我想知道缓存器是什么

页面:/news/view-3133188/ | 耗时:0.8354 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=3133188 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3133188 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3133188 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1078076,1094875,1075859,1082333,1068532,1124324,1102814,1099203,1090699,1094177,1086063,1092976,1062392,1125951,1098219,1108377,1045314,1052887,1103851,1078182,1054942,1068734,1076786,1066852,1071041,1083170,1097047,1047321,1114784,1062000) ORDER BY field (ArticleID,1078076,1094875,1075859,1082333,1068532,1124324,1102814,1099203,1090699,1094177,1086063,1092976,1062392,1125951,1098219,1108377,1045314,1052887,1103851,1078182,1054942,1068734,1076786,1066852,1071041,1083170,1097047,1047321,1114784,1062000)