超详细的PID参数调整讲解，整理了多个版本，方便比较加深理解-Ultra-detailed adjust PID parameters on, organize a number of versions of a deeper understanding to facilitate comparison
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001094s ]
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:0.103147s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001054s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002223s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001119s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004609s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001309s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003994s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014801s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001371s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 130022 [ RunTime:0.001482s ]
