# Optimization for number of goroutines using feedback control Yusuke MIYAKE / Pepabo R&D Institute, GMO Pepabo, Inc. 2019.07.25 GopherCon 2019 ![Image](/uploads/documents/4/2/d/f/42dfd7f07b1ef4 ## I ssues to solve for the realization 1. Selection of performance metrics 2. Finding how to control rapidly and continuously ## Performance metrics ## Performance metrics • Independent resource type based on the metrics • Continuously • Rapidly • Accurately • Feedback control meets these conditions. ## Feedback control • Tracking a given set-point using errors from the set-point. • Applying

to the Spring Framework ..... 3 2.1. Dependency Injection and Inversion of Control ..... 3 2.2. Modules ..... 3 Core Container ..... 4 AOP and Instrumentation ..... 5 Messaging . 3.4. Java EE 6 and 7 ..... 19 3.5. Groovy Bean Definition DSL ..... 19 3.6. Core Container Improvements ..... 19 3.7. General Web Improvements ..... 20 3.8. WebSocket, SockJS Improvements ..... 24 5. New Features and Enhancements in Spring Framework 4.2 ..... 26 5.1. Core Container Improvements ..... 26 5.2. Data Access Improvements ..... 27 5.3. JMS Improvements

What's new in Spring 2.0 and 2.5? .....21 2.1. Introduction .....21 2.2. The Inversion of Control (IoC) container .....21 2.2.1. New beanscopes .....21 2.2.2. Easier XML configuration .....21 .....31 3. The IoC container .....32 3.1. Introduction .....32 3.2. Basics - containers and beans .....32 3.2.1. The container .....33 3.2.2. Instantiating a container .....34 3.2.3. The The beans .....35 3.2.4. Using the container .....39 3.3. Dependencies .....40 3.3.1. Injecting dependencies .....40 3.3.2. Dependencies and configuration in detail ..... 45 3.3.3. Using depends-on

2. What's new in Spring 2.0? ..... 20 2.1. Introduction ..... 20 2.2. The Inversion of Control (IoC) container ..... 20 2.2.1. Easier XML configuration ..... 20 2.2.2. New bean scopes .... ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2.1. The container ..... 28 3.2.2. Instantiating a container ..... 30 3.2.3. The beans ..... 31 3.2.4. Using the container ..... 35 3.3. Dependencies ..... 36 3.3.1. Injecting dependencies ..... 36 3.3.2. Constructor Argument Resolution ..... 41 3.3.3. Bean properties

2. What's new in Spring 2.0? ..... 20 2.1. Introduction ..... 20 2.2. The Inversion of Control (IoC) container ..... 20 2.2.1. Easier XML configuration ..... 20 2.2.2. New bean scopes .... ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2.1. The container ..... 28 3.2.2. Instantiating a container ..... 30 3.2.3. The beans ..... 31 3.2.4. Using the container ..... 35 3.3. Dependencies ..... 36 3.3.1. Injecting dependencies ..... 36 3.3.2. Constructor Argument Resolution ..... 40 3.3.3. Bean properties

What's new in Spring 2.0? ..... 20 2.1. Introduction ..... 20 2.2. The Inversion of Control (IoC) container ..... 20 2.2.1. Easier XML configuration ..... 20 2.2.2. New bean 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2.1. The container ..... 28 3.2.2. Instantiating a container ..... 30 3.2.3. The beans ..... 31 3.2.4. Using the container ..... 35 3.3. Dependencies ..... 36 3.3.1. Injecting dependencies ..... 36 3.3.2. Constructor Argument

 ## Container Portfolio at VMware 淡成 VMware应用平台架构师 ## Application Velocity and Customization Drive Competitive Advantage a84004dbb3e345ee3fc74e487e8499c5/p2_1.jpg) Software Customization Innovation/Disruption ## Container Technology Key Enabler for Modern Application Development  ## FOR DEVELOPERS: Docker compatible interface Container management portal Enterprise-class container registry ## FOR OPERATIONS: Familiarity of vSphere No new tooling or technologies

2. What's new in Spring 2.0? ..... 20 2.1. Introduction ..... 20 2.2. The Inversion of Control (IoC) container ..... 20 2.2.1. Easier XML configuration ..... 20 2.2.2. New bean scopes .... ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2.1. The container ..... 28 3.2.2. Instantiating a container ..... 30 3.2.3. The beans ..... 31 3.2.4. Using the container ..... 35 3.3. Dependencies ..... 36 3.3.1. Injecting dependencies ..... 36 3.3.2. Constructor Argument Resolution ..... 40 3.3.3. Bean properties

2. What's new in Spring 2.0? ..... 20 2.1. Introduction ..... 20 2.2. The Inversion of Control (IoC) container ..... 20 2.2.1. Easier XML configuration ..... 20 2.2.2. New bean scopes .... ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2.1. The container ..... 28 3.2.2. Instantiating a container ..... 30 3.2.3. The beans ..... 31 3.2.4. Using the container ..... 35 3.3. Dependencies ..... 36 3.3.1. Injecting dependencies ..... 36 3.3.2. Constructor Argument Resolution ..... 41 3.3.3. Bean properties

2. What's new in Spring 2.0? ..... 20 2.1. Introduction ..... 20 2.2. The Inversion of Control (IoC) container ..... 20 2.2.1. Easier XML configuration ..... 20 2.2.2. New bean scopes .... ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2.1. The container ..... 28 3.2.2. Instantiating a container ..... 30 3.2.3. The beans ..... 31 3.2.4. Using the container ..... 35 3.3. Dependencies ..... 36 3.3.1. Injecting dependencies ..... 36 3.3.2. Constructor Argument Resolution ..... 41 3.3.3. Bean properties