本程序通过最久未使用替换算法进行替换，在块表里设置一个标志位，标志使用的次数。选择次数最少的一个进行替换。-the procedures used by the most time on the replacement algorithm replacement, set up in a block exterior signs spaces, the number of signs. The least number of options for a replacement.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001998s ]
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:0.116421s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002507s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001935s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002244s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003695s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.002137s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003516s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014649s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002415s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 110755 [ RunTime:0.001346s ]
