title: Why php-fpm warning respawning children?
body: <p>When my server receives many requests php-fpm records (php5-fpm.log) the following:</p>
  
  <pre><code>WARNING: [pool www] seems busy (you may need to increase pm.start_servers, or pm.min/max_spare_servers), spawning 8 children, there are 0 idle, and 6 total children
  </code></pre>
  
  <p>My php-fpm.conf is:</p>
  
  <pre><code>    ...
      pm = dynamic
      pm.max_children = 50
      pm.start_servers = 2
      pm.min_spare_servers = 1
      pm.max_spare_servers = 3
      pm.max_requests = 200
      ...
  </code></pre>