title: ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS3'
body: <p>Oracle is throwing this error when dropping and creating a table I regularly do without problem.</p>
  <pre><code>ORA-12801: error signaled in parallel query server P000, instance MyURL:bwup (3)
  ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS3'
  </code></pre>
  <p>I would like to understand conceptually what is happening here and how could I fix this without autoextending the tablespace. I've purged the DB in order to cleanse the space occupied by those recoverable tables recently dropped and stopped throwing the error, but I don't understand why. Is that tablespace that Oracle is talking about common for different processes?</p>