硬盘缓存是越大越好吗

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select * from tbl_Articles WHERE ArticleID=3441325 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=3441325 LIMIT 0,1
select * from tbl_Articles_sphinx where id=3441325 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1058839,1009092,1107909,1119065,1109603,1119141,1106861,1108189,1117840,1105812,1115115,1068274,1043181,1115365,1112969,1120055,1114758,1118076,1109803,1108353,1103977,1108872,1111936,1098709,1107723,1103101,1097243,1106384,1106132,1103190) ORDER BY field (ArticleID,1058839,1009092,1107909,1119065,1109603,1119141,1106861,1108189,1117840,1105812,1115115,1068274,1043181,1115365,1112969,1120055,1114758,1118076,1109803,1108353,1103977,1108872,1111936,1098709,1107723,1103101,1097243,1106384,1106132,1103190)