RE: Extra rows returned on V$transaction query.


Are you using autonomous transactions? They show up as different rows in
v$transaction.



From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Rob G
Sent: Monday, November 27, 2006 3:52 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: Extra rows returned on V$transaction query.




Hi all,



I was running a transaction and I was looking into v$transaction on the
usage of undo blocks.  While monitoring sometimes it returned 2 or 3
rows, but mostly one row. What do the second and third row represent in
this case:






12:33:35 SQL> select XIDUSN, START_TIME, SES_ADDR, NAME, USED_UBLK,
STATUS
12:34:18   2  from v$transaction
12:34:31   3  where SES_ADDR = 'BA7664FC';

    XIDUSN START_TIME           SES_ADDR
---------- -------------------- --------
NAME
------------------------------------------------------------------------
--------
 USED_UBLK STATUS
---------- ----------------
         8 11/26/06 11:49:25    BA7664FC

    127101 ACTIVE


12:34:52 SQL> /

    XIDUSN START_TIME           SES_ADDR
---------- -------------------- --------
NAME
------------------------------------------------------------------------
--------
 USED_UBLK STATUS
---------- ----------------
         8 11/26/06 11:49:25    BA7664FC

    127897 ACTIVE


12:35:10 SQL> /     /************* THREE ROWS RETURNED HERE
***********************************************/

    XIDUSN START_TIME           SES_ADDR
---------- -------------------- --------
NAME
------------------------------------------------------------------------
--------
 USED_UBLK STATUS
---------- ----------------
         8 11/26/06 12:35:13    BA7664FC

         0 INACTIVE

         8 11/26/06 11:49:25    BA7664FC

    128023 ACTIVE

         8 11/26/06 12:35:13    BA7664FC

         2 ACTIVE


12:35:13 SQL> l
  1  select XIDUSN, START_TIME, SES_ADDR, NAME, USED_UBLK, STATUS
  2  from v$transaction
  3* where SES_ADDR = 'BA7664FC'
12:35:20 SQL> /

    XIDUSN START_TIME           SES_ADDR
---------- -------------------- --------
NAME
------------------------------------------------------------------------
--------
 USED_UBLK STATUS
---------- ----------------
         8 11/26/06 11:49:25    BA7664FC

    128373 ACTIVE


12:35:21 SQL>



12:36:11 SQL> /   /************* TWO ROWS RETURNED HERE
***********************************************/

    XIDUSN START_TIME           SES_ADDR
---------- -------------------- --------
NAME
------------------------------------------------------------------------
--------
 USED_UBLK STATUS
---------- ----------------
         8 11/26/06 11:49:25    BA7664FC

    130772 ACTIVE

         8 11/26/06 12:36:11    BA7664FC

         3 ACTIVE


12:36:11 SQL>

Oracle is 9.2


--
Cheers,
Rob :)







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