text: /* Index hit rate (effective databases are at 99% and up) */
  
  SELECT
    relname,
    CASE idx_scan
      WHEN 0 THEN 'Insufficient data'
      ELSE (100 * idx_scan / (seq_scan + idx_scan))::text
    END percent_of_times_index_used,
    n_live_tup rows_in_table
   FROM
     pg_stat_user_tables
   ORDER BY
     n_live_tup DESC;
  