docs: public Deferred<Object> execute(final TSDB tsdb, final Channel chan,
        final String[] cmd) {
      final boolean canonical = tsdb.getConfig().getBoolean("tsd.stats.canonical");
      final StringBuilder buf = new StringBuilder(1024);
      final ASCIICollector collector = new ASCIICollector("tsd", buf, null);
      doCollectStats(tsdb, collector, canonical);
      chan.write(buf.toString());
      return Deferred.fromResult(null);
    }