title: What is a limit to the size of a single document CouchDb
body: <p>I have a problem with document storage complex data structure, which may vary. Document need to store and retrieve whole. Need to provide a document search fields. 
  I began to store documents in MongoBb, but the size of the document there is limited to 16 MB, which is not enough for me. 
  What is the maximum size of a single document allows CouchDb?</p>