为什么会出现泾渭分明的自然现象

页面:/news/view-2703865/ | 耗时:0.3054 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=2703865 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2703865 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2703865 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1086116,1065469,1078811,1067795,1105345,1088774,1077074,986336,1093799,1108522,1089832,1091950,1110850,1098207,1096737,1054676,1108640,1304459,1110255,1041729,1067895,1102328,1067207,1084081,1110157,1065495,1043987,1074334,1105657,1090909) ORDER BY field (ArticleID,1086116,1065469,1078811,1067795,1105345,1088774,1077074,986336,1093799,1108522,1089832,1091950,1110850,1098207,1096737,1054676,1108640,1304459,1110255,1041729,1067895,1102328,1067207,1084081,1110157,1065495,1043987,1074334,1105657,1090909)