DB2 UDB for z/OS Version 8 Performance Topics - IBM Redbooks

--------------------------- -------- ------- ------- -------
IDENTIFY 0 0.00 0.00 0.00
CREATE THREAD 2 261.75 1.00 1.00
SIGNON 0 0.00 0.00 0.00
TERMINATE 2 261.75 1.00 1.00
ROLLBACK 0 0.00 0.00 0.00
COMMIT PHASE 1 0 0.00 0.00 0.00
COMMIT PHASE 2 0 0.00 0.00 0.00
READ ONLY COMMIT 0 0.00 0.00 0.00
UNITS OF RECOVERY INDOUBT 0 0.00 0.00 0.00
UNITS OF REC.INDBT RESOLVED 0 0.00 0.00 0.00
SYNCHS(SINGLE PHASE COMMIT) 2 261.75 1.00 1.00
QUEUED AT CREATE THREAD 0 0.00 0.00 0.00
SUBSYSTEM ALLIED MEMORY EOT 0 0.00 0.00 0.00
SUBSYSTEM ALLIED MEMORY EOM 0 0.00 0.00 0.00
SYSTEM EVENT CHECKPOINT 0 0.00 0.00 0.00
HIGH WATER MARK IDBACK 1 130.87 0.50 0.50
HIGH WATER MARK IDFORE 1 130.87 0.50 0.50
HIGH WATER MARK CTHREAD 1 130.87 0.50 0.50
In addition, the high water mark for MAXDBAT and CONDBAT are listed in the enhanced DB2
PE Statistics reports, under the DRDA Remote Locations section.
Package information added to deadlock trace records
When a deadlock (IFCID 172) occurs, DB2 now adds package and DBRM related information
about the holder and blocker that allows you to identify the culprit and victims more easily. The
following information is added for both the blockers and holders of the locks involved in the
deadlock:
► Location name
► Collection name
► Program or package name
► Consistency token
This information is also available from DB2 PE, as shown in Example 4-5.
Example 4-5 Enhances deadlock trace record
LOCATION: PMODB2A DB2 PERFORMANCE EXPERT (V2) PAGE: 1-3
GROUP: N/A RECORD TRACE - LONG REQUESTED FROM: NOT SPECIFIED
MEMBER: N/A TO: NOT SPECIFIED
SUBSYSTEM: SDA1 ACTUAL FROM: 04/16/04 09:53:59.42
DB2 VERSION: V8 PAGE DATE: 04/16/04
PRIMAUTH CONNECT INSTANCE END_USER WS_NAME TRANSACT
ORIGAUTH CORRNAME CONNTYPE RECORD TIME DESTNO ACE IFC DESCRIPTION DATA
PLANNAME CORRNMBR TCB CPU TIME ID
-------- -------- ----------- ----------------- ------ --- --- -------------- ------------------------------------------------------
N/P N/P 00BB46094741 N/P N/P N/P
N/P N/P 'BLANK' 09:53:59.43270268 103075 3 172 DEADLOCK DATA NETWORKID: G998C442 LUNAME: HF05 LUWSEQ: 1
N/P N/P N/P
|-------------------------------------------------------------------------------------------------------------------------
| DEADLOCK HEADER
|INTERVAL COUNT: 152949 WAITERS INVOLVED: 2 TIME DETECTED: 04/16/04 09:53:59.424504
|.........................................................................................................................
| UNIT OF WORK
| R E S O U R C E
|LOCK RES TYPE: PAGESET LOCK DBID: DSNDB06 OBID: SYSDBASE
|LOCK HASH VALUE: X'00000906'
| B L O C K E R
206 DB2 UDB for z/OS Version 8 Performance Topics