java performance tuning and optimization

-brush, List page and detail page anti-brush, seconds kill operation Anti-brush, verification code anti-brush. This chapter introduces some common schemes to prevent spiders or second-kill artifacts.8th Server Optimization (TOMCAT/NGNIX/LVS)Tomcat optimization, Ngnix optimization, LVS four-layer load balancing, lvs+keepalived high-availability optimizationThe 9th

understand and reasonably use the various data structures provided by the JDK itself, the APIs developed by the concurrency program, the IO flow APIs, and so on, familiar with the common design patterns, This includes concurrent programming patterns, because almost all of the Third-party libraries we use are designed based on these APIs and design patterns. In addition, it includes optimizations for the JVM. This series of blogs will describe how to optimize

FineReport performance tuning methods, finereport Performance TuningThe basic idea of FineReport performance optimization is to properly set the memory size of the application server. Generally, the default memory configuration of the server is relatively small. In larger ap

Chapter Source: https://zhuanlan.zhihu.com/p/25539690Java performance optimization, sorting out an article for later restudying.JVM GC (garbage collection Mechanism)Before we learn the Java GC, we need to remember one word: Stop-the-world. It will occur in any GC algorithm. Stop-the-world means that the JVM stops executing the application because it needs to perf

, List page and detail page anti-brush, seconds kill operation Anti-brush, verification code anti-brush. This chapter introduces some common schemes to prevent spiders or second-kill artifacts.8th Server Optimization (TOMCAT/NGNIX/LVS) tomcat optimization, Ngnix optimization, LVS four-layer load balancing, lvs+keepalived high-availability optimizationThe 9th chap

Performance Tuning overview: I. Overview 2. what is performance tuning? (What) 3. Why performance optimization? (Why) 4. When do I need performance

be adjusted to improve the performance of the job immediately. We need to perform a comprehensive analysis of the spark job based on different business scenarios and data conditions, and then adjust and optimize it in many ways to get the best performance.Based on the previous experience of spark job development and the accumulation of practice, the author summarizes a set of performance

know the performance of the problem, such as: insufficient bandwidth, insufficient memory, TCP buffer is not enough, and so on, many times, do not need to adjust the program, only need to adjust the hardware or operating system configuration can be.#p #3.2 Using the profiler testNext, we need to use the performance detection tool, that is, using a profiler to look at the

Java performance optimization, sorting out an article for later restudying.JVM GC (garbage collection Mechanism)Before we learn the Java GC, we need to remember one word:stop-the-world. It will occur in any GC algorithm . Stop-the-world means that the JVM stops executing the application because it needs to perform a GC

applications. Parallel collectors are recommended.The second type is applicable to scenarios involving user UI interaction with high real-time requirements and fast response of programs. For example, some desktop games and some telecommunications exchange systems. We recommend that you use the concurrent collector. ★References◇ GC optimization dataSun provides several instructions on JVM garbage collection optimi