HNT-1889: Reduce backend request volume

merino/curated_recommendations/corpus_backends/scheduled_surface_backend.py

@@ -47,11 +47,11 @@ class ScheduledSurfaceBackend(ScheduledSurfaceProtocol):
     metrics_client: aiodogstatsd.Client
     manifest_provider: ManifestProvider
 
-    # Time-to-live was chosen because 1 minute (+/- 10 s) is short enough that updates by curators
+    # Time-to-live was chosen because 2 minutes (+/- 10 s) is short enough that updates by curators
     # such as breaking news or editorial corrections propagate fast enough, and that the request
     # rate to the scheduledSurface query stays close to the historic rate of ~100 requests/minute.
-    cache_time_to_live_min = timedelta(seconds=50)
-    cache_time_to_live_max = timedelta(seconds=70)
+    cache_time_to_live_min = timedelta(seconds=110)
+    cache_time_to_live_max = timedelta(seconds=130)
     _cache: dict
     _background_tasks: set[asyncio.Task]
 

merino/curated_recommendations/corpus_backends/sections_backend.py

@@ -62,7 +62,7 @@ def __init__(
         self._background_tasks = set()
 
     @stale_while_revalidate(
-        wait_expiration=WaitRandomExpiration(timedelta(seconds=50), timedelta(seconds=70)),
+        wait_expiration=WaitRandomExpiration(timedelta(seconds=110), timedelta(seconds=130)),
         cache=lambda self: self._cache,
         jobs=lambda self: self._background_tasks,
     )