Add new counter to track the number of docs being processed using

bulk_docs request.

Author: brkolla

src/chttpd_db.erl

@@ -375,6 +375,7 @@ db_req(#httpd{method='POST',path_parts=[_,<<"_bulk_docs">>], user_ctx=Ctx}=Req,
         DocsArray0
     end,
     couch_stats:update_histogram([couchdb, httpd, bulk_docs], length(DocsArray)),
+    couch_stats:increment_counter([couchdb, bulk_request_docs], length(DocsArray)),
     W = case couch_util:get_value(<<"w">>, JsonProps) of
     Value when is_integer(Value) ->
         integer_to_list(Value);
@@ -448,6 +449,7 @@ db_req(#httpd{method='POST', path_parts=[_, <<"_bulk_get">>]}=Req, Db) ->
         undefined ->
             throw({bad_request, <<"Missing JSON list of 'docs'.">>});
         Docs ->
+            couch_stats:increment_counter([couchdb, bulk_request_docs], length(Docs)),
             #doc_query_args{
                 options = Options
             } = bulk_get_parse_doc_query(Req),