概述

ORACLE常用性能监控SQL【一】

总结常用的sql

查询Oracle正在执行的sql语句及执行该语句的用户

SELECT b.sid oracleID,b.username 登录Oracle用户名,b.serial#,
    spid 操作系统ID,paddr,sql_text 正在执行的sql,b.machine 计算机名
FROM v$process a,v$session b,v$sqlarea c
WHERE a.addr = b.paddr
  AND b.sql_hash_value = c.hash_value

或者

select a.username,a.sid,b.sql_TEXT,b.sql_FULLTEXT
 from v$session a,v$sqlarea b 
where a.sql_address = b.address

查询Oracle执行过的sql语句及执行该语句的用户

---执行过的
select b.sql_TEXT,b.FIRST_LOAD_TIME,b.sql_FULLTEXT from v$sqlarea b where b.FIRST_LOAD_TIME between '2016-10-1/09:24:47' and '2016-10-31/09:24:47' order by b.FIRST_LOAD_TIME

查看正在执行sql的发起者的发放程序

SELECT OSUSER 电脑登录身份,PROGRAM 发起请求的程序,USERNAME 登录系统的用户名,SCHEMANAME,B.cpu_Time 花费cpu的时间,STATUS,B.sql_TEXT 执行的sql FROM V$SESSION A LEFT JOIN V$sql B ON A.sql_ADDRESS = B.ADDRESS AND A.sql_HASH_VALUE = B.HASH_VALUE ORDER BY b.cpu_time DESC

查出oracle当前的被锁对象

SELECT l.session_id sid,s.serial#,
    l.locked_mode 锁模式,l.oracle_username 登录用户,l.os_user_name 登录机器用户名,s.machine 机器名,s.terminal 终端用户名,o.object_name 被锁对象名,s.logon_time 登录数据库时间
FROM v$locked_object l,all_objects o,v$session s
WHERE l.object_id = o.object_id
  AND l.session_id = s.sid
ORDER BY sid,s.serial#;

kill掉当前的锁对象可以为

alter system kill session 'sid， s.serial#‘;

查看占io较大的正在运行的session

SELECT se.sid,se.serial#,
       pr.SPID,se.username,se.status,se.terminal,se.program,se.MODULE,se.sql_address,st.event,st. p1text,si.physical_reads,si.block_changes
  FROM v$session se,v$session_wait st,v$sess_io si,v$process pr
 WHERE st.sid = se.sid
   AND st. sid = si.sid
   AND se.PADDR = pr.ADDR
   AND se.sid > 6
   AND st. wait_time = 0
   AND st.event NOT LIKE '%sql%'
 ORDER BY physical_reads DESC