4 years ago · 2940b64b61
parent 62eb2e5a5a
commit 2940b64b61
1 changed files with 2 additions and 2 deletions
--- a/sql/postgres_indexes_caches_hit_ratio.sql
+++ b/sql/postgres_indexes_caches_hit_ratio.sql
@ -20,8 +20,8 @@
 SELECT
  SUM(idx_blks_read) AS idx_read,
  SUM(idx_blks_hit)  AS idx_hit,
-  (SUM(idx_blks_hit) - SUM(idx_blks_read)) /
-					SUM(idx_blks_hit)
+					SUM(idx_blks_hit) /
+  (SUM(idx_blks_hit) + SUM(idx_blks_read))::float
 							AS ratio
 FROM
  pg_statio_user_indexes;