brief description of each, see the KN3 Interface Write Queue Attributes help panel.

See also: