数据库用户在数据库中truncate表时，常常会出现ora-00054:resource busy and acquire with nowait specified这样的错误。主要是因为有事务正在执行（或者事务已经被锁），所有导致执行不成功。
1、用sysdba权限的用户查看数据库都有哪些锁
SQL> select t2.username,t2.sid,t2.serial#,t2.logon_time
2 from v$locked_object t1,v$session t2
3 where t1.session_id=t2.sid order by t2.logon_time;
USERNAME SID
------------------------------------------------------------ ----------
SERIAL# LOGON_TIME
---------- -------------------
ATM 19
359 2010-05-24 10:23:56
2。 根据sid查看具体的sql语句，如果sql不重要，可以kill
SQL> select sql_text from v$session a,v$sqltext_with_newlines b
2 where DECODE(a.sql_hash_value, 0, prev_hash_value, sql_hash_value)=b.hash_value
3 and a.sid=&sid order by piece;
Enter value for sid: 19
old 3: and a.sid=&sid order by piece
new 3: and a.sid=19 order by piece
SQL_TEXT
--------------------------------------------------------------------------------
insert into atm1_collectconfiglog (id,collecttype,collectdate,co
llectdataid,collectdataname,collectaction,collectcontent) values
((select decode(max(id)+1,'','1',max(id)+1) from atm1_collectco
nfiglog),'ATM1_Circuit',sysdate,'439612','BJ3G_s5p5_vp3c123-FJXM
1B2_s7p5_d123_CCS','update','更新：电路ID439612,更新电路名称:BJ3
G_s5p5_vp3c123-FJXM1B2_s7p5_d123_CCS,更新电路带宽:262144')
6 rows selected.
3、kill该事务
SQL> alter system kill session '19,359';
alter system kill session '19,359'
*
ERROR at line 1:
ORA-00031: session marked for kill
不行，需要这样做：
SQL>select 'kill -9 ' ||SPID|| from v$process where addr in (select PADDR from v$session where sid=&sid and SERIAL#=&serial);
后执行
SQL> truncate table atm.atm1_collectconfiglog;
Table truncated.
