anchor.diff:                   {struct, [{title, <<"items not persisted">>},
                              {name, per_fts_stat(Id, <<"num_recs_to_persist">>)},
                              {desc, <<"Number items indexed but not yet persisted to disk">>}]},
  -                 {struct, [{title, <<"disk size">>},
  +                 {struct, [{isBytes, true},
  +                           {title, <<"disk size">>},
                              {name, per_fts_stat(Id, <<"num_bytes_used_disk">>)},
                              {desc, <<"Total disk file size used by the index">>}]},
                    {struct, [{title, <<"pindexes actual">>},
  
positive.code:                            {desc, <<"Number of PIndexes expected">>}]},
                   {struct, [{title, <<"compactions/sec">>},
                             {name, per_fts_stat(Id, <<"total_compactions">>)},
                             {desc, <<"Number of index compactions per second">>}]},
                   {struct, [{title, <<"queries/sec">>},
                             {name, per_fts_stat(Id, <<"total_queries">>)},
                             {desc, <<"Number of queries per second">>}]},
  
negative.code:                            {desc, <<"Number of queries that timeout per second">>}]},
                   {struct, [{title, <<"error queries/sec">>},
                             {name, per_fts_stat(Id, <<"total_queries_error">>)},
                             {desc, <<"Number of queries that resulted in errors per second. Includes timeouts.">>}]},
                   {struct, [{title, <<"bytes returned/sec">>},
                             {name, per_fts_stat(Id, <<"total_bytes_query_results">>)},
                             {desc, <<"Number of bytes returned in results per second">>}]},
                   {struct, [{title, <<"term searchers/sec">>},
                             {name, per_fts_stat(Id, <<"total_term_searchers">>)},
                             {desc, <<"Number of term searchers started per second">>}]}]}]}
       || Id <- AllIndexes].
  
  couchbase_query_stats_descriptions() ->
  