解决问题：单表数据量过大
ALTER TABLE boc_url_log PARTITION BY RANGE (ulid) ( PARTITION log_1 VALUES LESS THAN (1000000) ENGINE = MyISAM, PARTITION log_2 VALUES LESS THAN (2000000) ENGINE = MyISAM, PARTITION log_3 VALUES LESS THAN (3000000) ENGINE = MyISAM, PARTITION log_4 VALUES LESS THAN MAXVALUE ENGINE = MyISAM );
原文：https://www.cnblogs.com/xiaobiaomei/p/9542843.html