title: nginx connection limit
body: <p>We had 2 nginx servers running perfectly at 1000reqs/second total in front of 3 php5-fpm servers with TCP connections. We thought that one nginx server would be sufficient and redirected all of our traffic to it. But, the server could not serve more than 750reqs/sec. It has gigabit ethernet and total traffic on it doesnot exceed 100mbits (Debian 6.0)</p>
  
  <p>We could not find any reason and after googling found out that it might be related with TCP issues. But it did not seem very likely that we should do any change with this number of connections and bandwidth (around 70mbits/sec) Later we redirected half of our traffic back to another nginx and again reached 1000reqs/second.</p>
  
  <p>We have been looking at nginx error and access logs. Is there any tool or file that could help us find the solution for the problem?</p>