https://github.com/LucaCanali http://cern.ch/canali/…

Luca Canali on 21 Jan 2016 Topic: this post is about Linux perf and uprobes for tracing and profiling Oracle workloads for advanced troubleshooting. Context The recent progress and maturity of some of the Linux dynamic tracing tools has raised intere…

Luca Canali on 26 May 2016 Topic: In this post you will find a short discussion and pointers to the code of a few sample scripts that I have written using Linux BPF/bcc and uprobes for Oracle tracing. Previous work and motivations Tools for dynamic t…

https://db-blog.web.cern.ch/blog/luca-canali/2014-12-life-oracle-io-tracing-logical-and-physical-io-systemtap Luca Canali on 01 Dec 2014 Topic: This post is about tracing logical and physical reads in Oracle using SystemTap. You find here a few examp…

Luca Canali on 28 Jul 2015 Topic: this post is about some simple tools and techniques that can be used to drill down high-latency I/O events using SystemTap probes. The problem: Operations with high latency on a filesystem and/or a storage volume can…

俗话说学以致用,本系列的出发点就在于总结C#和C++的一些新特性,并给出实例说明这些新特性的使用场景.前几篇文章将以C#的新特性为纲领,并同时介绍C++中相似的功能的新特性,最后一篇文章将总结之前几篇没有介绍到的C++11的新特性. C++从11开始被称为现代C++(Modern C++)语言,开始越来越不像C语言了.就像C#从3.0开始就不再像Java了.这是一种超越,带来了开发效率的提高. 一种语言的特性一定是与这种语言的类型和运行环境是分不开的,所以文章中说C#的新特性其中也包括新的.NE…

Atitit各种SDM 软件开发过程SDP sdm的ddd tdd bdd设计 1.1. software development methodology (also known as SDM 1 1.2. 历史1 1.3. 常见方法2 1.4.  DDD Domain Drive Design,也就是领域驱动开发.2 1.5. Tdd TDD(测试驱动开发(Test-Driven Development)3 1.6. TFD -- Test First Development)3 1.7. B…

在疯狂java中,多态是这样解释的: 多态:相同类型的变量,调用同一个方法时,呈现出多中不同的行为特征, 这就是多态. 加上下面的解释:(多态四小类:强制的,重载的,参数的和包含的) 同时, 还用人这解释: 多态性是Java面向对象的一个重要机制,本文将向您详细介绍Java语言中多态性的实现原理和方法,通过多态一点带出更多Java面向对象有趣而实用的知识. 多态性是面向对象程序设计代码重用的一个重要机制,我们曾不只一次的提到Java多态性.在Java运行时多态性:继承和接口的实现一文中,我们曾详…

This article come from HEREARS-L1: Learning Tuesday 10:30–12:30; Oral Session; Room: Leonard de Vinci 10:30  ARS-L1.1—GROUP STRUCTURED DIRTY DICTIONARY LEARNING FOR CLASSIFICATION Yuanming Suo, Minh Dao, Trac Tran, Johns Hopkins University, USA; Hojj…

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