title: What it means by "MEMORY_TARGET" in this Oracle database error?
body: <p>I'm trying to run an Oracle database memory-management exercise on the VirtualBox Oracle Developer-Days VM.  I want to make scenario where I change the memory based on the archive-log (to get a pseudo intelligent system )</p>
  <pre><code>STARTUP MOUNT;
  ORACLE instance shut down.
  SQL&gt; ORA-00845: MEMORY_TARGET not supported on this system
  </code></pre>
  <p>I'm not sure if this info helps , but here's my <code>/dev/shm</code> memory :</p>
  <p><a href="https://i.stack.imgur.com/Pqtkb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Pqtkb.png" alt="" /></a></p>
  <p>Any tips appreciated, thanks</p>