-- Description : Displays current LRU latch ratios.
-- Requirements : Access to the V$ views.
-- Call Syntax : @lru_latch_hit_ratio
SET LINESIZE 500
SET PAGESIZE 1000
COLUMN "Ratio %" FORMAT 990.00
PROMPT
PROMPT Values greater than 3% indicate contention.
SELECT a.child#,
(a.SLEEPS / a.GETS) * 100 "Ratio %"
FROM v$latch_children a
WHERE a.name = 'cache buffers lru chain'
ORDER BY 1;
SET PAGESIZE 14
阅读(994) | 评论(0) | 转发(0) |
