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<----該值沒(méi)減小。 
39 0 502 ACTIVE NONE 1 
43 45 480 ACTIVE NONE 0

查詢v$px_session和v$fast_start_servers,顯示很多并行進(jìn)程在rollback，根據(jù)以往的工程經(jīng)驗(yàn)：

于是改為

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

之后，再次運(yùn)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<---該值不斷變小。 
35 29 502 ACTIVE NONE 1

使用如下腳本查看回滾完畢的預(yù)計(jì)時(shí)間（以天為單位）：

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小時(shí)。即：預(yù)計(jì)5.04小時(shí)后回滾完畢。

另外注意：在其他環(huán)境使用時(shí)，請(qǐng)注意替換KTUXEUSN=13和KTUXESLT=5

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