The VTAM(R) Buffer Pool Extents workspace displays the characteristics and status of the buffer pool extents. When VTAM expands the buffer pool, it creates an extent by first allocating a Pool Extension Block (PXB), which anchors the extent and contains its starting address. The workspace shows how many buffers and pages are contained in each extent.
VTAM calculates these numbers by taking the expansion number and rounding it up to the next full page of buffers. For example, if 30 buffers will fit on one page of storage and the expansion number is specified as 31, each extent will contain 2 pages of 30 buffers.
The VTAM Buffer Pools Extents workspace is displayed by right-clicking on the Link icon in the VTAM Buffer Pools Summary table and selecting VTAM Buffer Pool Extents.
This workspace displays the following views:
The VTAM Buffer Pool Extents Summary table contains summary data for all currently allocated VTAM buffer pool extents for the specified buffer pool.
For a complete list of the attributes available in the VTAM Buffer Pool Extents Summary table, and a brief description of each, see the VTAM Buffer Pool Extents Attributes help panel.
See also: