The VTAM(R) Buffer Usage by Category workspace displays the usage of the IO buffer pool based on its contents.
The IO buffer pool manages the storage of all network input/output messages sent from application programs and across channel connections. All network traffic passes through this pool, regardless of its destination. This buffer pool also contains channel programs used to service locally attached devices. Because a great deal of activity takes place in IO00, it is very sensitive to dynamic fluctuations in traffic rates. Consequently, it is a prime candidate for tuning.
Examining the contents of this buffer pool can help a network capacity planner plan for more CSA, understand how applications are using the pool, and understand the network traffic activity. The values reported in these tables are obtained by processing the contents of the buffers themselves and the VTAM control blocks are examined to determine which of the two categories each of the buffers in the IO pool is to be associated with.
This workspace is displayed by right-clicking on the Link icon in the VTAM Buffer Pools Summary table and selecting VTAM Buffer Usage By Category.
This workspace displays the following views:
The Usage by Application for Address Space Summary Table displays a table showing collection time, description, and percentage of usage for each buffer type in User Category.
Click the Link icon in this workspace to display the VTAM Buffer Usage by Application for Address Space Workspace. This link is available for IO00 buffer pools only.
For a complete list of the attributes available in the Usage by User Category Summary Table, and a brief description of each, see the VTAM Buffer Usage By Category Attributes help panel.
The Usage by Application for Address Space Summary Table displays a table showing collection time, description, and percentage of usage for each buffer type in User Category 2.
Click the Link icon in this workspace to display the VTAM Buffer Usage by Application for Address Space Workspace. This link is available for IO00 buffer pools only.
For a complete list of the attributes available in the Usage by User Category Summary Table, and a brief description of each, see the VTAM Buffer Usage By Category Attributes help panel.
See also: