title: Creating mysql index failed on amazon RDS mysql table
body: <p>I was trying to create index for a 100million rows table on a datatime type field called updated_date. My clause is: create index ops_index_updated on ops_data(updated_date);
  But I met the following problem: 
  lERROR 1034 (HY000): Incorrect key file for table 'ops_data'; try to repair it.</p>
  
  <p>I searched on google, it says the reason is the folder /tmp is full, I need to delete this folder. But I'm using amazon RDS mysql, how can I logon the server to delete the folder?</p>