Reference: http://blog.csdn.net/xiaoxu0123/article/details/38846685
Reference: http://blog.sina.com.cn/s/blog_4a80a5730101oxnk.html
Reference: http://blog.csdn.net/fycghy0803/article/details/16845575
ORACLE中可以通過v$session表查看當前有效的session信息,並且可以通過v$session的sql_id或sql_address通過關聯查詢v$sql查看當前正在執行的sql語句;
如果想查看session近期執行的sql語句,可以通過v$active_session_history表中的sql_id查看近期歷史執行的sql語句,要求數據庫的liberary沒有被fresh。
SELECT b.sql_text, --content of SQL
a.machine, --which machine run this code
a.username, a.module, -- the method to run this SQL
c.sofar / totalwork * 100, --conplete percent
c.elapsed_seconds, --run time
c.time_remaining --remain to run time
FROM v$session a, v$sqlarea b, v$session_longops c
WHERE a.sql_hash_value = b.hash_value(+) AND a.SID = c.SID(+)
AND a.serial# = c.serial#(+)
--AND a.sid=139
Oracle 最近執行過的sql語句:
SELECT sql_text, last_load_time
FROM v$sql
WHERE last_load_time IS NOT NULL
ORDER BY last_load_time DESC
其它,
SELECT sql_text,last_load_time FROM v$sql order by last_load_time desc;
SELECT sql_text, last_load_time FROM v$sql WHERE last_load_time IS NOT NULL and sql_text like 'select%' ORDER BY last_load_time DESC;
SELECT sql_text, last_load_time FROM v$sql WHERE last_load_time IS NOT NULL and sql_text like 'update%' ORDER BY last_load_time DESC;
SELECT sql_text, last_load_time FROM v$sql WHERE last_load_time IS NOT NULL and last_load_time like' 14-06-09%' ORDER BY last_load_time DESC;
監控concurrent 正在執行的sql
SELECT a.sid, a.serial#, b.sql_text
FROM v$session a, v$sqltext b
WHERE a.sql_address = b.address
--AND a.sid = <...>
ORDER BY b.piece
正在執行的
SELECT a.username, a.sid,b.SQL_TEXT, b.SQL_FULLTEXT
FROM v$session a, v$sqlarea b
where a.sql_address = b.address
執行過的
SELECT b.SQL_TEXT,b.FIRST_LOAD_TIME,b.SQL_FULLTEXT
FROM v$sqlarea b
WHERE b.FIRST_LOAD_TIME between '2009-10-15/09:24:47' and
'2009-10-15/09:24:47' order by b.FIRST_LOAD_TIME
(此方法好處可以查看某一時間段執行過的sql,並且 SQL_FULLTEXT 包含了完整的 sql 語句)
其他
SELECT OSUSER,PROGRAM,USERNAME,SCHEMANAME,B.Cpu_Time,STATUS,B.SQL_TEXT
FROM V$SESSION A LEFT JOIN V$SQL B ON A.SQL_ADDRESS=B.ADDRESS AND A.SQL_HASH_VALUE=B.HASH_VALUE ORDER BY b.cpu_time desc
SELECT address, sql_text, piece
FROM v$session, v$sqltext
WHERE address = sql_address
-- and machine = < you machine name >
ORDER BY address, piece
查找前十條性能差的sql
SELECT * FROM (SELECT PARSING_USER_ID,EXECUTIONS,SORTS,
COMMAND_TYPE,DISK_READS,sql_text FROM v$sqlarea
ORDER BY disk_reads DESC )WHERE ROWNUM<10 ;
查看佔io較大的正在運行的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