Updated search autoscaling utilization + version bump (dart-lang#9286)

Author: isoos

CHANGELOG.md

@@ -2,6 +2,8 @@ Important changes to data models, configuration, and migrations between each
 AppEngine version, listed here to ease deployment and troubleshooting.
 
 ## Next Release (replace with git tag when deployed)
+ * Bump runtimeVersion to `2026.03.13`.
+ * Note: Started blocking new uploads without `README.md`.
 
 ## `20260312t144500-all`
  * Bump runtimeVersion to `2026.03.10`.

app/lib/shared/versions.dart

@@ -24,10 +24,10 @@ final RegExp runtimeVersionPattern = RegExp(r'^\d{4}\.\d{2}\.\d{2}$');
 /// when the version switch happens.
 const _acceptedRuntimeVersions = <String>[
   // The current [runtimeVersion].
-  '2026.03.10',
+  '2026.03.13',
   // Fallback runtime versions.
+  '2026.03.10',
   '2026.03.06',
-  '2026.02.24',
 ];
 
 /// Sets the current runtime versions.

search.yaml

@@ -27,7 +27,7 @@ automatic_scaling:
   # This metrics is observed to go up to 0.20.
   # Threshold is calibrated to be triggered if the new isolate is starting + the existing is above 50% load.
   cpu_utilization:
-    target_utilization: 0.19
+    target_utilization: 0.175
   # The number of seconds that the autoscaler should wait before it starts collecting information from a new instance.
   # Skipping the collection in the first 20 minutes.
   cool_down_period_sec: 1200