1 files changed, 35 insertions, 0 deletions
diff --git a/lib/gitlab/memory/watchdog/monitor/rss_memory_limit.rb b/lib/gitlab/memory/watchdog/monitor/rss_memory_limit.rb
new file mode 100644
index 00000000000..3e7de024630
--- /dev/null
+++ b/lib/gitlab/memory/watchdog/monitor/rss_memory_limit.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Memory
+    class Watchdog
+      module Monitor
+        class RssMemoryLimit
+          attr_reader :memory_limit
+
+          def initialize(memory_limit:)
+            @memory_limit = memory_limit
+          end
+
+          def call
+            worker_rss = Gitlab::Metrics::System.memory_usage_rss[:total]
+
+            return { threshold_violated: false, payload: {} } if worker_rss <= memory_limit
+
+            { threshold_violated: true, payload: payload(worker_rss, memory_limit) }
+          end
+
+          private
+
+          def payload(worker_rss, memory_limit)
+            {
+              message: 'rss memory limit exceeded',
+              memwd_rss_bytes: worker_rss,
+              memwd_max_rss_bytes: memory_limit
+            }
+          end
+        end
+      end
+    end
+  end
+end