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‎labs/lab-2-optimize/multithreading/template.yaml‎

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Handler: com.aws.samples.petclinic.CreatePetLambdaHandler::handleRequest
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Runtime: java8
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CodeUri: target/app.jar
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MemorySize: 1024
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MemorySize: 2048
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Environment:
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Variables:
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TABLE_NAME: !ImportValue PetsTable

‎workshop/content/optimize/_index.md‎

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## Overview
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## What are we doing here?
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Take the no DI framework measurements as baseline and see what else we can improve in terms of latency, cold-start and memory consumption.
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## AWS Lambda Power Tuning
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Our goal is to run our AWS Lambda function with a performance optimized configuration, taking cost and scaling into account as well. We are using **[AWS Lambda Power Tuning](https://github.com/alexcasalboni/aws-lambda-power-tuning)** to find the optimal configuration.
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The easiest way is to install it via the **[AWS Serverless Application Repository](https://aws.amazon.com/serverless/serverlessrepo/)** by clicking at this **[link](https://serverlessrepo.aws.amazon.com/applications/arn:aws:serverlessrepo:us-east-1:451282441545:applications~aws-lambda-power-tuning)**.
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A sample visualization with recommendations looks like this:
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![AWS Lambda Power Tuning](optimize/aws-lambda-power-tuning.png)
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In this chapter, we will apply multiple different optimizations and check, whether we can measure a performance improvement with that change.

‎workshop/content/optimize/multithreading/_index.md‎

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java -cp lab-2-optimize/multithreading/target/app.jar -verbose:class com.aws.samples.petclinic.Main | grep '\[class,load\]' | wc -l
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```
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It will report **??? classes got loaded** to execute your AWS Lambda function.
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It will report **4938 classes got loaded** to execute your AWS Lambda function.
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To get a breakdown by package name, run the following command:
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## Memory Configuration
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We choose to go with 1024 MB for the load and performance tests.
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We choose to go with 2048 MB for the load and performance tests.
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{{< figure src="multithreading/power-tuning.png" >}}
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## Run The Load Tests
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‎workshop/content/optimize/multithreading/gatling-1.png‎

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‎workshop/content/optimize/multithreading/gatling-2.png‎

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‎workshop/content/optimize/multithreading/power-tuning.png‎

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‎workshop/content/optimize/multithreading/x-ray.png‎

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‎workshop/content/optimize/summary/_index.md‎

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| Measurement | MIN in ms | P99 in ms | FASTEST COLD-START in ms |
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|-------------------------|-----------|-----------|--------------------------|
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| Python in Lambda | 46 | 156 | 581 |
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| Python in Lambda | 46 | 156 | 581 |
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| Springboot in Lambda | 41 | 11775 | 11500 |
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| **AWS Java SDK v2** | **40** | **4884** | **5000** |
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| | | | |
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| Reduce Dependencies | 37 | 4303 | 4400 |
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| Handler Interface | 41 | 2880 | 4200 |
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| Packaging Mechanism | 40 | 4942 | 5000 |
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| Multithreading | | | |
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| Multithreading | 32 | 120 | 3600 |
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| Java 11 | 42 | 5019 | 4900 |
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| JVM Options | 41 | 5051 | 4900 |
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| Prime Resources | | | |

‎workshop/content/replatform/python-lambda/_index.md‎

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title = "Python Lambda"
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weight = 13
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weight = 12
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pre = ""
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‎workshop/content/replatform/springboot2-lambda/_index.md‎

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title = "Springboot2 Lambda"
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weight = 13
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pre = ""
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