为什么有时候会卡粉

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select * from tbl_Articles_data WHERE ArticleID=352960 LIMIT 0,1
select * from tbl_Articles_sphinx where id=352960 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(175333,838624,1121766,3385008,177976,1116779,1352584,1807456,2449196,922305,3357952,1100985,1538931,1115400,1090048,1069395,1124063,1883964,1048564,1893168,271167,1103941,2056455,349310,265932,1090338,1291527,1809032,241882,827376) ORDER BY field (ArticleID,175333,838624,1121766,3385008,177976,1116779,1352584,1807456,2449196,922305,3357952,1100985,1538931,1115400,1090048,1069395,1124063,1883964,1048564,1893168,271167,1103941,2056455,349310,265932,1090338,1291527,1809032,241882,827376)