为什么水烧开一次后再烧时比第一次开的快

页面:/news/view-1096527/ | 耗时:0.0415 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=1096527 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1096527 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1096527 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1042943,1094339,1109308,1067795,1063867,1126534,1129269,1122729,1107240,1128231,1072681,1125029,1067912,1060241,1111326,1105753,1084865,1096254,1131377,1306209,1124316,1070672,1084417,1120797,1042959,1096527,1078851,1072673,1050395,1093625) ORDER BY field (ArticleID,1042943,1094339,1109308,1067795,1063867,1126534,1129269,1122729,1107240,1128231,1072681,1125029,1067912,1060241,1111326,1105753,1084865,1096254,1131377,1306209,1124316,1070672,1084417,1120797,1042959,1096527,1078851,1072673,1050395,1093625)