diff --git a/google/spanner/admin/instance/v1/BUILD.bazel b/google/spanner/admin/instance/v1/BUILD.bazel
index 063f7b14..11eddbe8 100644
--- a/google/spanner/admin/instance/v1/BUILD.bazel
+++ b/google/spanner/admin/instance/v1/BUILD.bazel
@@ -63,6 +63,7 @@ java_gapic_library(
     name = "instance_java_gapic",
     src = ":instance_proto_with_info",
     gapic_yaml = "spanner_admin_instance_gapic.yaml",
+    grpc_service_config = "spanner_admin_instance_grpc_service_config.json",
     package = "google.spanner.admin.instance.v1",
     service_yaml = "spanner_admin_instance.yaml",
     test_deps = [
@@ -194,6 +195,7 @@ py_gapic_library(
     name = "instance_py_gapic",
     src = ":instance_proto_with_info",
     gapic_yaml = "spanner_admin_instance_gapic.yaml",
+    grpc_service_config = "spanner_admin_instance_grpc_service_config.json",
     package = "google.spanner.admin.instance.v1",
     service_yaml = "spanner_admin_instance.yaml",
     deps = [
@@ -238,6 +240,7 @@ php_gapic_library(
     name = "instance_php_gapic",
     src = ":instance_proto_with_info",
     gapic_yaml = "spanner_admin_instance_gapic.yaml",
+    grpc_service_config = "spanner_admin_instance_grpc_service_config.json",
     package = "google.spanner.admin.instance.v1",
     service_yaml = "spanner_admin_instance.yaml",
     deps = [
diff --git a/google/spanner/admin/instance/v1/spanner_admin_instance_gapic.yaml b/google/spanner/admin/instance/v1/spanner_admin_instance_gapic.yaml
index 570bc8f5..eb1baae3 100644
--- a/google/spanner/admin/instance/v1/spanner_admin_instance_gapic.yaml
+++ b/google/spanner/admin/instance/v1/spanner_admin_instance_gapic.yaml
@@ -18,54 +18,16 @@ language_settings:
     domain_layer_location: google-cloud
 interfaces:
 - name: google.spanner.admin.instance.v1.InstanceAdmin
-  retry_codes_def:
-  - name: idempotent
-    retry_codes:
-    - UNAVAILABLE
-    - DEADLINE_EXCEEDED
-  - name: non_idempotent
-    retry_codes: []
-  retry_params_def:
-  - name: default
-    initial_retry_delay_millis: 1000
-    retry_delay_multiplier: 1.3
-    max_retry_delay_millis: 32000
-    initial_rpc_timeout_millis: 60000
-    rpc_timeout_multiplier: 1
-    max_rpc_timeout_millis: 60000
-    total_timeout_millis: 600000
   methods:
-  - name: ListInstanceConfigs
-    timeout_millis: 3600000
-  - name: GetInstanceConfig
-    timeout_millis: 3600000
-  - name: ListInstances
-    timeout_millis: 3600000
-  - name: GetInstance
-    timeout_millis: 3600000
   - name: CreateInstance
     long_running:
       initial_poll_delay_millis: 20000
       poll_delay_multiplier: 1.5
       max_poll_delay_millis: 45000
       total_poll_timeout_millis: 86400000
-    timeout_millis: 3600000
   - name: UpdateInstance
     long_running:
       initial_poll_delay_millis: 20000
       poll_delay_multiplier: 1.5
       max_poll_delay_millis: 45000
       total_poll_timeout_millis: 86400000
-    timeout_millis: 3600000
-  - name: DeleteInstance
-    retry_codes_name: idempotent
-    retry_params_name: default
-    timeout_millis: 3600000
-  - name: SetIamPolicy
-    timeout_millis: 30000
-  - name: GetIamPolicy
-    retry_codes_name: idempotent
-    retry_params_name: default
-    timeout_millis: 30000
-  - name: TestIamPermissions
-    timeout_millis: 30000