title: kthreaddk in postgres uses high cpu
body: <p>I used Postgres in node.js project but my cpu is 100% in ubuntu server</p>
  <p>I used this command</p>
  <pre><code>killall -9 kthreaddk
  </code></pre>
  <p>I stopped my project and stop <code>postgresql service</code>, after killing <code>kthreaddk</code> cpu is 0% but after 30 second <code>kthreaddk</code> run again and cpu will be 100% agian</p>
  <p>what is <code>khtreaddk</code> and how to stopped it forever?</p>
  <p>I try many ways that here is in stackoverflow but I can't solve it</p>
  <p><a href="https://i.stack.imgur.com/A7lRM.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/A7lRM.jpg" alt="enter image description here" /></a></p>