硬盘缓存是越大越好吗

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select * from tbl_Articles WHERE ArticleID=2892913 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=2892913 LIMIT 0,1
select * from tbl_Articles_sphinx where id=2892913 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1064447,1045127,1054392,1065259,1072865,1069221,1073588,1074312,1073385,2861992,1065945,1071131,1073698,1065573,1065377,1127173,1072403,1067015,1076105,1051283,1095568,1064085,1054612,1064051,1066296,1067397,1071994,1047141,1068358,1062350) ORDER BY field (ArticleID,1064447,1045127,1054392,1065259,1072865,1069221,1073588,1074312,1073385,2861992,1065945,1071131,1073698,1065573,1065377,1127173,1072403,1067015,1076105,1051283,1095568,1064085,1054612,1064051,1066296,1067397,1071994,1047141,1068358,1062350)