Global storage buffer pool vector (X'000100030001')

The format of the global storage buffer pool vector is shown in Table 1. One global storage buffer pool vector is built for each buffer pool that exists in VTAM® per request for global storage usage data.

Table 1. Global buffer pool vector
Byte	Type	Description
8–11	EBCDIC, left-adjusted	Buffer pool ID name
12–13	binary	Size of each buffer
14–17	binary	Base number of buffers defined at VTAM initialization
18–21	binary	Total number of buffers currently defined
22–25	binary	Total number of buffers available
26–29	binary	Number of static buffers available
30–33	binary resettable	Maximum number of buffers in use since last reset
binary	Expansion size in terms of buffers. This value is the same as the number of buffers per extent.
36–39	binary	Expansion size in terms of bytes
40–41	binary	Expansion threshold Note: If value is X'FFFF', pool is not eligible for expansion.
42–45	binary	Expansion limit
46–47	binary	Contraction threshold Note: If value is X'7FFF', pool has no expansion extents.
48–51	binary rolling counter	Number of expansions
52–55	binary	Slowdown threshold
56–59	binary	Number of queued requests (RPHs)
60–63	binary	Number of buffers needed to satisfy queued requests
64–67	binary resettable	Maximum number of requestors waiting since last reset
68–71	binary resettable	Maximum number of bytes allocated since last reset
72–73	binary	Pool attribute flags First byte Bit setting B'.1.. ....' Fixed storage B'..1. ....' Pool resides in fetch protected storage B'.... 1...' Storage allocated below 24-bit line Second byte B'1... ....' User request fixed buffer Bits not shown are reserved.
74–75	binary	Subpool number
76–77	binary	User-specified base number of buffers (BASENO)
78–79	binary	User-specified number of expand buffers (XPANNO)
80–83	binary	Number of active extents
84–87	binary	Number of available buffers in extents