如题，计数型信号量用于任务间同步，二进制信号量适用于任务间同步，但是如果事件发生过快，可能导致数据丢失。但是使用计数型信号量就可以就决这个问题-Such as title, Counting Semaphore for inter-task synchronization, a binary semaphore for inter-task synchronization, but if the incident took place too quickly, may lead to data loss. However, the use of Counting semaphores can on this issue summary
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001309s ]
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:0.086520s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001362s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001335s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001049s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003646s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001196s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.007594s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.014791s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001565s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 185790 [ RunTime:0.014730s ]
