2 files changed, 15 insertions, 3 deletions
diff --git a/app/models/application_setting.rb b/app/models/application_setting.rb
index fbd8036653a..8e558487c1c 100644
--- a/app/models/application_setting.rb
+++ b/app/models/application_setting.rb
@@ -272,4 +272,12 @@ class ApplicationSetting < ApplicationRecord
     # We already have an ApplicationSetting record, so just return it.
     current_without_cache
   end
+
+  # By default, the backend is Rails.cache, which uses
+  # ActiveSupport::Cache::RedisStore. Since loading ApplicationSetting
+  # can cause a significant amount of load on Redis, let's cache it in
+  # memory.
+  def self.cache_backend
+    Gitlab::ThreadMemoryCache.cache_backend
+  end
 end
diff --git a/app/models/concerns/cacheable_attributes.rb b/app/models/concerns/cacheable_attributes.rb
index 3d60f6924c1..8cbf4bcfaf7 100644
--- a/app/models/concerns/cacheable_attributes.rb
+++ b/app/models/concerns/cacheable_attributes.rb
@@ -36,7 +36,7 @@ module CacheableAttributes
     end
 
     def retrieve_from_cache
-      record = Rails.cache.read(cache_key)
+      record = cache_backend.read(cache_key)
       ensure_cache_setup if record.present?
 
       record
@@ -58,7 +58,7 @@ module CacheableAttributes
     end
 
     def expire
-      Rails.cache.delete(cache_key)
+      cache_backend.delete(cache_key)
     rescue
       # Gracefully handle when Redis is not available. For example,
       # omnibus may fail here during gitlab:assets:compile.
@@ -69,9 +69,13 @@ module CacheableAttributes
       # to be loaded when read from cache: https://github.com/rails/rails/issues/27348
       define_attribute_methods
     end
+
+    def cache_backend
+      Rails.cache
+    end
   end
 
   def cache!
-    Rails.cache.write(self.class.cache_key, self, expires_in: 1.minute)
+    self.class.cache_backend.write(self.class.cache_key, self, expires_in: 1.minute)
   end
 end