为什么会有蟑螂出现

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select * from tbl_Articles WHERE ArticleID=92272 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=92272 LIMIT 0,1
select * from tbl_Articles_sphinx where id=92272 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1130142,1132603,1106956,1131437,1011371,990700,1113604,1104101,1061756,1125182,1123440,1132761,982711,1113754,1069960,1123424,1115083,1118008,1131153,1129991,1125466,1132703,999520,1095810,138134,1108710,1108025,1105133,1103784,1129625) ORDER BY field (ArticleID,1130142,1132603,1106956,1131437,1011371,990700,1113604,1104101,1061756,1125182,1123440,1132761,982711,1113754,1069960,1123424,1115083,1118008,1131153,1129991,1125466,1132703,999520,1095810,138134,1108710,1108025,1105133,1103784,1129625)