Fix test for 12.2

app/helpers/key_explanation_helper.rb

@@ -1201,6 +1201,7 @@ def other_xml_info_type(type)
     "parse time elapsed" => "Total elapsed time for parsing, in 10s of milliseconds. Subtract \"parse time cpu\" from this statistic to determine the total waiting time for parse resources.",
     "physical maps pmem" => "Number of direct-mapped references acquired from FsDirect. Note that in steady state this is approximately the same as the number of unmaps, because each map requires an unmap (e.g. reuses a PMEM buffer).",
     "physical read bytes" => "Total size in bytes of all disk reads by application activity (and not other instance activity) only.",
+    'physical read total bytes optimized' => "Total number of bytes read from Exadata Smart Flash Cache, and bytes avoided by using storage index or columnar cache.",
     "physical read flash cache hits" => "Total number of reads from flash cache instead of disk",
     "physical read IO requests" => "Number of read requests for application activity (mainly buffer cache and direct load operation) which read one or more database blocks per request. This is a subset of \"physical read total IO requests\" statistic.",
     "physical read requests optimized" => "Number of read requests that read one or more database blocks from the Database Smart Flash Cache or the Exadata Smart Flash Cache.",

app/helpers/menu_helper.rb

@@ -76,7 +76,7 @@ def menu_content
               ]
             },
             { :class=> 'menu', :caption=> 'Segment Statistics', :content=>[
-                {:class=> 'item', :caption=>t(:menu_current_caption, :default=> 'Current'),         :controller=>:dba,          :action=> 'segment_stat',             :hint=>t(:menu_wait_segment_current_hint, :default=> 'Current waits by DB-objects'), min_db_version: '12.2' },
+                {:class=> 'item', :caption=>t(:menu_current_caption, :default=> 'Current'),         :controller=>:dba,          :action=> 'segment_stat',             :hint=>t(:menu_wait_segment_current_hint, :default=> 'Current waits by DB-objects'), min_db_version: '18' },
                 {:class=> 'item', :caption=>t(:menu_historic_caption, :default=> 'Historic'),      :controller=> 'dba_history',  :action=> 'segment_stat_historic',    :hint=>t(:menu_wait_segment_historic_hint, :default=> 'Historic values (waits etc.) by DB-objects')  },
                 ]
             },

test/controllers/dba_controller_test.rb

@@ -137,7 +137,7 @@ class DbaControllerTest < ActionDispatch::IntegrationTest
   end
 
   test "segment_stat with xhr: true"       do
-    if get_db_version >= '12.2'
+    if get_db_version >= '18'
       post '/dba/list_segment_statistics', params: { format: :html, update_area: :hugo, sample_length: 5 }
       assert_response :success