name : update-function-configuration.rst **To modify the configuration of a function** The following ``update-function-configuration`` example modifies the memory size to be 256 MB for the unpublished ($LATEST) version of the ``my-function`` function. :: aws lambda update-function-configuration \ --function-name my-function \ --memory-size 256 Output:: { "FunctionName": "my-function", "LastModified": "2019-09-26T20:28:40.438+0000", "RevisionId": "e52502d4-9320-4688-9cd6-152a6ab7490d", "MemorySize": 256, "Version": "$LATEST", "Role": "arn:aws:iam::123456789012:role/service-role/my-function-role-uy3l9qyq", "Timeout": 3, "Runtime": "nodejs10.x", "TracingConfig": { "Mode": "PassThrough" }, "CodeSha256": "5tT2qgzYUHaqwR716pZ2dpkn/0J1FrzJmlKidWoaCgk=", "Description": "", "VpcConfig": { "SubnetIds": [], "VpcId": "", "SecurityGroupIds": [] }, "CodeSize": 304, "FunctionArn": "arn:aws:lambda:us-west-2:123456789012:function:my-function", "Handler": "index.handler" } For more information, see `AWS Lambda Function Configuration <https://docs.aws.amazon.com/lambda/latest/dg/resource-model.html>`__ in the *AWS Lambda Developer Guide*.