#### Metrics in ServiceComb Java Chassis 1.0.0-m1 让微服务运行状态清晰可见 郑扬勇 微服务架构师 开源能力中心 ## 目录 • Metrics简介 • 基于BMI示例演示 • Metrics技术细节 ## Metrics是什么 - 直译是 “度量”， 不同的领域定义有所区别， 在微服务领域中的定义： “对微服务的某个指标给予一个可量化程度的测量” “对微服务的某个指标给予一个可量化程度的测量” • Metrics应该具备的特性: - Comparative（可对比）：指标能够在不同的微服务或同一个微服务的多个实例之间比较； • Understandable（易理解）：指标所衡量的对象、计算方法和输出的结果值都是容易理解的； • Ratio（理想的比例）：理想结果可预见，可以立即用于比较。 ## 最常见的Metrics - 衡量Metrics实现优劣的标准： - 无侵入或低侵入  ## Metrics的分类 • Metrics有很多种分类方式，在技术实现上我们偏向以取值方式区分为两种： • 1. 直接取值 - 任何时候都能够立刻获取到最新值，例如资源使用率，包括CPU使用率，线程数，Heap使用数据

Ubuntu Server is a version of the Ubuntu operating system designed and engineered as a backbone for the internet. Ubuntu Server brings economic and technical scalability to your datacentre, public or Ubuntu Server delivers the best value scale-out performance available. ## I n this documentation |Tutorials|How-to guides| |---|---| |Get started - a hands-on introduction to Ubuntu Server for new key topics|Technical information - package specifications, APIs,| ## Project and community Ubuntu Server is a member of the Ubuntu family. It’s an open source project that welcomes community projects, contributions

Ubuntu Server Guide ## Ubuntu Server Guide Copyright $ \copyright $ 2018 Contributors to the document ## Abstract Welcome to the Ubuntu Server Guide! It contains information on how to install and and configure various server applications on your Ubuntu system to fit your needs. It is a step-by-step, task-oriented guide for configuring and customizing your system. ## Credits and License This document this document are: • Members of the Ubuntu Documentation Project $ ^{2} $ • Members of the Ubuntu Server Team $ ^{3} $ • Contributors to the Community Help Wiki $ ^{4} $ • Other contributors can be

## Creating a Sender/Receiver HTTP Server ## DIETMAR KÜHL 20 24 September 15 - 20 ## Objective • Create a basic HTTP server. • Allow a single-threaded server handling multiple clients. • Use the

# Apache HTTP Server Documentation Version 2.0  Apache Software Foundation February 3, 2014 ## About The PDF Documentation copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ ^{T} $ EX using XSLT with the help of Apache the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.0/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

# Apache HTTP Server Documentation Version 2.2  Apache Software Foundation January 15, 2017 ## About The PDF Documentation copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ ^{T} $ EX using XSLT with the help of Apache the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.2/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

Apache HTTP Server Documentation Version 2.4 Apache Software Foundation October 3, 2017 ## About The PDF Documentation Licensed to the Apache Software Foundation (ASF) under one or more contributor copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ ^{T} $ EX using XSLT with the help of Apache the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

# Apache HTTP Server Documentation Version 2.4  Apache Software Foundation March 13, 2014 ## About The PDF Documentation copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ ^{T} $ EX using XSLT with the help of Apache the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

Apache HTTP Server Documentation Version 2.4 Apache Software Foundation March 21, 2018 ## About The PDF Documentation Licensed to the Apache Software Foundation (ASF) under one or more contributor license copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ ^{T} $ EX using XSLT with the help of Apache the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information

# Apache HTTP Server Documentation Version 2.4  Apache Software Foundation February 3, 2014 ## About The PDF Documentation copy of the License at http://www.apache.org/licenses/LICENSE-2.0 This version of the Apache HTTP Server Documentation is converted from XML source files to L $ ^{T} $ EX using XSLT with the help of Apache the documentation on the Apache HTTP Server website at http://httpd.apache.org/docs/2.4/ The Apache HTTP Server Documentation is maintained by the Apache HTTP Server Documentation Project. More information