了解服务器的内部结构，对LOCK有一个 更高层次的认识。 建议有3年C++编程的朋友参考。-understanding of the internal structure of the server, right LOCK have a higher level of awareness. Proposal 3 years C programming reference to a friend.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.000980s ]
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:0.074122s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001013s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001121s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.000950s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003072s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000892s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003637s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.022487s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001031s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 64262 [ RunTime:0.020168s ]
