oracle管理员日常工作中必备的sql列表.docVIP

数据库管理员日常工作中必备的sql列表 　　--监控索引是否使用 　　alter index index_name monitoring usage;　　alter index index_name nomonitoring usage;　　select * from v$object_usage where index_name = index_name; 　　--求数据文件的I/O分布 　　select df.name,phyrds,phywrts,phyblkrd,phyblkwrt,singleblkrds,readtim,writetim　　from v$filestat fs,v$dbfile df　　where fs.file#=df.file# order by df.name; 　　--求某个隐藏参数的值 　　col ksppinm format a54　　col ksppstvl format a54　　select ksppinm, ksppstvl　　from x$ksppi pi, x$ksppcv cv　　where cv.indx=pi.indx and pi.ksppinm like \_% escape \ and pi.ksppinm like %meer%; 　　--求系统中较大的latch 　　select name,sum(gets),sum(misses),sum(sleeps),sum(wait_time)　　from v$latch_children　　group by name having sum(gets) 50 order by 2; 　　--求归档日志的切换频率(生产系统可能时间会很长) 　　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 　　--求回滚段正在处理的事务 　　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$transaction e　　where a.usn=b.usn and b.usn=e.xidusn and c.taddr=e.addr　　and c.sql_address=d.address and c.sql_hash_value=d.hash_value order by a.name,c.sid,d.piece; 　　--求出无效的对象 　　select alter procedure ||object_name|| compile;　　from dba_objects　　where status=INVALID and wner= and object_type in (PACKAGE,PACKAGE BODY);　　/　　select owner,object_name,object_type,status from dba_objects where status=INVALID; 　　--求process/session的状态 　　select p.pid,p.spid,s.program,s.sid,s.serial#　　from v$process p,v$session s where s.paddr=p.addr; 　　--求当前session的状态 　　select sn.name,ms.value　　from v$mystat ms,v$statname sn　　where ms.statistic#=sn.statistic# and ms.value 0; 　　--