Lambda 関数の Java ランタイムにて最大ヒープメモリのサイズを指定する方法を教えてください

package example;

import com.amazonaws.services.lambda.runtime.Context;
import com.amazonaws.services.lambda.runtime.LambdaLogger;
import com.amazonaws.services.lambda.runtime.RequestHandler;

import java.util.Map;

import software.amazon.awssdk.services.lambda.LambdaClient;

// Handler value: example.Handler
public class Handler implements RequestHandler<Map<String,String>, String> {

    private static final LambdaClient lambdaClient = LambdaClient.builder().build();

    @Override
    public String handleRequest(Map<String,String> event, Context context) {

        LambdaLogger logger = context.getLogger();
        logger.log("Handler invoked");

        // ヒープメモリ容量を取得
        long maxMem = Runtime.getRuntime().maxMemory();

        logger.log("Runtime.getRuntime().maxMemory():"+maxMem);

        long maxMemM = maxMem/1024/1024;

        // 見やすく整形
        logger.log("Runtime.getRuntime().maxMemory():"+maxMemM+"M");

        return "end";
    }
}