操作系统 内存管理的模拟，很好的理解内存管理的基本原则和方法-The operating system memory management simulation, a good understanding of the basic principles of memory management and methods of
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001336s ]
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:0.099984s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001486s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003274s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001446s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005971s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001010s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003476s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014362s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001194s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 239431 [ RunTime:0.001480s ]
