27 lines
779 B
MySQL
27 lines
779 B
MySQL
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-- -----------------------------------------------------------------------------------
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-- File Name : https://oracle-base.com/dba/monitoring/latch_hit_ratios.sql
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-- Author : Tim Hall
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-- Description : Displays current latch hit ratios.
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-- Requirements : Access to the V$ views.
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-- Call Syntax : @latch_hit_ratios
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-- Last Modified: 15-JUL-2000
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-- -----------------------------------------------------------------------------------
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SET LINESIZE 200
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COLUMN latch_hit_ratio FORMAT 990.00
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SELECT l.name,
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l.gets,
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l.misses,
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((1 - (l.misses / l.gets)) * 100) AS latch_hit_ratio
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FROM v$latch l
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WHERE l.gets != 0
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UNION
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SELECT l.name,
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l.gets,
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l.misses,
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100 AS latch_hit_ratio
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FROM v$latch l
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WHERE l.gets = 0
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ORDER BY 4 DESC;
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