Activating and managing Lambda SnapStart

To use SnapStart, activate SnapStart on a new or existing Lambda function. Then, publish and invoke a function version.

Activating SnapStart (console)

Open the Functions page of the Lambda console.
Choose the name of a function.
Choose Configuration, and then choose General configuration.
On the General configuration pane, choose Edit.
On the Edit basic settings page, for SnapStart, choose Published versions.
Choose Save.
Publish a function version. Lambda initializes your code, creates a snapshot of the initialized execution environment, and then caches the snapshot for low-latency access.
Invoke the function version.

Update the function configuration by running the update-function-configuration command with the --snap-start option.


aws lambda update-function-configuration \
  --function-name my-function \
  --snap-start ApplyOn=PublishedVersions

Publish a function version with the publish-version command.


aws lambda publish-version \
  --function-name my-function

Confirm that SnapStart is activated for the function version by running the get-function-configuration command and specifying the version number. The following example specifies version 1.