java application performance

heap and stack size. To improve Java performance, first find the bottleneck that affects Java performance (B ottlenecks). After confirming the rationality of the design, adjust the Java deployment environment, modify some parameters to Improve the

class is to check ringbuffer cursor every 1ns when no new data is written to Ringbuffer. 1ns! It's no different from the dead loop, so the CPU is high. Change to a 100ms check, and the CPU immediately drops to 7.8%.Why disruptor Use this kind of sleepingwaitstrategy with such a risk in the official website example? The reason is that this policy does not use locks at all, and when the throughput is high, there is always data in the Ringbuffer, and the polling strategy maximizes its

function or method in the application to improve the program performance. (4) hardware and Operating System In order to improve the performance of Java applications, the CPU and more memory are adopted, and this is the only way to improve program performance, but this is no

collection process are explained.The five articles will explain the principles of Java Program Performance tuning, especially the necessary knowledge in this process and the need to determine whether your program needs tuning. It also describes the problems you may encounter during tuning. At the end of this article, I'll give you some advice on how to make better decisions when tuning

-processing of Heap Dump filesThe Heap Dump file can be obtained through the JVISUALVM user interface, which is also available through Jcmd and Jmap. The heap Dump file is a snapshot of the heap, typically using JVISUALVM and jhat to parse the snapshot.Back to top of pagePerformance analysis ToolsThe performance analyzers provided by Java are the most important analysis tools. It has a wide variety of stren

the correct data structure and algorithm, and consider the performance impact of changing your program. The impact of correct selection of data structures and algorithms is significantly different from all the suggestions provided in this document, predicting the performance impact of your changes will help you switch to a better implementation solution (this is more important to the class library code tha

. as the platform for establishing the online banking system of the bank. This is because Web sphere is based on the overall architecture that separates HTTP server from application server and supports lightweight thread specifications such as JSP, Servlet, and enterprise group Java Bean, all requests correspond to the processing threads on the Application Server

to read and write data. The channel represents the source or destination of the buffered data, which is used to read or write data to the buffer, and is the interface for accessing the buffer.This paper mainly introduces the buffer and channel in NIO to improve the performance of the system.1. NiO's buffer class and channelIn the implementation of NIO, buffer is an abstract class. The JDK creates a buffer for each

following problem: If a test plan must be created, and JMeter does not provide the required sampler or listener. For example, a user needs to test an Enterprise JavaBeans application. The user can still use JMeter's Java Request, which is essentially a Java class that can add whatever logic is needed to it. We create a sample

4. Memory Utilization:The related properties of memory utilization include page scheduling or page swapping, locking, concession in thread migration, and preemptive context switching.Memory paging occurs when the memory required for the application to run exceeds the available physical memory, and the application presents noticeable performance issues when the sy

the highest comfort speed. Obviously, this interest is very high for web applications and is constantly increasing. It is easy to improve efficiency, but it is difficult to see the actual results. To help you on your journey of exploration, this article will provide you with 10 suggestions that can increase the website performance by up to 10 times. This is the first article in a series of articles about how to improve

assessment yourself. The performance improvements discussed here are for DayTrader applications only, and are specific to the workloads described here and the supported hardware and software stacks. The application performance improvements that you implement with the tuning changes described in this article are certainly different and should be evaluated throug

I will share 11 practical tips on Java performance tuning and java Tuning Most developers think that performance optimization is a complicated problem and requires a lot of experience and knowledge. Yes, it is not wrong. It is not easy to optimize the application to achieve

expert's personal experience. Once heard a story, a factory printer is always inexplicably in a time of failure, then invited an expert, moved a chair near the printer, a few weeks later, called the workers to the floor of a corner repaired, and then the problem never appeared. But with the previously collected data, observing Cpu,io, application delay, network performance and other indicators of the curv

Websphere? Application Server Performance Tuning Toolkit is an Eclipse-based smart tool designed to help users tune WebSphere application by using data collection, data analysis, and statistical inference techniques The performance of the Server. The goal is to help users find bottlenecks and tune applications appropri

for a variety of reasons, such as: 1. Time is too long, I also forgot how to write, to see the code 2. Because the data is not built, the logic can not be reached, can not reproduce 3. Project is not my team development, architecture and code, shy disgusting. Figure 1:php Execution model of application system The running phase of PHP can be roughly divided into three phases: 1. Parse 2. Compile 3. Execute The compile process will produce

. net, Java, IIS, and J2EE, you will find that some functions or APIs are provided on this platform, but the other is not; so more often we need a transitional solution, when the new version comes out, we may discard the transition scheme for direct configuration or easier implementation of some features. [...] 2 Requirements The first step in performance optimization is to check whether the requirements ar

Performance | Optimization Java in the mid-90, after the emergence of praise, but also attracted some criticism. The winning admiration is mainly Java's cross-platform operability, the so-called "Write Once,run Anywhere". But because Java performance and operational efficiency compared with C, there is still a large ga

One: CPU1. The user-state CPU is the percentage of the total CPU time that executes the application code. The system-State CPU is the percentage of the total CPU time that the application performs operating system calls. System-State CPU high means that shared resources are competing or there is a lot of interaction between I/O devices. One goal of improving application