Someone

<% cache(:action_suffix=>'left_column') do %>
<%= render :partial=>'shared/left_column' %>
<% end %>
<div id="middlec">
    <% if @user.guest? %>
    <%= render :partial=>'shared/infoPanel' %> <br/>
    <% end %>
                <% cache(:action_suffix=>'main_column') do %>
    <%= render :partial=>'shared/mainInfoPanel' %>
    <br/>
    <%= render :partial=>'shared/articlesPanel' %>
                <% end %>
</div>
<% cache(:action_suffix=>'right_column') do %>
<%= render :partial=>'shared/right_column' %>
<% end %>