ORACLE性能调整，内容包括：
跟踪与分析
索引、蔟与全表扫描
使用优化器调整性能
-Oracle Performance Tuning, including : tracking and analysis of the index, Cocooning table with the use of scanning devices adjusted performance optimization, etc.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001307s ]
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:0.256954s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.005025s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002053s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001529s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005542s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001367s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007521s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.024053s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001105s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 204689 [ RunTime:0.023951s ]
