diff --git a/app/models/observer/ticket/user_ticket_counter.rb b/app/models/observer/ticket/user_ticket_counter.rb
index 3f6017e37..69495aca1 100644
--- a/app/models/observer/ticket/user_ticket_counter.rb
+++ b/app/models/observer/ticket/user_ticket_counter.rb
@@ -13,23 +13,55 @@ class Observer::Ticket::UserTicketCounter < ActiveRecord::Observer
   def user_ticket_counter_update(record)
     return if !record.customer_id
 
-    ticket_state_list_open   = Ticket::State.where(
-      :state_type_id => Ticket::StateType.where(
-        :name => ['new','open', 'pending reminder', 'pending action']
-      )
-    )
-    ticket_state_list_closed = Ticket::State.where(
-      :state_type_id => Ticket::StateType.where(
-        :name => ['closed']
-      )
-    )
+    # open ticket count
+    ticket_state_open_ids = Cache.get( 'ticket::state_ids::open' )
+    if !ticket_state_open_ids
+      ticket_state_open_ids = self.state_ids( ['new','open', 'pending reminder', 'pending action'] )
+      Cache.write( 'ticket::state_ids::open', ticket_state_open_ids, { :expires_in => 1.hour } )
+    end
+    tickets_open = Ticket.where(
+      :customer_id     => record.customer_id,
+      :ticket_state_id => ticket_state_open_ids,
+    ).count()
 
-    tickets_open   = Ticket.where( :customer_id => record.customer_id, :ticket_state_id => ticket_state_list_open ).count()
-    tickets_closed = Ticket.where( :customer_id => record.customer_id, :ticket_state_id => ticket_state_list_closed ).count()
+    # closed ticket count
+    ticket_state_closed_ids = Cache.get( 'ticket::state_ids::closed' )
+    if !ticket_state_closed_ids
+      ticket_state_closed_ids = self.state_ids( ['closed'] )
+      Cache.write( 'ticket::state_ids::closed', ticket_state_closed_ids, { :expires_in => 1.hour } )
+    end
+    tickets_closed = Ticket.where(
+      :customer_id     => record.customer_id,
+      :ticket_state_id => ticket_state_closed_ids,
+    ).count()
 
-    customer = User.find( record.customer_id )
-    customer[:preferences][:tickets_open]   = tickets_open
-    customer[:preferences][:tickets_closed] = tickets_closed
-    customer.save
+    # check if update is needed
+    customer = User.lookup( :id => record.customer_id )
+    need_update = false
+    if customer[:preferences][:tickets_open] != tickets_open
+      need_update = true
+      customer[:preferences][:tickets_open]   = tickets_open
+    end
+    if customer[:preferences][:tickets_closed] != tickets_closed
+      need_update = true
+      customer[:preferences][:tickets_closed] = tickets_closed
+    end
+    if need_update
+      customer.save
+    end
   end
+
+  def state_ids(ticket_state_types)
+    ticket_state_types = Ticket::StateType.where(
+        :name => ticket_state_types,
+    )
+    ticket_states = Ticket::State.where( :state_type_id => ticket_state_types )
+    ticket_state_ids = []
+    ticket_states.each {|ticket_state|
+      ticket_state_ids.push ticket_state.id
+    }
+    ticket_state_ids
+  end
+
 end
+