chore: add scaling policy for new index

Author: tstephen-nhs

SAMtemplates/tables/main.yaml

@@ -233,14 +233,14 @@ Resources:
               - TerminalStatus
               - LastModified
               - Status
-                # TODO: Remove this when we deprecate post dated prescriptions.
+              # TODO: Remove this when we deprecate post dated prescriptions.
               - PostDatedLastModifiedSetAt
             ProjectionType: INCLUDE
           ProvisionedThroughput: !If
             - EnableDynamoDBAutoScalingCondition
             - ReadCapacityUnits: 1
               WriteCapacityUnits: !Ref MinWritePrescriptionStatusUpdatesCapacity
-            - !Ref "AWS::NoValue"            
+            - !Ref "AWS::NoValue"
       Tags:
         - Key: "EPS-Tablename"
           Value: "PrescriptionStatusUpdates"
@@ -356,6 +356,56 @@ Resources:
         PredefinedMetricSpecification:
           PredefinedMetricType: DynamoDBReadCapacityUtilization
 
+  PharmacyIndexIncPostDatedScalingWriteTarget:
+    Type: AWS::ApplicationAutoScaling::ScalableTarget
+    Condition: EnableDynamoDBAutoScalingCondition
+    Properties:
+      MinCapacity: !Ref MinWritePrescriptionStatusUpdatesCapacity
+      MaxCapacity: !Ref MaxWritePrescriptionStatusUpdatesCapacity
+      ResourceId: !Sub table/${PrescriptionStatusUpdatesTable}/index/PharmacyODSCodePrescriptionIDIndexIncPostDated
+      RoleARN: !GetAtt DynamoDbScalingRole.Arn
+      ScalableDimension: "dynamodb:index:WriteCapacityUnits"
+      ServiceNamespace: dynamodb
+
+  PharmacyIndexIncPostDatedScalingWritePolicy:
+    Type: AWS::ApplicationAutoScaling::ScalingPolicy
+    Condition: EnableDynamoDBAutoScalingCondition
+    Properties:
+      PolicyName: PharmacyIndexIncPostDatedWriteScalingPolicy
+      PolicyType: TargetTrackingScaling
+      ScalingTargetId: !Ref PharmacyIndexIncPostDatedScalingWriteTarget
+      TargetTrackingScalingPolicyConfiguration:
+        TargetValue: 50
+        ScaleInCooldown: 600
+        ScaleOutCooldown: 0
+        PredefinedMetricSpecification:
+          PredefinedMetricType: DynamoDBWriteCapacityUtilization
+
+  PharmacyIndexIncPostDatedScalingReadTarget:
+    Type: AWS::ApplicationAutoScaling::ScalableTarget
+    Condition: EnableDynamoDBAutoScalingCondition
+    Properties:
+      MaxCapacity: 100
+      MinCapacity: 1
+      ResourceId: !Sub table/${PrescriptionStatusUpdatesTable}/index/PharmacyODSCodePrescriptionIDIndexIncPostDated
+      RoleARN: !GetAtt DynamoDbScalingRole.Arn
+      ScalableDimension: "dynamodb:index:ReadCapacityUnits"
+      ServiceNamespace: dynamodb
+
+  PharmacyIndexIncPostDatedScalingReadPolicy:
+    Type: AWS::ApplicationAutoScaling::ScalingPolicy
+    Condition: EnableDynamoDBAutoScalingCondition
+    Properties:
+      PolicyName: PharmacyIndexIncPostDatedReadScalingPolicy
+      PolicyType: TargetTrackingScaling
+      ScalingTargetId: !Ref PharmacyIndexIncPostDatedScalingReadTarget
+      TargetTrackingScalingPolicyConfiguration:
+        TargetValue: 70
+        ScaleInCooldown: 600
+        ScaleOutCooldown: 10
+        PredefinedMetricSpecification:
+          PredefinedMetricType: DynamoDBReadCapacityUtilization
+
   NHSNumberIndexScalingWriteTarget:
     Type: AWS::ApplicationAutoScaling::ScalableTarget
     Condition: EnableDynamoDBAutoScalingCondition