title: Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 65488 bytes) In Magento 1.9.1
body: <p>I have change my unsecure base url from <code>{{base_url}}</code> to <code>{{unsecure_base_url}}</code>.
  After this I am getting this error
   <code>"Fatal error:Allowed memory size of 268435456 bytes exhausted (tried to allocate 65488 bytes)"</code>.</p>
  
  <p>I have tried <code>ti change set ini_set('memory_limit', '512M')</code>. </p>
  
  <p>Now it show the error <code>"Fatal error:Allowed memory size of 536870912 bytes exhausted (tried to allocate 65488 bytes)"</code>.
  I also changed the values in databse  <code>core_config_data &gt; unsecure/base_url” andchange</code> the value to <code>“{{base_url}}”</code>;but still have the same error. Can anyone help me?. 
  Thanks in advance.</p>