title: Postgres uses High CPU - unable to find
body: <p>I'm having Postgres 9.6.4 in Ubuntu 17.  After every few hours (say 6 hours or so), the OS CPU utilization becomes very high (upto 98% or more).
  I did the following:</p>
  
  <pre><code># ps aux | grep postgres
  </code></pre>
  
  <p>Whenever the process/CPU is high, the above command shows postgres processes like this:</p>
  
  <pre><code>31928     1 ./x3665600000                0.2 99.8
  </code></pre>
  
  <p>The process name with x3665600000 always consumes near to 100% CPU.</p>
  
  <p>When I checked the pg_stat_activity table, it shows SQL query like this: </p>
  
  <pre><code>select Fun310280 ('./x3665600000 &amp;')
  select Fun310280 ('./ps3657178651 &amp;')
  </code></pre>
  
  <p>What is this function causing Postgres to use very high CPU?</p>