select DISTINCT /+RULE/ ‘LOCK_WAIT_DETAIL#-#’ ||
t.owner || ‘.’ || t.object_name || ‘#-#’ ||
'sid: ’ || h.session_id || ', serial#: ’ || s.serial# || ‘#-#’ ||
s.program || ‘#-#’ ||
h.mode_held || ‘#-#’ ||
w.session_id || ‘#-#’ ||b.sql_text
from (select * from dba_locks) w, (select * from dba_locks ) h, v$session s, dba_objects t, v$locked_object l, (select sql_text from(select l.session_id sid,
s.serial#,
l.locked_mode,
l.oracle_username,
s.user#,
l.os_user_name,
s.machine,
s.terminal,
a.sql_text,
a.action
from v$sql a, v$session s, v$locked_object l
where l.session_id = s.sid
and s.prev_sql_addr = a.address
order by sid, s.serial#)) b
where h.blocking_others = ‘Blocking’
and h.mode_held != ‘None’
and h.mode_held != ‘Null’
and w.mode_requested != ‘None’
and w.lock_type = h.lock_type
and w.lock_id1 = h.lock_id1
and w.lock_id2 = h.lock_id2
and s.sid = h.session_id
and l.object_id = t.object_id
and l.session_id = h.session_id
AWR报告显示该SQL每天运行1000多次，每次消耗1秒。这个执行效率有点低。如何干预？