在linux或unix中，使用系统调用fork( )创建两个子进程，并观察子进程和父进程的运行情况。-In linux or unix, the use of system calls fork () to create two sub-processes, and to observe the sub-process and the operation of the parent process.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001273s ]
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:0.068711s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001047s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001124s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001116s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003251s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000841s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003789s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.024336s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001881s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 132692 [ RunTime:0.010658s ]
