Show the InnoDB buffer pool hit rate

SELECT ROUND(100 * (1 - (
         SELECT VARIABLE_VALUE FROM information_schema.GLOBAL_STATUS
          WHERE VARIABLE_NAME = 'INNODB_BUFFER_POOL_READS'
       ) / (
         SELECT VARIABLE_VALUE FROM information_schema.GLOBAL_STATUS
          WHERE VARIABLE_NAME = 'INNODB_BUFFER_POOL_READ_REQUESTS'
       )), 2) AS hit_rate_pct;