查看oracle当前连接的情况

SELECT /* use_hash(sess,proc,undo,tmp) use_nl(s)*/ distinct        sess.inst_id,        sess.sid,        sess.serial#,        sess.username,        substr(osuser,1,10) osuser,        status,        sess.process,        proc.spid,        sess.machine,        sess.program,        regexp_substr(NUMTODSINTERVAL(nvl((SYSDATE-SQL_EXEC_START)*24*60*60,last_call_et), 'SECOND'),'+\d{2} \d{2}:\d{2}:\d{2}') running_sec,        TEMP_MB, UNDO_MB,        s.sql_id ,        TSPS.NAME TSPS,        decode(sess.action,null,'',sess.action||', ')||replace(s.sql_text,chr(13),' ') sqlFROM        gv$session sess,        gv$process proc,        gv$sql s,        (select ses_addr as saddr,sum(used_ublk/128) UNDO_MB from v$transaction group by ses_addr) undo,        (select session_addr as saddr, SESSION_NUM serial#, sum((blocks/128)) TEMP_MB from gv$sort_usage group by  session_addr, SESSION_NUM) tmp,        (select inst_id,sid,serial#,event,t.name from gv$session ls, sys.file$ f, sys.ts$ t where status='ACTIVE' and ls.p1text in ('file number','file#') and ls.p1=f.file#  and f.ts#=t.ts#) tspsWHERE sess.inst_id=proc.inst_id (+)  and   sess.saddr=tmp.saddr (+) and sess.serial#=tmp.serial# (+)AND   sess.status='ACTIVE' and sess.username is not nulland   sess.sid=tsps.sid (+) and sess.inst_id=tsps.inst_id(+) and sess.serial#=tsps.serial#(+)AND   sess.paddr=proc.addr (+)and   sess.sql_id = s.sql_id (+)and   sess.saddr=undo.saddr (+)ORDER BY running_sec desc,4,1,2,3;