title: Elasticsearch jdbc river import slow
body: <p>I'm trying to import a sqlserver database to ES with jdbc river but the import process is very slow. In the logs I see that the process is doing the import 1 by 1:</p>
  
  <pre><code>new bulk [58] of [1 items], 1 outstanding bulk requests
  bulk [58] success [1 items] [116ms]
  new bulk [59] of [1 items], 1 outstanding bulk requests
  bulk [59] success [1 items]
  </code></pre>
  
  <p>How can I speed up the process?</p>