检查Oracle中死事务的语句

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

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