# 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

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. applications ..... 25 2.9. Improved documentation ..... 25 I. Core Technologies ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 8.2. Other Spring aspects for AspectJ ..... 136 6.8.3. Configuring AspectJ aspects using Spring IoC ..... 137 6.8.4. Using AspectJ Load-time weaving (LTW) with Spring applications ..... 137 6.9.

..... 2 2. Introduction to the Spring Framework ..... 3 2.1. Dependency Injection and Inversion of Control ..... 3 2.2. Modules ..... 3 Core Container ..... 4 AOP and Instrumentation and server generations ..... 34 Core Technologies ..... 35 7. The IoC container ..... 36 7.1. Introduction to the Spring IoC container and beans ..... 36 7.2. Container overview ..... 36 Configuration lifecycle mechanisms ..... 79 Startup and shutdown callbacks ..... 80 Shutting down the Spring IoC container gracefully in non-web applications ..... 82 ApplicationContextAware and BeanNameAware

2. 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 .. applications .....30 2.9. Improved documentation .....30 I. Core Technologies .....31 3. The IoC container .....32 3.1. Introduction .....32 3.2. Basics - containers and beans .....32 3.2.1 Choosing流体 ..... 249 11.1.2.Thepackagehierarchy ..... 250 11.2.Using the JDBC Core classes to control basic JDBC processing and error handling ..... 250 11.2.1.JdbcTemplate ..... 250 11.2.2.Name

17 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 applications ..... 25 2.9. Improved documentation ..... 25 I. Core Technologies ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2 8.2. Other Spring aspects for AspectJ ..... 139 6.8.3. Configuring AspectJ aspects using Spring IoC ..... 139 6.8.4. Using AspectJ Load-time weaving (LTW) with Spring applications ..... 140 6.9.

17 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 applications ..... 25 2.9. Improved documentation ..... 26 I. Core Technologies ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2 8.2. Other Spring aspects for AspectJ ..... 137 6.8.3. Configuring AspectJ aspects using Spring IoC ..... 138 6.8.4. Using AspectJ Load-time weaving (LTW) with Spring applications ..... 138 6.9.

17 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 applications ..... 25 2.9. Improved documentation ..... 26 I. Core Technologies ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2 8.2. Other Spring aspects for AspectJ ..... 134 6.8.3. Configuring AspectJ aspects using Spring IoC ..... 134 6.8.4. Using AspectJ Load-time weaving (LTW) with Spring applications ..... 135 6.9.

17 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 applications ..... 25 2.9. Improved documentation ..... 26 I. Core Technologies ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 28 3.2 8.2. Other Spring aspects for AspectJ ..... 134 6.8.3. Configuring AspectJ aspects using Spring IoC ..... 134 6.8.4. Using AspectJ Load-time weaving (LTW) with Spring applications ..... 135 6.9.

## CS 591 K1: Data Stream Processing and Analytics Spring 2020 ## 4 /09: Flow control and load shedding Vasiliki (Vasia) Kalavri vkalavri@bu.edu ## Keeping up with the producers • Producers can generate what if the queue grows larger than available memory? • block the producer (back-pressure, flow control) ## Load management approaches ![Image](/uploads/documents/1/8/5/2/1852496083fa00bab53cdd69c80bfbf6/p7_1 runtime and selectively drops tuples according to a QoS specification. • Similar to congestion control or video streaming in a lower quality. ![Image](/uploads/documents/1/8/5/2/1852496083fa00bab53cdd69c80bfbf6/p9_1

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. applications ..... 25 2.9. Improved documentation ..... 25 I. Core Technologies ..... 27 3. The IoC container ..... 28 3.1. Introduction ..... 28 3.2. Basics - containers and beans ..... 8.2. Other Spring aspects for AspectJ ..... 136 6.8.3. Configuring AspectJ aspects using Spring IoC ..... 137 6.8.4. Using AspectJ Load-time weaving (LTW) with Spring applications ..... 138 6.9.