1 files changed, 28 insertions, 0 deletions
diff --git a/lib/gitlab/metrics/system.rb b/lib/gitlab/metrics/system.rb
index 426496855e3..33c0de91c11 100644
--- a/lib/gitlab/metrics/system.rb
+++ b/lib/gitlab/metrics/system.rb
@@ -23,6 +23,22 @@ module Gitlab
         def self.file_descriptor_count
           Dir.glob('/proc/self/fd/*').length
         end
+
+        def self.max_open_file_descriptors
+          match = File.read('/proc/self/limits').match(/Max open files\s*(\d+)/)
+
+          return unless match && match[1]
+
+          match[1].to_i
+        end
+
+        def self.process_start_time
+          fields = File.read('/proc/self/stat').split
+
+          # fields[21] is linux proc stat field "(22) starttime".
+          # The value is expressed in clock ticks, divide by clock ticks for seconds.
+          ( fields[21].to_i || 0 ) / clk_tck
+        end
       else
         def self.memory_usage
           0.0
@@ -31,6 +47,14 @@ module Gitlab
         def self.file_descriptor_count
           0
         end
+
+        def self.max_open_file_descriptors
+          0
+        end
+
+        def self.process_start_time
+          0
+        end
       end
 
       # THREAD_CPUTIME is not supported on OS X
@@ -59,6 +83,10 @@ module Gitlab
       def self.monotonic_time
         Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_second)
       end
+
+      def self.clk_tck
+        @clk_tck ||= `getconf CLK_TCK`.to_i
+      end
     end
   end
 end