message: help sqllab forget the past
diff: @@ -8,6 +8,7 @@ const $ = require('jquery');
  const QUERY_UPDATE_FREQ = 2000;
  const QUERY_UPDATE_BUFFER_MS = 5000;
  +const QUERY_POLL_WINDOW = 21600000; // 6 hours.
  class QueryAutoRefresh extends React.PureComponent {
  componentWillMount() {
  @@ -17,11 +18,11 @@ class QueryAutoRefresh extends React.PureComponent {
  this.stopTimer();
  }
  shouldCheckForQueries() {
  - // if there are started or running queries, this method should return true
  + // if there are started or running queries < 6 hours old, this method should return true
  const { queries } = this.props;
  - const queryKeys = Object.keys(queries);
  - const queriesAsArray = queryKeys.map(key => queries[key]);
  - return queriesAsArray.some(q =>
  + return Object.values(queries)
  + .filter(q => (q.startDttm >= this.props.queriesLastUpdate - QUERY_POLL_WINDOW))
  + .some(q =>
  ['running', 'started', 'pending', 'fetching'].indexOf(q.state) >= 0);
  }
  startTimer() {
  @@ -34,7 +35,7 @@ class QueryAutoRefresh extends React.PureComponent {
  this.timer = null;
  }
  stopwatch() {
  - // only poll /superset/queries/ if there are started or running queries
  + // only poll /superset/queries/ if there are started or running queries started <6 hours ago
  if (this.shouldCheckForQueries()) {
  const url = `/superset/queries/${this.props.queriesLastUpdate - QUERY_UPDATE_BUFFER_MS}`;
  $.getJSON(url, (data) => {
  