From: jiangwen jiang Date: September 14 2011 9:20am Subject: [question]master-slave sync delay List-Archive: http://lists.mysql.com/mysql/225730 Message-Id: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=0015174c1c1e1ddb7e04ace346a7 --0015174c1c1e1ddb7e04ace346a7 Content-Type: text/plain; charset=ISO-8859-1 Hi, all: There is a problem about master-slave sync delay, I find some infomations from 'show processlist', some like that: 1051 system user ns Connect 10 update xxx what does Connect mean, mysql manual explained: Connect A replication slave is connected to its master. Then, There is 10s delay from master to slave. I want to know why does this happend, slow network I/O? or something wrong with this update SQL? Thanks Regards W.J --0015174c1c1e1ddb7e04ace346a7--