title: How to check if postgres is indexing concurrently?
body: <p>I have a written this migration to index concurrently:</p>
  
  <p><code>add_index :table_name, %i[field1 field2], algorithm: :concurrently</code></p>
  
  <p>How do I check if indexing is happening concurrently for new records insertion and update operation?</p>