随着 Linux 操作系统的发展，特别是 Linux 2.6 内核的迅速发展，嵌入式 Linux 在嵌入式
领域的应用越来越广泛。Linux 具备源码开放、内核稳定高效、软件丰富等优势，而且还具
备支持广泛的处理器结构和硬件平台、可定制性好、可靠性高等特点。据 IDC 的报告显示，
嵌入式 Linux 在未来两年将占嵌入式操作系统市场份额的 50%，约 3.5 亿美元，由此产生的
应用市场前景更是不可估量。
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001021s ]
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:0.075446s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001382s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002051s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001445s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005839s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001119s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007315s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.041960s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001811s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 433343 [ RunTime:0.022798s ]
