title: unable to extend segment by 8 in undo tablespace 'UND_TBS'
body: <p>I'm trying to insert data from <code>table1</code> to an existing table say <code>table2</code>.
  table1 has 30 million records. Used the below command to insert the data. Got the given error after some time.</p>
  
  <pre><code>insert into TABLE2 (select * from TABLE1)
  Error at Command Line:31 Column:0
  Error report:
  SQL Error: ORA-30036: unable to extend segment by 8 in undo tablespace 'UND_TBS'
  30036. 00000 -  "unable to extend segment by %s in undo tablespace '%s'"
  </code></pre>
  
  <p>It shown that, <code>the specified undo tablespace has no more space available.</code></p>
  
  <p>Before retrying the operation, what can I do. Is there any other workarounds available to insert the data successfully?</p>