Service Cloud Voice Implementation Guide

Overview
Contact Flows
Examples of Common Use Cases
Lambda Functions
How to Use Lambda Functions
InvokeTelephonyIntegrationApi
Keep Lambda Warm
InvokeSalesforceRestApi
kvsConsumerTrigger
kvsTranscriber
CTRDataSyncFunction
Authentication
Telephony Integration REST API
Toolkit API
Connect API to Update Transcripts
Limits and Scaling
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Keep the InvokeTelephonyIntegrationApiFunction Lambda Function Warm

When a Lambda function hasn’t been invoked after a period of time, the AWS framework unloads the function from memory. The next time the function is invoked, it is “cold” and takes longer to load into memory. This delay can cause a timeout in the contact flow. These instructions describe how to keep your Lambda function “warm” using a Lambda function trigger.
  1. In Amazon Connect, search for the Lambda function page.

    Search for Lambda

  2. From the AWS Lambda function page, select the InvokeTelephonyIntegrationApiFunction Lambda function.

    List of lambda functions

    The Lambda function has your contact center name as the prefix.

    Note

  3. Copy the name of the function to your clipboard so that you can create a unique name for your rule later.
  4. From the function overview page, select the Configuration tab (1). Click the Triggers subtab in the sidebar (2). To create a trigger, click the Add trigger button (3).

    Add trigger button

  5. From the Trigger configuration page, search for the EventBridge trigger and select it.

    EventBridge trigger

  6. Set up your trigger so that it runs every five minutes using the following values.

    Trigger configuration

    1. For the Rule, select Create a new rule.
    2. For the Rule name, specify something globally unique. We suggest the prefix “WarmEvent-” plus the unique name of your InvokeTelephonyIntegrationApiFunction Lambda function that you previously copied to the clipboard.
    3. For the Rule type, specify Schedule expression.
    4. For the schedule expression, specify rate(5 minutes). This expression ensures that the Lambda is called every five minutes.
    5. To add this new trigger, click the Add button.
The InvokeTelephonyIntegrationApiFunction Lambda function automatically detects when it’s being executed by a scheduled event trigger and only performs enough processing to stay warm.