Group Buffer Pool Activity

This topic shows detailed information about Accounting - Group Buffer Pool Activity.

This block is printed for each active group buffer pool. When there is more than one active group buffer pool, a totals block is printed for each aggregation.

The following example shows both layouts, the report on the left, and the trace layout on the right.

Accounting - Group Buffer Pool Activity

The field labels shown in the following sample layout of Accounting - Group Buffer Pool Activity are described in the following section.


Report:                                  Trace:

GROUP BP1                AVERAGE         GROUP BP0                 TOTAL
----------------------  --------         ---------------------  --------
GBP-DEPEND GETPAGES       0.00           GBP-DEPEND GETPAGES          0
READ(XI)-DATA RETUR       0.00           READ(XI)-DATA RETUR          0
READ(XI)-NO DATA RT       0.00           READ(XI)-NO DATA RT          0
READ(NF)-DATA RETUR       0.00           READ(NF)-DATA RETUR          0
READ(NF)-NO DATA RT       0.00           READ(NF)-NO DATA RT          0
PREFETCH PAGES READ       0.00           PREFETCH PAGES READ          0
CLEAN PAGES WRITTEN       0.00           CLEAN PAGES WRITTEN          0
UNREGISTER PAGE           0.00           UNREGISTER PAGE              0
ASYNCH GBP REQUESTS       0.00           ASYNCH GBP REQUESTS          0
EXPLICIT X-INVALID        0.00           EXPLICIT X-INVALID           0
ASYNCH SEC-GBP REQ        0.00           ASYNCH SEC-GBP REQ           0
PG P-LOCK LOCK REQ        0.00           PG P-LOCK LOCK REQ           0
 SPACE MAP PAGES          0.00            SPACE MAP PAGES             0
 DATA PAGES               0.00            DATA PAGES                  0
 INDEX LEAF PAGES         0.00            INDEX LEAF PAGES            0
PG P-LOCK UNLOCK REQ      0.00           PG P-LOCK UNLOCK REQ         0
PG P-LOCK LOCK SUSP       0.00           PG P-LOCK LOCK SUSP          0
 SPACE MAP PAGES          0.00            SPACE MAP PAGES             0
 DATA PAGES               0.00            DATA PAGES                  0
 INDEX LEAF PAGES         0.00            INDEX LEAF PAGES            0
WRITE AND REGISTER        0.00           WRITE AND REGISTER           0
WRITE & REGISTER MULT     0.00       WRITE & REGISTER MULT        0
CHANGED PAGES WRITTEN     0.00           CHANGED PAGES WRITTEN        0
COMPL CHECKS SUSPEND      0.00           COMPL CHECKS SUSPEND         0

GBP-DEPEND GETPAGES

The number of coupling facility READ requests required because the buffer was marked invalid. Data is returned from the group buffer pool.

Field Name: QBGAGG

READ(XI)-DATA RETUR

The number of coupling facility read requests required because the buffer was marked invalid. Data is returned from the group buffer pool.

Field Name: QBGAXD

READ(XI)-NO DATA RT

The number of synchronous coupling facility read requests necessary because the buffer was marked invalid. Data is not returned from the group buffer pool.

Field Name: ABGAXR

This is an exception field.

READ(NF)-DATA RETUR

The number of coupling facility read requests necessary because the requested page was not found in the buffer pool. Data is returned from the coupling facility.

Field Name: QBGAMD

This is an exception field.

READ(NF)-NO DATA RT

The number of synchronous coupling facility read requests necessary because the requested page was not found in the buffer pool. Data is not returned from the coupling facility.

Field Name: ABGAMR

This is an exception field.

PREFETCH PAGES READ

The number of pages read from the group buffer pool due to prefetch under the control of the agent.

Field Name: QBGAMN

This is an exception field.

CLEAN PAGES WRITTEN

The number of clean pages written to the group buffer pool.

Field Name: QBGAWC

This is an exception field.

UNREGISTER PAGE

The number of coupling facility requests to unregister a page.

Field Name: QBGADG

This is an exception field.

ASYNCH GBP REQUESTS

The number of asynchronous IXLCACHE invocations for the primary group buffer pool.

Field Name: QBGAHS

EXPLICIT X-INVALID

The number of times an explicit coupling facility cross-invalidation request was issued.

Field Name: QBGAEX

ASYNCH SEC-GBP REQ

The number of IXLCACHE invocations for the secondary group buffer pool.

Field Name: QBGA2H

PG P-LOCK LOCK REQ

The number of all page P-lock lock requests.

Field Name: ABGAPLR

SPACE MAP PAGES

The number of page P-lock lock requests for space map pages.

Field Name: QBGAP1

DATA PAGES

The number of page P-lock lock requests for data pages.

Field Name: QBGAP2

INDEX LEAF PAGES

The number of page P-lock lock requests for index-leaf pages.

Field Name: QBGAP3

PG P-LOCK UNLOCK REQ

The number of page P-lock unlock requests.

Field Name: QBGAU1

PG P-LOCK LOCK SUSP

The sum of all page P-lock lock suspensions.

Field Name: ABGAPLS

SPACE MAP PAGES

The number of page P-lock suspensions for space-map pages.

Field Name: QBGAS1

DATA PAGES

The number of page P-lock lock suspensions for data pages.

Field Name: QBGAS2

This is an exception field.

INDEX LEAF PAGES

The number of page P-lock lock suspensions for index-leaf pages.

Field Name: QBGAS3

WRITE AND REGISTER

The number of Write and Register (WAR) requests.

Field Name: QBGAWS

WRITE & REGISTER MULT

The number of write and register multiple (warm) requests.

Field Name: QBGAWM

CHANGED PAGES WRITTEN

The number of changed pages written to the group buffer pool as a result of write and register (WAR), or write and register multiple (WARM) requests.

Field Name: QBGASW

This is an exception field.

WRITE TO SEC-GBP

The number of requests to write changed pages to the secondary GBP for duplexing.

Field Name: QBGA2W

COMPL CHECKS SUSPEND

The number of completion checks for writes to the secondary GBP that were suspended because the write had not yet been completed.

Field Name: QBGA2S