--- a/lib/extensions/mongrel.rb
+++ b/lib/extensions/mongrel.rb
@@ -3,9 +3,9 @@ module Extensions
     
     def start(handle)
       @port       = find_free_port      
-      @root_path  = "/Users/andreas/ruby/twinity"
+#      @root_path  = "/Users/andreas/ruby/twinity"
 #      @root_path  = "/Users/andreas/ruby/dudespectiva"
-#      @root_path  = "/Users/andreas/ruby/tools/dynablaster/extra/test_app"
+      @root_path  = "/Users/andreas/ruby/tools/dynablaster/extra/test_app"
       @pid_path   = @root_path + "/tmp/pids/mongrel.#{@port}.pid"      
       `/usr/bin/env mongrel_rails start -p #{@port} -e development -d -c #{@root_path} -P #{@pid_path}`
     end

--- a/marvin/app/models/slice.rb
+++ b/marvin/app/models/slice.rb
@@ -7,10 +7,10 @@ class Slice < ActiveRecord::Base
       app.stats.find(:all, :conditions => {:added_to_slice => false}).each do |stat|
         ((stat.request_end - stat.request_start) / 60).ceil.times do |t|
           slice_time = stat.request_start + (60 * t)
-          slice_time = slice_time - slice_time.sec
+          slice_time = Time.at(slice_time) - Time.at(slice_time).sec
           slice = Slice.find_or_create_by_slice_from(slice_time)
           slice.app = app
-          slice.increment(:concurrent_requests)
+          slice.update_attribute(:concurrent_requests, stat.find_concurrent_stats)
           slice.slice_from = slice_time
           slice.save
           stat.update_attribute(:added_to_slice, true)

--- a/marvin/app/models/stat.rb
+++ b/marvin/app/models/stat.rb
@@ -5,8 +5,17 @@ class Stat < ActiveRecord::Base
     return unless app
     stat = Stat.create({
       :app => app,
-      :request_start => start_time,
-      :request_end => end_time
+      :request_start => start_time.to_f,
+      :request_end => end_time.to_f
     })
   end
+  
+  def find_concurrent_stats
+    conditions = []
+    conditions << "(#{self.request_start} < request_start AND #{self.request_end} > request_end)"
+    conditions << "(#{self.request_start} > request_start AND #{self.request_end} < request_end)"
+    conditions << "(#{self.request_start} < request_start AND #{self.request_end} > request_start)"
+    conditions << "(#{self.request_start} > request_start AND #{self.request_end} > request_end)"
+    Stat.find(:all, :conditions => "id <> #{self.id} AND #{conditions.join(" OR ")}").size
+  end
 end

Binary files /dev/null and b/marvin/db/development.sqlite3 differ

--- a/marvin/db/migrate/002_create_stats.rb
+++ b/marvin/db/migrate/002_create_stats.rb
@@ -3,7 +3,7 @@ class CreateStats < ActiveRecord::Migration
     create_table :stats do |t|
       t.integer   :app_id
       t.boolean   :added_to_slice, :default => false
-      t.timestamp :request_start, :request_end
+      t.float     :request_start, :request_end
     end
   end