mysql 如何避免热点块？ 主键按sn自增列 Oracle 可以通过翻转索引 比如 插入101 102 103 104 变成101 201 301 401 分散数据 反转索引坏处,无法index range scan mysql> Create Index TEST_INDEX_R On machine_info(sn) Reverse; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Reverse' at line 1 mysql> Create Index TEST_INDEX_R On machine_info(info) Reverse; ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'Reverse' at line 1 mysql>