Oracle中死事务的检查语句

SQL> SELECT KTUXEUSN, KTUXESLT, KTUXESQN, /* Transaction ID */

2 KTUXESTA Status, KTUXECFL Flags ,KTUXESIZ

3 FROM x$ktuxe

4 WHERE ktuxesta!='INACTIVE';

KTUXEUSN KTUXESLT KTUXESQN STATUS FLAGS KTUXESIZ

---------- ---------- ---------- ---------------- ------------------------ ----------

13 5 47447 ACTIVE DEAD 2819919

39 0 502 ACTIVE NONE 1

43 45 480 ACTIVE NONE 0

SQL> /

KTUXEUSN KTUXESLT KTUXESQN STATUS FLAGS KTUXESIZ

---------- ---------- ---------- ---------------- ------------------------ ----------

13 5 47447 ACTIVE DEAD 2819919<----该值没减小。

39 0 502 ACTIVE NONE 1

43 45 480 ACTIVE NONE 0

查询v$px_session和v$fast_start_servers,显示很多并行进程在rollback,根据以往的工程经验:

于是改为

SQL>alter system set fast_start_parallel_rollback=false scope=both;

之后,再次运行

SQL> SELECT KTUXEUSN, KTUXESLT, KTUXESQN,/* Transaction ID */

2 KTUXESTA Status, KTUXECFL Flags ,KTUXESIZ

3 FROM x$ktuxe

4 WHERE ktuxesta!='INACTIVE';

KTUXEUSN KTUXESLT KTUXESQN STATUS FLAGS KTUXESIZ

---------- ---------- -------------------------- ------------------------ ----------

13 5 47447 ACTIVE DEAD 2033516

35 29 502 ACTIVE NONE 1

SQL> /

KTUXEUSN KTUXESLT KTUXESQN STATUS FLAGS KTUXESIZ

---------- ---------- -------------------------- ------------------------ ----------

13 5 47447 ACTIVE DEAD 2033433<---该值不断变小。

35 29 502 ACTIVE NONE 1

使用如下脚本查看回滚完毕的预计时间(以天为单位):

SQL> set serveroutput on

SQL> declare

2 l_start number;

3 l_end number;

4 begin

5 select ktuxesiz into l_startfrom x$ktuxe where KTUXEUSN=13 and KTUXESLT=5;

6 dbms_lock.sleep(60);

7 select ktuxesiz into l_endfrom x$ktuxe where KTUXEUSN=13 and KTUXESLT=5;

8 dbms_output.put_line('time estDay:'|| round(l_end/(l_start -l_end)/60/24,2));

9 end;

10 /

time est Day:.21

24*0.21=5.04小时。即:预计5.04小时后回滚完毕。

另外注意:在其他环境使用时,请注意替换KTUXEUSN=13和KTUXESLT=5

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