Merge #2342

2342: Cache the API root endpoint for longer. r=tiftran a=smarnach The information at the API root endpoints virtually never changes; it's just a list of endpoints in the API with no dynamic information. At the same time, it's the endpoint we get by far the most requests for. We can reduce the load on the origin servers considerably if we cache this endpoint for a whole day instead of just 30 seconds. Co-authored-by: Sven Marnach <sven@mozilla.com>
mozilla · Dec 2, 2022 · 6bc988d · 6bc988d
2 parents 2e9f25a + 53192d6
commit 6bc988d
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diff --git a/docs/ops/config.rst b/docs/ops/config.rst
@@ -243,6 +243,13 @@ in other Django projects.
     set to 0 in non-production environments to ease testing. In production
     environments, setting this value too low can be a denial-of-service risk.
 
+.. envvar:: DJANGO_API_ROOT_CACHE_TIME
+
+    :default: ``86400`` (1 day)
+
+    The time in seconds to set in cache headers for cacheable API root
+    endpoints.
+
 .. envvar:: DJANGO_API_CACHE_ENABLED
 
     :default: ``True``

diff --git a/normandy/base/api/views.py b/normandy/base/api/views.py
@@ -29,7 +29,7 @@ class APIRootView(APIView):
     exclude_from_schema = True
     urlconf = None
 
-    @api_cache_control(max_age=settings.API_CACHE_TIME)
+    @api_cache_control(max_age=settings.API_ROOT_CACHE_TIME)
     def get(self, request, *args, **kwargs):
         ret = {}
 

diff --git a/normandy/settings.py b/normandy/settings.py
@@ -347,6 +347,7 @@ def RAVEN_CONFIG(self):
     ADMIN_ENABLED = values.BooleanValue(True)
     IMMUTABLE_CACHE_TIME = values.IntegerValue(60 * 60 * 24 * 365)
     NUM_PROXIES = values.IntegerValue(0)
+    API_ROOT_CACHE_TIME = values.IntegerValue(60 * 60 * 24)
     API_CACHE_TIME = values.IntegerValue(30)
     API_CACHE_ENABLED = values.BooleanValue(True)
     PERMANENT_REDIRECT_CACHE_TIME = values.IntegerValue(60 * 60 * 24 * 30)
@@ -440,6 +441,7 @@ class Development(InsecureAuthentication, Base):
     DEFAULT_FILE_STORAGE = values.Value("django.core.files.storage.FileSystemStorage")
 
     API_CACHE_ENABLED = values.BooleanValue(False)
+    API_ROOT_CACHE_TIME = values.IntegerValue(0)
     API_CACHE_TIME = values.IntegerValue(0)
 
     SILENCED_SYSTEM_CHECKS = values.ListValue(["normandy.recipes.E006"])  # geoip db not available