java performance definitive guide

medium-sized website services, and occupy the siege team of more than 60% of the crowd. In the focus on large-scale portal sites, small and medium-sized web portal technology development and practical experience is worth sharing.Whether a large portal site or a small or medium-sized vertical type site will pursue stability, performance and scalability. The technical experience of large-scale web site sharing is worth learning and borrowing, but the i

Guide Understanding the application's input/output (I/O) model means the difference between the planned processing load and the brutal actual usage scenario. If the application is small and does not serve a high load, it may have little impact. But as the application load goes up, using the wrong I/O model may cause you to stomp around and be scarred. As with most scenarios where multiple solutions exist, the focus is not on which approa

Whether a large portal site or a small or medium-sized vertical type site will pursue stability, performance and scalability. The technical experience of large-scale web site sharing is worth learning and borrowing, but the implementation to more specific practice is not applicable to all sites, other language development sites I dare not say more, but the Java development system, I can still you to plug in

1 Introduction One of the main design principles of the Java SE 6 (Java Platform Standard Edition 6) is to target performance flaws, with some of the most popular Java benchmark tests and close collaboration with the Java community to determine the most critical areas of

, more siege engineers are unknown to some of the fledgling small and medium-sized Web services, but also occupy the siege of the ranks of more than 60% of the crowd. In the attention of large portal sites, small and medium-sized portal technology development and combat experience is worth sharing. Both large portal sites and small and medium-sized vertical types of Web sites will be able to pursue stability, performance, and scalability. The technica

is divided evenly into three parts, the eldest brother occupies two, and the younger generation occupies a copy. Reference Sun Java System application Server Enterprise Edition 8.2 Performance Tuning guide), this ratio is not suitable for all situations, especially when local variables in your application are far greater than the global variables, and a large nu

, the young generation is older than the old generation) 2 (that is, the JVM heap memory is evenly divided into three portions, the annual boss occupies two portions, while the young generation occupies one portion. See Sun Java System Application Server Enterprise Edition 8.2 Performance Tuning Guide. This ratio is not suitable for all situations, especially whe

generation. This value has a great impact on the system performance. Sun officially recommends 3/8 of the total heap configuration. From, you can seeTotal heap size = Young Generation size + Old Generation size, XMS and xmx do not include perm size. -Xss128k: Set the stack size for each thread. After JDK 256, the size of each thread stack is 1 MB, and the size of each previous thread stack is K. The memory size required for more application

help message. Note: thejcmd utility can be used to dynamically interact with Java Flight Recorder (JFR) in a JVM that is already running. You can use it for unlock commercial features, Enable/start/stop flight recordings, and obtain various status messages from The system. For a list of examples, see the Java Flight Recorder Runtime guide a

I. Introduction: A recent project requires performance testing, which consists of several applications offering services, the framework of which is Alibaba's open source service Framework Dubbo. About the introduction of Dubbo, the Internet also has a lot of information, I just did a rough understanding, there is no in-depth study, the relevant information address is as follows: http://www.iteye.com/magazines/103,http://alibaba.github.io/ dubbo-doc-s

In any system, the log is a very important part, it is a reflection of the system operation of the important basis, but also the necessary clues to troubleshoot problems. Most people recognize the importance of the log, but how many people think carefully about how to log, the impact of the log on the performance of how much? Let's talk about the performance of Java