Oracle問題診斷過程經常使用SQL

 

--查看臨時表空間使用狀況
select tablespace_name ,sum(size_mb),sum(used_mb),round(sum(used_mb)/sum(size_mb),2) from (
SELECT
dtf.tablespace_name ，
dtf.status AS "Status",
nvl(dtf.bytes / 1024 / 1024,0) AS Size_MB,
nvl(t.bytes_used / 1024 / 1024,0) AS Used_MB
FROM
sys.dba_temp_files dtf,
v$temp_extent_pool t
WHERE
dtf.file_id = t.file_id (+)
) group by tablespace_name

--查看當前sql語句執行狀況
select t1.USERNAME,t1.SADDR,t1.STATUS,t1.LAST_CALL_ET,t2.SQL_TEXT,t1.EVENT,t3.ELAPSED_TIME from v$session t1,v$sql t2,v$sqlstats t3 where t1.SQL_ID = t2.SQL_ID and
status ='ACTIVE' and t1.sql_id=t3.sql_id

--查看當前sql制定狀況plus版
SELECT
s.username 用戶名稱,
s.status 狀態,
s.machine 機器名稱,
s.osuser 操做系統用戶名稱,
spid unix進程號,
'kill -9 ' || p.spid unix級斷開鏈接,
'alter system kill session ' || '''' || s.sid || ','|| s.serial#|| ''';' oracle級斷開鏈接,
TO_CHAR(s.logon_time,'dd/mm/yyyy hh24:mi:ss') 登錄時間,
s.last_call_et 空閒時間秒,
s.module 模塊,
t.sql_text
FROM
v$session s,
v$process p,
v$sql t
WHERE
s.type = 'USER'
AND p.addr = s.paddr
AND status != 'KILLED'
AND s.sql_address = t.address
AND s.sql_hash_value = t.hash_value
AND s.last_call_et > 60 * 60 * 1
ORDER BY
s.last_call_et DESC