# Oracle 库常见问题排查

Oracle 库常见问题排查

查询数据库的相关信息

查看正在执行的语句

SELECT s.sid, s.serial#, s.username, s.status, s.sql_id, s.sql_child_number, sq.sql_text
FROM v$session s
JOIN v$sql sq ON s.sql_id = sq.sql_id
WHERE s.status = 'ACTIVE';

杀掉正在执行的sql

-- sid,serial#
alter system kill session '7114,14991'

查看未提交的事务

--SQL 语句 1：查询未提交事务 DML 语句
SELECT  S.SID
       ,S.SERIAL#
       ,S.USERNAME
       ,S.OSUSER 
       ,S.PROGRAM 
       ,S.EVENT
       ,TO_CHAR(S.LOGON_TIME,'YYYY-MM-DD HH24:MI:SS') 
       ,TO_CHAR(T.START_DATE,'YYYY-MM-DD HH24:MI:SS') 
       ,S.LAST_CALL_ET 
       ,S.BLOCKING_SESSION   
       ,S.STATUS
       ,( 
              SELECT Q.SQL_TEXT 
              FROM    V$SQL Q 
              WHERE  Q.LAST_ACTIVE_TIME=T.START_DATE 
              AND    ROWNUM<=1) AS SQL_TEXT   
FROM   V$SESSION S, 
       V$TRANSACTION T  
WHERE  S.SADDR = T.SES_ADDR;

查看锁表

SELECT
	sess.sid,
	sess.serial#,
	lo.oracle_username,
	lo.os_user_name,
	ao.object_name,
	lo.locked_mode
FROM
	v$locked_object lo,
	dba_objects ao,
	v$session sess
WHERE
	ao.object_id = lo.object_id
	AND lo.session_id = sess.sid;