Question & Answer
Question
How do I view statistical data on VTAM's Enterprise Extender-specific buffer pools?
Answer
VTAM has three Enterprise Extender-specific buffer pools:
TIBUF (also known as TI00)
T1BUF (also known as T100)
T2BUF (also known as T200)
TIBUF is used to perform input/output operations for CSM-capable protocols. This pool is in 31-bit storage.
T1BUF buffers are similar to TIBUF buffers but larger. T1BUF buffers are used as packing buffers by HiperSockets accelerator and QDIO. T1BUF buffers are also used to contain the HPR headers and the media, IP, and UDP headers for an Enterprise Extender connection.
T2BUF buffers are similar to T1BUF buffers but larger. T2BUFs are used exclusively for HiperSockets accelerator and QDIO when the T1BUF buffer is perceived to be of insufficient size to pack all the headers and data. T2BUF buffers are also used by HPR for all retransmissions over HiperSockets and QDIO.
To display statistics for those three pools, enter the command d net,bfruse,buf=(ti,t1,t2).
The types of statistics displayed are:
BUFF SIZE: the number of bytes in each buffer
EXP INCREMENT: the number of buffers to be added to the pool during dynamic expansion
TIMES EXP: the number of times the pool has been expanded since the last buffer pool trace record was written
EXP/CONT THRESH: a value indicating when to trigger expansion / a value indicating when to trigger contraction
CURR TOTAL: the total number of buffers in the pool
CURR AVAILABLE: the available buffers in the pool that are not in use
MAX TOTAL: the maximum number of buffers contained in the pool at any one time since the last buffer pool trace record was written
MAX USED: the maximum number of buffers that have been in use at one time since the last buffer pool trace record was written
An example of output from that command is shown below:
IST097I DISPLAY ACCEPTED
IST350I DISPLAY TYPE = BUFFER POOL DATA
IST920I TI00 BUFF SIZE 632 EXP INCREMENT 60
IST921I TIMES EXP 0 EXP/CONT THRESH 120 / *NA*
IST922I CURR TOTAL 360 CURR AVAILABLE 85
IST923I MAX TOTAL 360 MAX USED 302
IST924I -------------------------------------------------------------
IST920I T100 BUFF SIZE 1004 EXP INCREMENT 32
IST921I TIMES EXP 3 EXP/CONT THRESH 15 / 111
IST922I CURR TOTAL 112 CURR AVAILABLE 112
IST923I MAX TOTAL 112 MAX USED 69
IST924I -------------------------------------------------------------
IST920I T200 BUFF SIZE 2028 EXP INCREMENT 32
IST921I TIMES EXP 406920 EXP/CONT THRESH 7 / 103
IST922I CURR TOTAL 104 CURR AVAILABLE 104
IST923I MAX TOTAL 1608 MAX USED 1576
IST314I END
Product Synonym
ZOSCS COMMSERVER
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Document Information
Modified date:
02 June 2015
UID
dwa1194329