Only send the pid in the overview, it's not that interesting.

deps/rabbitmq_management/priv/www/js/tmpl/overview.ejs

@@ -12,7 +12,7 @@
 
 <table class="facts">
  <tr><th>node</th><td><%= node %></td></tr>
- <tr><th>pid</th><td><%= pid %></td></tr>
+ <tr><th>pid</th><td><%= os_pid %></td></tr>
  <tr><th>bound to</th><td><%= bound_to %></td></tr>
  <tr><th>file descriptors</th><td class="<%= fmt_color(fd_used / fd_total) %>"><%= fd_used %> / <%= fd_total %> <sub>(used/available)</span></td></tr>
  <tr><th>erlang processes</th><td class="<%= fmt_color(proc_used / proc_total) %>"><%= proc_used %> / <%= proc_total %> <sub>(used/available)</td></tr>

deps/rabbitmq_management/src/rabbit_management_format.erl

@@ -30,7 +30,6 @@
 encode(Facts) ->
     mochijson2:encode({struct,
                        [{node, node()},
-                        {pid, list_to_binary(os:getpid())},
                         {datetime, list_to_binary(
                                      rabbit_management_util:http_date())}
                        ] ++ Facts}).

deps/rabbitmq_management/src/rabbit_management_overview.erl

@@ -38,7 +38,8 @@ to_json(ReqData, Context) ->
     Overview = rabbit_management_stats:get_overview(),
     {rabbit_management_format:encode(
        OSStats ++ Overview ++
-           [{mem_ets, erlang:memory(ets)},
+           [{os_pid, list_to_binary(os:getpid())},
+            {mem_ets, erlang:memory(ets)},
             {mem_binary, erlang:memory(binary)}]),
        ReqData, Context}.