/** Build the stats from information about each node. */
    private OsStats(List<NodeInfo> nodeInfos, List<NodeStats> nodeStatsList) {
      this.names = new ObjectIntHashMap<>();
      int availableProcessors = 0;
      int allocatedProcessors = 0;
      for (NodeInfo nodeInfo : nodeInfos) {
        availableProcessors += nodeInfo.getOs().getAvailableProcessors();
        allocatedProcessors += nodeInfo.getOs().getAllocatedProcessors();

        if (nodeInfo.getOs().getName() != null) {
          names.addTo(nodeInfo.getOs().getName(), 1);
        }
      }
      this.availableProcessors = availableProcessors;
      this.allocatedProcessors = allocatedProcessors;

      long totalMemory = 0;
      long freeMemory = 0;
      for (NodeStats nodeStats : nodeStatsList) {
        if (nodeStats.getOs() != null) {
          long total = nodeStats.getOs().getMem().getTotal().getBytes();
          if (total > 0) {
            totalMemory += total;
          }
          long free = nodeStats.getOs().getMem().getFree().getBytes();
          if (free > 0) {
            freeMemory += free;
          }
        }
      }
      this.mem = new org.elasticsearch.monitor.os.OsStats.Mem(totalMemory, freeMemory);
    }
  private Table buildTable(
      RestRequest req,
      ClusterStateResponse state,
      NodesInfoResponse nodesInfo,
      NodesStatsResponse nodesStats) {
    boolean fullId = req.paramAsBoolean("full_id", false);

    DiscoveryNodes nodes = state.getState().nodes();
    String masterId = nodes.masterNodeId();
    Table table = getTableWithHeader(req);

    for (DiscoveryNode node : nodes) {
      NodeInfo info = nodesInfo.getNodesMap().get(node.id());
      NodeStats stats = nodesStats.getNodesMap().get(node.id());

      JvmInfo jvmInfo = info == null ? null : info.getJvm();
      JvmStats jvmStats = stats == null ? null : stats.getJvm();
      FsInfo fsInfo = stats == null ? null : stats.getFs();
      OsStats osStats = stats == null ? null : stats.getOs();
      ProcessStats processStats = stats == null ? null : stats.getProcess();
      NodeIndicesStats indicesStats = stats == null ? null : stats.getIndices();

      table.startRow();

      table.addCell(fullId ? node.id() : Strings.substring(node.getId(), 0, 4));
      table.addCell(info == null ? null : info.getProcess().getId());
      table.addCell(node.getHostName());
      table.addCell(node.getHostAddress());
      if (node.address() instanceof InetSocketTransportAddress) {
        table.addCell(((InetSocketTransportAddress) node.address()).address().getPort());
      } else {
        table.addCell("-");
      }

      table.addCell(node.getVersion().number());
      table.addCell(info == null ? null : info.getBuild().shortHash());
      table.addCell(jvmInfo == null ? null : jvmInfo.version());
      table.addCell(fsInfo == null ? null : fsInfo.getTotal().getAvailable());
      table.addCell(jvmStats == null ? null : jvmStats.getMem().getHeapUsed());
      table.addCell(jvmStats == null ? null : jvmStats.getMem().getHeapUsedPercent());
      table.addCell(jvmInfo == null ? null : jvmInfo.getMem().getHeapMax());
      table.addCell(
          osStats == null ? null : osStats.getMem() == null ? null : osStats.getMem().getUsed());
      table.addCell(
          osStats == null
              ? null
              : osStats.getMem() == null ? null : osStats.getMem().getUsedPercent());
      table.addCell(
          osStats == null ? null : osStats.getMem() == null ? null : osStats.getMem().getTotal());
      table.addCell(processStats == null ? null : processStats.getOpenFileDescriptors());
      table.addCell(
          processStats == null
              ? null
              : calculatePercentage(
                  processStats.getOpenFileDescriptors(), processStats.getMaxFileDescriptors()));
      table.addCell(processStats == null ? null : processStats.getMaxFileDescriptors());

      table.addCell(
          osStats == null ? null : String.format(Locale.ROOT, "%.2f", osStats.getLoadAverage()));
      table.addCell(jvmStats == null ? null : jvmStats.getUptime());
      table.addCell(node.clientNode() ? "c" : node.dataNode() ? "d" : "-");
      table.addCell(
          masterId == null
              ? "x"
              : masterId.equals(node.id()) ? "*" : node.masterNode() ? "m" : "-");
      table.addCell(node.name());

      CompletionStats completionStats =
          indicesStats == null ? null : stats.getIndices().getCompletion();
      table.addCell(completionStats == null ? null : completionStats.getSize());

      FieldDataStats fdStats = indicesStats == null ? null : stats.getIndices().getFieldData();
      table.addCell(fdStats == null ? null : fdStats.getMemorySize());
      table.addCell(fdStats == null ? null : fdStats.getEvictions());

      QueryCacheStats fcStats = indicesStats == null ? null : indicesStats.getQueryCache();
      table.addCell(fcStats == null ? null : fcStats.getMemorySize());
      table.addCell(fcStats == null ? null : fcStats.getEvictions());

      RequestCacheStats qcStats = indicesStats == null ? null : indicesStats.getRequestCache();
      table.addCell(qcStats == null ? null : qcStats.getMemorySize());
      table.addCell(qcStats == null ? null : qcStats.getEvictions());
      table.addCell(qcStats == null ? null : qcStats.getHitCount());
      table.addCell(qcStats == null ? null : qcStats.getMissCount());

      FlushStats flushStats = indicesStats == null ? null : indicesStats.getFlush();
      table.addCell(flushStats == null ? null : flushStats.getTotal());
      table.addCell(flushStats == null ? null : flushStats.getTotalTime());

      GetStats getStats = indicesStats == null ? null : indicesStats.getGet();
      table.addCell(getStats == null ? null : getStats.current());
      table.addCell(getStats == null ? null : getStats.getTime());
      table.addCell(getStats == null ? null : getStats.getCount());
      table.addCell(getStats == null ? null : getStats.getExistsTime());
      table.addCell(getStats == null ? null : getStats.getExistsCount());
      table.addCell(getStats == null ? null : getStats.getMissingTime());
      table.addCell(getStats == null ? null : getStats.getMissingCount());

      IndexingStats indexingStats = indicesStats == null ? null : indicesStats.getIndexing();
      table.addCell(indexingStats == null ? null : indexingStats.getTotal().getDeleteCurrent());
      table.addCell(indexingStats == null ? null : indexingStats.getTotal().getDeleteTime());
      table.addCell(indexingStats == null ? null : indexingStats.getTotal().getDeleteCount());
      table.addCell(indexingStats == null ? null : indexingStats.getTotal().getIndexCurrent());
      table.addCell(indexingStats == null ? null : indexingStats.getTotal().getIndexTime());
      table.addCell(indexingStats == null ? null : indexingStats.getTotal().getIndexCount());
      table.addCell(indexingStats == null ? null : indexingStats.getTotal().getIndexFailedCount());

      MergeStats mergeStats = indicesStats == null ? null : indicesStats.getMerge();
      table.addCell(mergeStats == null ? null : mergeStats.getCurrent());
      table.addCell(mergeStats == null ? null : mergeStats.getCurrentNumDocs());
      table.addCell(mergeStats == null ? null : mergeStats.getCurrentSize());
      table.addCell(mergeStats == null ? null : mergeStats.getTotal());
      table.addCell(mergeStats == null ? null : mergeStats.getTotalNumDocs());
      table.addCell(mergeStats == null ? null : mergeStats.getTotalSize());
      table.addCell(mergeStats == null ? null : mergeStats.getTotalTime());

      PercolateStats percolateStats = indicesStats == null ? null : indicesStats.getPercolate();
      table.addCell(percolateStats == null ? null : percolateStats.getCurrent());
      table.addCell(percolateStats == null ? null : percolateStats.getMemorySize());
      table.addCell(percolateStats == null ? null : percolateStats.getNumQueries());
      table.addCell(percolateStats == null ? null : percolateStats.getTime());
      table.addCell(percolateStats == null ? null : percolateStats.getCount());

      RefreshStats refreshStats = indicesStats == null ? null : indicesStats.getRefresh();
      table.addCell(refreshStats == null ? null : refreshStats.getTotal());
      table.addCell(refreshStats == null ? null : refreshStats.getTotalTime());

      ScriptStats scriptStats = stats == null ? null : stats.getScriptStats();
      table.addCell(scriptStats == null ? null : scriptStats.getCompilations());
      table.addCell(scriptStats == null ? null : scriptStats.getCacheEvictions());

      SearchStats searchStats = indicesStats == null ? null : indicesStats.getSearch();
      table.addCell(searchStats == null ? null : searchStats.getTotal().getFetchCurrent());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getFetchTime());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getFetchCount());
      table.addCell(searchStats == null ? null : searchStats.getOpenContexts());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getQueryCurrent());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getQueryTime());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getQueryCount());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getScrollCurrent());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getScrollTime());
      table.addCell(searchStats == null ? null : searchStats.getTotal().getScrollCount());

      SegmentsStats segmentsStats = indicesStats == null ? null : indicesStats.getSegments();
      table.addCell(segmentsStats == null ? null : segmentsStats.getCount());
      table.addCell(segmentsStats == null ? null : segmentsStats.getMemory());
      table.addCell(segmentsStats == null ? null : segmentsStats.getIndexWriterMemory());
      table.addCell(segmentsStats == null ? null : segmentsStats.getIndexWriterMaxMemory());
      table.addCell(segmentsStats == null ? null : segmentsStats.getVersionMapMemory());
      table.addCell(segmentsStats == null ? null : segmentsStats.getBitsetMemory());

      SuggestStats suggestStats = indicesStats == null ? null : indicesStats.getSuggest();
      table.addCell(suggestStats == null ? null : suggestStats.getCurrent());
      table.addCell(suggestStats == null ? null : suggestStats.getTime());
      table.addCell(suggestStats == null ? null : suggestStats.getCount());

      table.endRow();
    }

    return table;
  }