一、Mysql 5.7高度计算

1. 从视图查询计算索引树高度表的索引存储信息

mysql> SELECT b.name, a.name, index_id, a.PAGE_NO   FROM  information_schema.INNODB_SYS_INDEXES a join  informattion_schema.INNODB_SYS_TABLES b       
on  a.table_id = b.table_id where b.name='mirror/FLEX_RF_RESULT_2022_05_022';
+----------------------------------+-----------------------+----------+---------+
| name                             | name                  | index_id | PAGE_NO |
+----------------------------------+-----------------------+----------+---------+
| mirror/FLEX_RF_RESULT_2022_05_02 | GEN_CLUST_INDEX       |      110 |       3 |
| mirror/FLEX_RF_RESULT_2022_05_02 | FLEX_RF_RESULT_PIDX01 |      111 |       4 |
| mirror/FLEX_RF_RESULT_2022_05_02 | FLEX_RF_RESULT_PIDX02 |      112 |       5 |
+----------------------------------+-----------------------+----------+---------+