Running MySQLTuner 2.6.2: The only issue that shows: InnoDB Read buffer efficiency: 100.00% (7556313946 hits / 7556546693 total) InnoDB Write Log efficiency: **3130.77%** (2685605 hits / 85781 total) InnoDB log waits: 0.00% (0 waits / 2771386 writes) The following suggestion is given: innodb_log_buffer_size (> 16M) Have tried to increase it up to 512MB but the warning keeps showing. How can the InnoDB Write Log efficiency be over 100%?