请解释蛛网理论蛛网模型的含义

页面:/news/view-333641/ | 耗时:0.8599 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=333641 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=333641 LIMIT 0,1
select * from tbl_Articles_sphinx where id=333641 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1108562,1102250,1065525,1074923,1110113,1092113,1117968,1070498,1069335,1110674,1051075,1116743,1082936,1067265,1071243,1122946,1117003,1085576,1113832,1114957,1108640,1115699,1098207,1095716,1121528,1062930,1080098,1099553,1091362,1091197) ORDER BY field (ArticleID,1108562,1102250,1065525,1074923,1110113,1092113,1117968,1070498,1069335,1110674,1051075,1116743,1082936,1067265,1071243,1122946,1117003,1085576,1113832,1114957,1108640,1115699,1098207,1095716,1121528,1062930,1080098,1099553,1091362,1091197)