DBA³£ÓÃsql(Ò»)

--¼à¿ØË÷ÒýÊÇ·ñʹÓà alter index &index_name monitoring usage; alter index &index_name nomonitoring usage; select * from v$object_usage where index_name = &index_name;
--ÇóÊý¾ÝÎļþµÄI/O·Ö²¼ select df.name,phyrds,phywrts,phyblkrd,phyblkwrt,singleblkrds,readtim,writetim from v$filestat fs,v$dbfile df where fs.file#=df.file# order by df.name;
--Çóij¸öÒþ²Ø²ÎÊýµÄÖµ col ksppinm format a54 col ksppstvl format a54 select ksppinm, ksppstvl from x$ksppi pi, x$ksppcv cv where cv.indx=pi.indx and pi.ksppinm like '_%' escape '' and pi.ksppinm like '%meer%';
--ÇóϵͳÖнϴóµÄlatch select name,sum(gets),sum(misses),sum(sleeps),sum(wait_time) from v$latch_children group by name having sum(gets) > 50 order by 2;
--Çó¹éµµÈÕÖ¾µÄÇл»ÆµÂÊ(Éú²úϵͳ¿ÉÄÜʱ¼ä»áºÜ³¤) select start_recid,start_time,end_recid,end_time,minutes from (select test.*, rownum as rn from (select b.recid start_recid,to_char(b.first_time,'yyyy-mm-dd hh24:mi:ss') start_time, a.recid end_recid,to_char(a.first_time,'yyyy-mm-dd hh24:mi:ss') end_time,round(((a.first_time-b.first_time)*24)*60,2) minutes from v$log_history a,v$log_history b where a.recid=b.recid+1 and b.first_time > sysdate - 1 order by a.first_time desc) test) y where y.rn < 30
--Çó»Ø¹ö¶ÎÕýÔÚ´¦ÀíµÄÊÂÎñ select a.name,b.xacts,c.sid,c.serial#,d.sql_text from v$rollname a,v$rollstat b,v$session c,v$sqltext d,v$transaction e where a.usn=b.usn and b.usn=e.xidusn and c.taddr=e.addr and c.sql_address=d.address and c.sql_hash_value=d.hash_value order by a.name,c.sid,d.piece;
--Çó³öÎÞЧµÄ¶ÔÏó select 'alter procedure '||object_name||' compile;' from dba_objects where status='INVALID' and wner='&' and object_type in ('PACKAGE','PACKAGE BODY'); / select owner,object_name,object_type,status from dba_objects where status='INVALID';
--Çóprocess/sessionµÄ״̬ select p.pid,p.spid,s.program,s.sid,s.serial# from v$process p,v$session s where s.paddr=p.addr;
--Çóµ±Ç°sessionµÄ״̬ select sn.name,ms.value from v$mystat ms,v$statname sn where ms.s