diff --git a/src/applications/multimeter/controller/MultimeterSampleController.php b/src/applications/multimeter/controller/MultimeterSampleController.php
index b476db3113..ee707c34db 100644
--- a/src/applications/multimeter/controller/MultimeterSampleController.php
+++ b/src/applications/multimeter/controller/MultimeterSampleController.php
@@ -1,85 +1,194 @@
 <?php
 
 final class MultimeterSampleController extends MultimeterController {
 
   public function shouldAllowPublic() {
     return true;
   }
 
   public function handleRequest(AphrontRequest $request) {
     $viewer = $this->getViewer();
 
+    $group_map = array(
+      'type' => 'eventType',
+      'host' => 'eventHostID',
+      'context' => 'eventContextID',
+      'viewer' => 'eventViewerID',
+      'request' => 'requestKey',
+      'label' => 'eventLabelID',
+    );
+
+    $group = explode('.', $request->getStr('group'));
+    $group = array_intersect($group, array_keys($group_map));
+    $group = array_fuse($group);
+
+    if (empty($group['type'])) {
+      $group['type'] = 'type';
+    }
+
+    $now = PhabricatorTime::getNow();
+    $ago = ($now - phutil_units('24 hours in seconds'));
+
     $table = new MultimeterEvent();
     $conn = $table->establishConnection('r');
     $data = queryfx_all(
       $conn,
-      'SELECT * FROM %T ORDER BY id DESC LIMIT 100',
-      $table->getTableName());
+      'SELECT *, count(*) N, SUM(sampleRate * resourceCost) as totalCost
+        FROM %T
+        WHERE epoch >= %d AND epoch <= %d
+        GROUP BY %Q
+        ORDER BY totalCost DESC, MAX(id) DESC
+        LIMIT 100',
+      $table->getTableName(),
+      $ago,
+      $now,
+      implode(', ', array_select_keys($group_map, $group)));
 
     $this->loadDimensions($data);
 
     $rows = array();
     foreach ($data as $row) {
+
+      if (isset($group['request'])) {
+        $request_col = $row['requestKey'];
+      } else {
+        $request_col = $this->renderGroupingLink($group, 'request');
+      }
+
+      if (isset($group['viewer'])) {
+        $viewer_col = $this->getViewerDimension($row['eventViewerID'])
+          ->getName();
+      } else {
+        $viewer_col = $this->renderGroupingLink($group, 'viewer');
+      }
+
+      if (isset($group['context'])) {
+        $context_col = $this->getContextDimension($row['eventContextID'])
+          ->getName();
+      } else {
+        $context_col = $this->renderGroupingLink($group, 'context');
+      }
+
+      if (isset($group['host'])) {
+        $host_col = $this->getHostDimension($row['eventHostID'])
+          ->getName();
+      } else {
+        $host_col = $this->renderGroupingLink($group, 'host');
+      }
+
+      if (isset($group['label'])) {
+        $label_col = $this->getLabelDimension($row['eventLabelID'])
+          ->getName();
+      } else {
+        $label_col = $this->renderGroupingLink($group, 'label');
+      }
+
       $rows[] = array(
-        $row['id'],
-        $row['requestKey'],
-        $this->getViewerDimension($row['eventViewerID'])->getName(),
-        $this->getContextDimension($row['eventContextID'])->getName(),
-        $this->getHostDimension($row['eventHostID'])->getName(),
+        ($row['N'] == 1)
+          ? $row['id']
+          : pht('%s Events', new PhutilNumber($row['N'])),
+        $request_col,
+        $viewer_col,
+        $context_col,
+        $host_col,
         MultimeterEvent::getEventTypeName($row['eventType']),
-        $this->getLabelDimension($row['eventLabelID'])->getName(),
+        $label_col,
         MultimeterEvent::formatResourceCost(
           $viewer,
           $row['eventType'],
-          $row['resourceCost']),
+          $row['totalCost']),
         $row['sampleRate'],
         phabricator_datetime($row['epoch'], $viewer),
       );
     }
 
     $table = id(new AphrontTableView($rows))
       ->setHeaders(
         array(
           pht('ID'),
           pht('Request'),
           pht('Viewer'),
           pht('Context'),
           pht('Host'),
           pht('Type'),
           pht('Label'),
           pht('Cost'),
           pht('Rate'),
           pht('Epoch'),
         ))
       ->setColumnClasses(
         array(
-          null,
+          'n',
           null,
           null,
           null,
           null,
           null,
           'wide',
           'n',
           'n',
           null,
         ));
 
     $box = id(new PHUIObjectBoxView())
-      ->setHeaderText(pht('Samples'))
+      ->setHeaderText(
+        pht(
+          'Samples (%s - %s)',
+          phabricator_datetime($ago, $viewer),
+          phabricator_datetime($now, $viewer)))
       ->appendChild($table);
 
     $crumbs = $this->buildApplicationCrumbs();
-    $crumbs->addTextCrumb(pht('Samples'));
+    $crumbs->addTextCrumb(pht('Samples'), $this->getGroupURI(array()));
+
+    $crumb_map = array(
+      'host' => pht('By Host'),
+      'context' => pht('By Context'),
+      'viewer' => pht('By Viewer'),
+      'request' => pht('By Request'),
+      'label' => pht('By Label'),
+    );
+
+    $parts = array();
+    foreach ($group as $item) {
+      if ($item == 'type') {
+        continue;
+      }
+      $parts[$item] = $item;
+      $crumbs->addTextCrumb(
+        idx($crumb_map, $item, $item),
+        $this->getGroupURI($parts));
+    }
 
     return $this->buildApplicationPage(
       array(
         $crumbs,
         $box,
       ),
       array(
         'title' => pht('Samples'),
       ));
   }
 
+  private function renderGroupingLink(array $group, $key) {
+    $group[] = $key;
+    $uri = $this->getGroupURI($group);
+
+    return phutil_tag(
+      'a',
+      array(
+        'href' => $uri,
+        'style' => 'font-weight: bold',
+      ),
+      pht('(All)'));
+  }
+
+  private function getGroupURI(array $group) {
+    unset($group['type']);
+    $uri = clone $this->getRequest()->getRequestURI();
+    $uri->setQueryParam('group', implode('.', $group));
+    return $uri;
+  }
+
+
 }