java application performance

complete? */if ( aio_error (req) = = 0) {/* Request completed successfully, get the return status */ret = Aio_return (req); } return; In Listing 6, after creating your own aiocb request, we use the SIGEV_THREAD request for a thread callback function as the notification method. Then we will specify a specific notification handler and load the context that will be transferred into the handler (in this case, a reference to the aiocb request itself). In this handler, we simply refer to the arri

twisted cable depends on the quality, length and transmission of the wire used. A reliable transfer rate of millions of bits per second can be achieved within a limited distance, as long as it is carefully selected and installed. When the distance is short and the appropriate transmission equipment and transmission protocols are used, the transmission rate can reach 100mbit/s~155mbit/s, even gigabit. The outer layer of the shielded twisted pair cable is wrapped by aluminum to reduce the radiati

The Java platform's garbage collection mechanism significantly improves the efficiency of developers, but a poorly implemented garbage collector can consume an application's resources too much. In the third part of the Java Virtual Machine Performance Optimization series, Eva Andreasson introduces the Java platform's m

JNI Full name Java Native Interface.It provides a way to interact with managed code (written in the Java programming language) and native code (written in C + +). It is vendor-Independent (Vendor-neutral), which supports loading code from a dynamic shared library, although this can be a bit cumbersome, but sometimes it is quite effective.If you are not familiar with JNI, you can read through the

This article mainly describes how to optimize the performance of DB2 application systems. We all know that DB2 database is a high-performance large-scale relational DB2 management system, it is widely used in the customer/server architecture. The criteria for evaluating system performance optimization include: Throughp

Enterprise applications can be divided into the following types based on the system architecture: Client/Server-Client/Server Architecture l Browser/web server layer 3 architecture l middleware application server layer 3 architecture l web server and middleware layer 3 Architecture The above architecture consists of clients, Web servers, intermediate application servers, and database servers.

Introduction: Lotus Notes/domino developers who do not want to hear the following comment: "This application is great, but too slow!" In this two-part article series, we'll explain how to build a Notes/domino application that optimizes performance to avoid embarrassing situations like this. One of the biggest drawbacks we know about a great app is that it's too

Java reflection application and Java reflection Application Package com. zheges; import java. util. date; public class Customer {// JavaBean object private String name; private int password; public String present = "God"; private Date date; @ Overridepublic String toString

performance. The way in which session state information is stored is selected through the Web.config file: mode="InProc/StateServer/SqlServer" //存储方式由此行选择 stateConnectionString="tcpip=127.0.0.1:42424" …… timeout="20"/> 2, server control optimization selection 2.1 Reducing unnecessary server controls The convenience and functionality that the server control brings is unmatched by the HTML control. However, each server control needs to create the

Summary: This article proposes a lightweight. NETApplication Performance Testing Framework Design Scheme. This scheme further expands the existing results, and is more practical and scalable. 1Introduction Text[1]Proposed. NETThe basic idea of the application "Performance Testing Framework" is to run the program blocks to be tested through multiple

http://www.ibm.com/developerworks/cn/aix/library/es-Javaperf/es-Javaperf4.html maximizing Java performance on AIX, Part 4: monitoring trafficThis five-part series provides several techniques and techniques that are often used to optimize Java™ applications for optimal performance on AIX®. This article discusses the sce

with blocking notifications. In this model, non-blocking I/O is configured, and then blockselectA system call is used to determine when an I/O descriptor is operated. EnableselectThe call is very interesting because it can be used to provide notifications for multiple descriptors, not just for one descriptor. For each prompt, we can request that this descriptor can write data, read data is available, and whether an error occurs. Figure 4. Typical process of asynchronous blocking I/O model (sele

-blocking I/O with blocking notifications. In this model, non-blocking I/O is configured, and then blockselectA system call is used to determine when an I/O descriptor is operated. EnableselectThe call is very interesting because it can be used to provide notifications for multiple descriptors, not just for one descriptor. For each prompt, we can request that this descriptor can write data, read data is available, and whether an error occurs. Figure 4. Typical process of asynchronous blocking I/

operations.When the function of competing products is similar, the user experience will be promoted to the core value of the product, which is the last bastion of competition among enterprises. Enhancing the user experience will also be the main way for enterprises to improve their brand loyalty and promote product innovation.RICHAPM the introduction of the company by many companies are hot, to combat-based products as the cornerstone of the provision of professional

exception is thrown if the thread priority of the app setting exceeds the range of values (1-10)(2) Another way is to use the process.setthreadpriority () in the Android.os bagIt is based on the priority of Linux, from 20 (highest) to 19 (lowest)8 priority levels are defined:Thread_priority_audio (-16)Thread_priority_background (10)Thread_priority_default (0)Thread_priority_display (-4)Thread_priority_foreground (-2)Thread_priority_lowest (19)Thread_priority_urgent_audio (-19)Thread_priority_ur