Introduce: Process Explorer is an advanced process management utility that picks up where Task Manager leaves off. It will show you detailed information about a process including its icon, command-line, full image path, memory statistics, user accoun…

http://www.programcreek.com/2013/04/jvm-run-time-data-areas/ This is my note of reading JVM specification. I draw a diagram which helps me understand. 1. Data Areas for Each Individual Thread (not shared) Data Areas for each individual thread include…

自己项目中使用到了 Runtime rt = Runtime.getRuntime(); Process p = rt.exec("query session");p.waitFor(); 结果在不同的windows 操作系统中,程序的运行不一致,在windows server 2008上可以很好的运行,但是到了windows7上去卡死了!!!!!!!!!!!!!!!!!!!!!! p.waitFor() 卡死了或者报错: [ERROR] xxxxx Thread-0 - Cannot…

小结: 1.当被调函数返回主调函数时,被调函数的 活动记录-activation record / 堆栈帧-stack frame 被 弹出-popping 程序执行栈-program execution stack / 函数调用栈-function call stack. 函数调用堆栈及活动记录 想了解函数调用的实现细节,首先需要认识一种被称为堆栈(stack)的数据结构(即一个关联数据项的集合).我们可以将堆栈想像成一摞盘子.当我们想放一只盘子时,通常是将这只盘子放在这一摞盘子的顶部,相当于…

通过阅读这篇文章对内存的处理以及栈的扩容有了新的认识,我们在生产环境中也遇到了内存使用量超大的情况,现在怀疑也可能是由于栈扩容导致的 很好的一片文章: 推送在外卖订餐中扮演着重要的角色,为商家实时接单.骑手实时派单提供基础的数据通道.早期推送是由第三方服务商提供的, 随着业务复杂度的提升.订单量和用户数的持续增长,之前的系统已经远远不能满足需求,构建一个高性能.高可用的推送系统势在必行. 今年上半年我们用go开发了一个hybrid push服务,用户在线则借助长连接下发消息,不在线则借助厂商或第…

1 Function Programming languages make functions easy to maintain and write by giving each function its own section of memory to operate in. For example, suppose you have the following function. int pickMin( int x, int y, int z ) { int min = x ; if (…

最近在学习算法基础,本篇文章作为一个记录,也算是一次实践和总结.(顺便也深入C#运行时学习一下) 目录 1. 栈是什么 2. Stack 自定义实现 3. Stack C#官方实现 4. 区别 5. 总结 1. 栈是什么 栈是一种特殊的线性表(数据逻辑结构中的一种,定义是其组成元素之间具有线性关系的一种线性结构),其插入和删除操作只能在一端进行. 1 个人理解: 2 是一种最基本的数据结构,数据结构方面必须夯实的基础知识 特征(也可以说是应用场景): 后进先出(队列则为先进先出) 2. Stac…

http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…

1.2. The Java "White Paper" BuzzwordsThe authors of Java have written an influential White Paper that explains their design goals and accomplishments. They also published a shorter summary that is organized along the following 11 buzzwords:1. Si…

一.The way of the program problem solving: The process of formulating a problem, finding a solution, and expressing the solution. high-level language: A programming language like Python that is designed to be easy for humans to read and write. low-leve…