IFCID 198 - Buffer Manager Page Access
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