2026-03-12 20:23:15

timhall/monitoring/lru_latch_ratio.sql

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+-- -----------------------------------------------------------------------------------
+-- File Name    : https://oracle-base.com/dba/monitoring/lru_latch_ratio.sql
+-- Author       : Tim 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