AboutPeter Choi Expertise I am a senior Oracle DBA, PeopleSoft Administrator and Project Manager with
10 years experience. I have been working with PeopleSoft (HRMS 5, 7, 7.x and
8.9), Oracle RDBMS (7.3 - 10gR2) on various Unix and Windows platforms, and some Oracle Application Server (9i/10gR2). I also have experience with the configuration and administration of BEA`s Tuxedo and WebLogic for PeopleSoft 8.x.
Question how can i see which all transactions are consuming in undo tablespaces?
Answer Hi Chumki,
What you're looking for is the monitoring of the UNDO tablespaces.
The following dynamic performance views are useful for obtaining space information about the undo tablespace:
View Description
V$UNDOSTAT Contains statistics for monitoring and tuning undo space. Use this view to help estimate the amount of undo space required for the current workload. The database also uses this information to help tune undo usage in the system. This view is meaningful only in automatic undo management mode.
V$ROLLSTAT For automatic undo management mode, information reflects behavior of the undo segments in the undo tablespace
V$TRANSACTION Contains undo segment information
DBA_UNDO_EXTENTS Shows the status and size of each extent in the undo tablespace.
WRH$_UNDOSTAT Contains statistical snapshots of V$UNDOSTAT information. Please refer to Oracle Database 2 Day DBA for more information.
WRH$_ROLLSTAT Contains statistical snapshots of V$ROLLSTAT information. Please refer to Oracle Database 2 Day DBA for more information.
The following example shows the results of a query on the V$UNDOSTAT view.
SELECT TO_CHAR(BEGIN_TIME, 'MM/DD/YYYY HH24:MI:SS') BEGIN_TIME,
TO_CHAR(END_TIME, 'MM/DD/YYYY HH24:MI:SS') END_TIME,
UNDOTSN, UNDOBLKS, TXNCOUNT, MAXCONCURRENCY AS "MAXCON"
FROM v$UNDOSTAT WHERE rownum <= 144;
