这是一个操作系统课程设计的算法 编程计算磁头移动的总柱面数和总寻道时间（fcfs）-courses on operating system design algorithm programmed to calculate the total mobile head cylinder and total seek time (fcfs)
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001381s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.088921s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001192s ]
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SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001201s ]
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SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001024s ]
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SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014433s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001240s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 300163 [ RunTime:0.001408s ]
