Database Tuning
We have designed a set of case studies to illustrate the impact of various database tuning principles on the performance of actual systems in a sanitized application context.
Get started with the ReserveWithUs case study.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001357s ]
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:0.092160s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001322s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001921s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001226s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003615s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001075s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003179s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014842s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001452s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 271276 [ RunTime:0.001229s ]
