TOP LATCH情况

-- Description  : Displays information about the top latches.
-- Requirements : Access to the V$ views.
-- Call Syntax  : @top_latches

SET LINESIZE 200
SELECT l.latch#,
       l.name,
       l.gets,
       l.misses,
       l.sleeps,
       l.immediate_gets,
       l.immediate_misses,
       l.spin_gets
  FROM v$latch l
 WHERE l.misses > 0
 ORDER BY l.misses DESC;