diff --git a/lib/redistat/event.rb b/lib/redistat/event.rb
index 54cb936..f22b162 100644
--- a/lib/redistat/event.rb
+++ b/lib/redistat/event.rb
@@ -31,7 +31,10 @@ module Redistat
     end
 
     def default_options
-      { :depth => :hour, :store_event => false, :connection_ref => nil }
+      { :depth => :hour,
+        :store_event => false,
+        :connection_ref => nil,
+        :enable_grouping => true }
     end
     
     def new?
@@ -72,7 +75,7 @@ module Redistat
     
     def save
       return false if !self.new?
-      Summary.update_all(@key, @stats, depth_limit, @connection_ref)
+      Summary.update_all(@key, @stats, depth_limit, @connection_ref, @options[:enable_grouping])
       if @options[:store_event]
         @id = self.next_id
         db.hmset("#{self.scope}#{KEY_EVENT}#{@id}",
diff --git a/lib/redistat/summary.rb b/lib/redistat/summary.rb
index e955812..f1b50ce 100644
--- a/lib/redistat/summary.rb
+++ b/lib/redistat/summary.rb
@@ -2,9 +2,10 @@ module Redistat
   class Summary
     include Database
     
-    def self.update_all(key, stats = {}, depth_limit = nil, connection_ref = nil)
+    def self.update_all(key, stats = {}, depth_limit = nil, connection_ref = nil, enable_grouping = nil)
       stats ||= {}
-      stats = inject_group_summaries(stats)
+      enable_grouping = true if enable_grouping.nil?
+      stats = inject_group_summaries(stats) if enable_grouping
       depth_limit ||= key.depth
       return nil if stats.size == 0
       Date::DEPTHS.each do |depth|
diff --git a/spec/summary_spec.rb b/spec/summary_spec.rb
index 3c05635..fb1db67 100644
--- a/spec/summary_spec.rb
+++ b/spec/summary_spec.rb
@@ -67,4 +67,14 @@ describe Redistat::Summary do
     summary["visitors/us"].should == "4"
   end
   
+  it "should not store key group summaries when option is disabled" do
+    stats = {"views" => 3, "visitors/eu" => 2, "visitors/us" => 4}
+    Redistat::Summary.update_all(@key, stats, :hour, nil, false)
+    summary = db.hgetall(@key.to_s(:hour))
+    summary.should have(3).items
+    summary["views"].should == "3"
+    summary["visitors/eu"].should == "2"
+    summary["visitors/us"].should == "4"
+  end
+  
 end