ifier">app_id</span>)
<span class="ruby-ivar">@start_hour</span>, <span class="ruby-ivar">@end_hour</span>, <span class="ruby-identifier">start_time</span>, <span class="ruby-identifier">end_time</span> = <span class="ruby-identifier">get_start_and_end_time_from_session</span>()    
  <span class="ruby-identifier">percentage_db_usage_graph</span> = <span class="ruby-identifier">plot_graph</span>(<span class="ruby-node">&quot;graph/get_percentage_db_usage_data/#{app_id}?time_slab=#{start_time}.#{end_time}&qu