<section class="grafana-metric-options"><div class="gf-form-group"><div class="gf-form-inline"><div class="gf-form"><span class="gf-form-label"><i class="fa fa-wrench"></i></span> <span class="gf-form-label width-11">Group by time interval</span> <input type="text" class="gf-form-input" ng-model="ctrl.panelCtrl.panel.interval" ng-blur="ctrl.panelCtrl.refresh();" spellcheck="false" placeholder="example: >10s"> <span class="gf-form-label"><i class="fa fa-question-circle" bs-tooltip="'Set a low limit by having a greater sign: example: >60s'" data-placement="right"></i></span></div></div><div class="gf-form-inline"><div class="gf-form"><span class="gf-form-label width-10"><a ng-click="ctrl.panelCtrl.toggleEditorHelp(1);" bs-tooltip="'click to show helpful info'" data-placement="bottom"><i class="fa fa-info-circle"></i> &nbsp;alias patterns </a></span><span class="gf-form-label width-10"><a ng-click="ctrl.panelCtrl.toggleEditorHelp(2)" bs-tooltip="'click to show helpful info'" data-placement="bottom"><i class="fa fa-info-circle"></i> &nbsp;stacking &amp; and fill </a></span><span class="gf-form-label width-10"><a ng-click="ctrl.panelCtrl.toggleEditorHelp(3)" bs-tooltip="'click to show helpful info'" data-placement="bottom"><i class="fa fa-info-circle"></i> &nbsp;group by time</a></span></div></div></div></section><div class="editor-row"><div class="pull-left"><div class="grafana-info-box span6" ng-if="ctrl.panelCtrl.editorHelpIndex === 1"><h5>Alias patterns</h5><ul><li>$m = replaced with measurement name</li><li>$measurement = replaced with measurement name</li><li>$1 - $9 = replaced with part of measurement name (if you separate your measurement name with dots)</li><li>$col = replaced with column name</li><li>$tag_hostname = replaced with the value of the hostname tag</li><li>You can also use [[tag_hostname]] pattern replacement syntax</li></ul></div><div class="grafana-info-box span6" ng-if="ctrl.panelCtrl.editorHelpIndex === 2"><h5>Stacking and fill</h5><ul><li>When stacking is enabled it important that points align</li><li>If there are missing points for one series it can cause gaps or missing bars</li><li>You must use fill(0), and select a group by time low limit</li><li>Use the group by time option below your queries and specify for example &gt;10s if your metrics are written every 10 seconds</li><li>This will insert zeros for series that are missing measurements and will make stacking work properly</li></ul></div><div class="grafana-info-box span6" ng-if="ctrl.panelCtrl.editorHelpIndex === 3"><h5>Group by time</h5><ul><li>Group by time is important, otherwise the query could return many thousands of datapoints that will slow down Grafana</li><li>Leave the group by time field empty for each query and it will be calculated based on time range and pixel width of the graph</li><li>If you use fill(0) or fill(null) set a low limit for the auto group by time interval</li><li>The low limit can only be set in the group by time option below your queries</li><li>You set a low limit by adding a greater sign before the interval</li><li>Example: &gt;60s if you write metrics to InfluxDB every 60 seconds</li></ul></div></div></div>