title: WP database tables rapidly changing
body: <p>I have a Wordpress site (currently running 3.9.1) that has a few tables in which the number of containing rows changes rapidly and seemingly dramatically.  The total number of rows in my <em>_commentmeta</em> and <em>_postmeta</em> tables will increase/decrease in the tens of thousands in a couple of seconds.  My <em>_comments</em> table also changes, but its activity is less dramatic than the other two previously mentioned.</p>
  
  <p>This is not a high traffic web site.  I took at a look at the real-time analytics and when there are zero current visitors it will still do this.</p>
  
  <p>I have a test site in which I duplicated the fileset and database for this site and it's behaving the same way.  I have deactivated plugins and that didn't stop it.  I then removed the fileset from the server entirely and it was still doing it.  I checked the server to see if there were any cron jobs I didn't know about automatically doing things relating to the database and nothing.</p>
  
  <p>Any ideas as to what might be causing this continual rapid change in the size of these tables?</p>
  
  <p><strong><em>UPDATE:</em></strong> these database tables are still changing even after removing the web site files from the server.  I looked into if there was an <a href="http://dev.mysql.com/doc/refman/5.5/en/events.html" rel="nofollow">event scheduler</a> active (using "SELECT @@event_scheduler" query) but it was off.</p>