show status like '%handler_read_key%';

#走索引的命令的数量.

#查看存储引擎

mysql> show variables like '%engine%';
+----------------------------+--------+
| Variable_name              | Value  |
+----------------------------+--------+
| default_storage_engine     | InnoDB |
| default_tmp_storage_engine | InnoDB |
| storage_engine             | InnoDB |
+----------------------------+--------+