lru_latch_ratio.sql

oracle dba 常用的管理脚本, 覆盖日常的系统管理.

--* File Name    : LRU_Latch_Ratio.sql
--* Author       : DR Timothy S Hall
--* Description  : Displays current LRU latch ratios.
--* Requirements : Access to the V$ views.
--* Call Syntax  : @LRU_Latch_Hit_Ratio
--* Last Modified: 15/07/2000
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