读书笔记系列之java性能优化权威指南 一 第一章
主题：java性能优化权威指南 pdf
版本：英文版 Java Performance Tuning
忽略：（0~24页）Performance+Acknowledge
1、Strategies, Approaches, and Methodologies.
三层境界：
1.i don't know what i don't know.
2.i know what i don't know.
3.i already know what i need to know.
两种方法：
Two different performance tuning approaches, top down and buttom up.
2、软件development过程中缺乏performance的analysis和testing。
1.Software development：analysis, design, coding and testing. but give little a attention to performance and scalability.
2.Today many application under development utilize automated build and test procedures. it should integrating performance testing into automated build processes testing system.
3、Two Approaches, Top Down and Bottom up.
1.top down, the most common approach utlized for performance tuning.step one:Monitoring the application while it is running under a load of particular interest.(Monitoring activity include observing OS, JVM, Java EE container)
2.bottom up, it is improve the performance of an application on one platform relative to another platform(diffreenes exists in the underlying CPU, CPU architecture, number of CPUs).the focus of the bottom up approach is usually to improve the utilization of the CPU without making changes to the application.
最新文章
- 剑指Offer面试题：7.旋转数组的最小数字
- 通过python将图片生成字符画
- 为什么数据可以从pl/sql查出来而使用ado.net查询，结果却是空？
- MySQL DBA 刚入职时如何快速拥抱新的环境
- iOS 添加占位符
- javascript中的简单三角函数
- cidaemon.exe是什么进程及怎样关闭cidaemon.exe进程
- C# 号码归属地查询算法（根据Android来电归属地二进制文件查询修改）
- 通过该源码修改vim颜色和pudb调试器的代码颜色的方法
- oracle12c创建用户提示ORA-65096：公用用户名或角色无效
- Docker命令详解（run篇）
- 【题解】 bzoj1076: [SCOI2008]奖励关 （装压+期望dp）
- snmp信息的查询命令snmpwalk
- win10下安装redis 服务
- [LeetCode] 787. Cheapest Flights Within K Stops_Medium tag: Dynamic Programming, BFS, Heap
- Django小示例
- Metropolis(多源点最短路)
- Effective STL 学习笔记： 多用 vector & string
- 【转】ViewPager 一屏显示多个子页面
- 汇编_指令_XCHG