操作系统动态分区分配，操作系统中利用最佳适应算法 最坏适应算法 循环首次适应算法 首次适应算法实现动态内存的分配和回收内存-The operating system using the best-fit algorithm worst-fit algorithm loop first-fit algorithm first-fit algorithm to achieve dynamic memory allocation and recovery of memory。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001016s ]
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:0.084350s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.006162s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001241s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001019s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003256s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000842s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003941s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015552s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001258s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 54900 [ RunTime:0.022740s ]
