页面置换算法演示，程序中含有一些对控制台输出和事件进行控制的API函数.
-Demo page replacement algorithm, the program contains some of the console output and the control of the incident API function.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.002689s ]
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:0.094725s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002427s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001918s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002163s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003567s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001953s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003195s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016201s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.002520s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 177315 [ RunTime:0.001149s ]
