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stuartmg/cache_hit_ratio.sql

Created April 9, 2013 17:43
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Find out cache hit ratio in PostgreSQL. This should ideally be 99% or higher.
Raw
cache_hit_ratio.sql
SELECT
sum(heap_blks_hit) / (sum(heap_blks_hit) + sum(heap_blks_read)) cache_hit_ratio
FROM
pg_statio_user_tables;
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