Ceilometer的数据采集agent会定期对nova/keystone/neutron/cinder等服务调用其API的获取信息,默认是20秒一次, # Polling interval for pipeline file configuration in seconds. # (integer value) #pipeline_polling_interval = 这在大规模部署中会对OpenStack服务节点造成很大压力,增加节点CPU负载. 在Ceilometer的L版本中有一个针对性…

Amazon CEO and brilliant prick Jeff Bezos seems to have lost his magic touch lately. Investors, employees, and authors are all lashing out against different elements of Bezos' business practices. Don't worry, Jeff: Amazon has just the thing to improv…

原文地址:http://www.codeproject.com/Tips/1023621/SQL-Performance-Improvement-Techniques This article provides various options to improve the performance in database. 1) Re-Write Query: If any query is taking much time to execute then the first step is to…

BACKGROUND OF THE INVENTION A conventional virtual-machine monitor (VMM) typically runs on a computer and presents to other software the abstraction of one or more virtual machines. Each virtual machine may function as a self-contained platform, runn…

Summary Spark does not have a good mechanism to select reasonable RDDs to cache their partitions in limited memory.  --> Propose a novel selection algorithm, by which Spark can automatically select the RDDs to cache their partitions in memory accordi…

一.简单介绍ceilometer 这里长话短说, ceilometer是用来采集openstack下面各种资源的在某一时刻的资源值,比如云硬盘的大小等.下面是官网现在的架构图 这里除了ceilometer的架构图,还有另外三个组件: Panko 用来存储事件的, 后面用来实现cloudkitty事件秒级计费也是我的工作之一,目前实现来一部分,有时间单独在写一篇博文. gnocchi是用来存储ceilometer的计量数据,之前的版本是存在mongo中, 不过随着计量数据的不断累计, 查询性能变得…

http://queue.acm.org/detail.cfm?id=1854041 The July/August issue of acmqueue is out now acmqueue is free for ACM professional members. Non-members can purchase an annual subscription for $19.99 or a single issue for $6.99. Download the app from iTune…

转自:http://www.alexecollins.com/spring-boot-performance/ 官方优化文档: https://spring.io/blog/2015/12/10/spring-boot-memory-performance SPRING BOOT PERFORMANCE This is an article on how to improve the performance of Spring Boot applications. I've recently b…

本文转自:https://www.mgt-commerce.com/blog/magento-on-steroids-best-practice-for-highest-performance/ There are plenty of blog posts with tips how to increase the performance of a magento store this shows us how important the speed of a magento store is.…

ASP.NET Web API is a great piece of technology. Writing Web API is so easy that many developers don’t take the time to structure their applications for great performance. In this article, I am going to cover 8 techniques for improving ASP.NET Web API…