额定容量是什么意思

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select * from tbl_Articles WHERE ArticleID=489817 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=489817 LIMIT 0,1
select * from tbl_Articles_sphinx where id=489817 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(380507,454550,408066,439322,470831,397225,392529,481766,1102252,1108908,1119694,481684,1114296,466637,375276,1089199,1090599,371939,100787,455627,3060426,1120348,406695,1103491,1110291,387812,498678,446156,453015,490915) ORDER BY field (ArticleID,380507,454550,408066,439322,470831,397225,392529,481766,1102252,1108908,1119694,481684,1114296,466637,375276,1089199,1090599,371939,100787,455627,3060426,1120348,406695,1103491,1110291,387812,498678,446156,453015,490915)