IFCID 198 - Buffer Manager Page Access

Edit online

This topic shows detailed information about Record Trace - IFCID 198 - Buffer Manager Page Access.

Record trace - IFCID 198 - Buffer Manager Page Access

The field labels shown in the following sample layout of Record Trace - IFCID 198 - Buffer Manager Page Access are described in the following section. 

DBID        : DB2PM      PSID: PROCESS     BPID: X'00'
FUNCTION    : GET PAGE                                
PAGE STATUS : PAGE HIT IN BUFFERPOOL                  
ACCESS      : RANDOM     PAGE: X'00000001' ACE :     1
PAGE REFRESH: N/A                                     
PARTITION   :          0 PAGE NUMBERING: N/A
DBID

The database ID. Deduced from the Db2 fields QW0198DB, QW0105DN or QW0107DN.

When present, the database name is shown, otherwise the decimal identifier from QW0198DB is shown or N/A if this value is 0.

Field Name: RT0198OB

PSID

The page set object identifier. When present, this is the page set object name, otherwise the decimal identifier from QW0198OB is shown.

Field Name: RT0198PS

BPID

The buffer pool identifier.

Field Name: QW0198BP

FUNCTION

The page request function code.

Field Name: QW0198FC

PAGE STATUS

The page status in the buffer pool.

Field Name: QW0198PS

ACCESS

The page access type. This is only applicable if the value in FUNCTION is GET PAGE or RELEASE PAGE .

Field Name: QW0198AT

PAGE

The page number.

Field Name: QW0198PN

ACE

The relative number of the agent control element address in the ACE cross-reference table. This table is printed at the end of each location for every trace specified.

Field Name: QW0198AC

PAGE REFRESH
Page refresh status in case of a missed page in the virtual buffer pool. Possible values:
  • FROM GROUP BUFFER POOL
  • FROM DASD

Field Name: QW0198PR

PARTITION

The partition number. This field contains 0 if the request is non-partitioned.

Field Name: QW0198PT

PAGE NUMBERING
Indicates how page numbers are shown:
REL
Indicates that relative page numbers are shown in the partition.
ABS
Indicates that absolute page numbers are shown in the partition.
N/A
Not applicable.

Field Name: QW0198P1