java remote profiling

not improve efficiency, but will reduce efficiency, because there is a lock upgrade process, this time will need to-xx:-usebiasedlocking to disable the biased lock. Here are the comparison of these types of locks: Lock Advantages Disadvantages Applicable scenarios Biased lock Locking and unlocking does not require additional consumption, and the execution of a non-synchronous method is less than the nanosecond-level gap. If there

("Fromrealsubject");}}publicclass proxysubjectextendssubject{privaterealsubjectrealsubject; The //proxy role internally references the real role @Override public voidrequest () {prerequest (); // Actions that are attached before a real-world role Operation if (Null==realsubject) { realsubject=newrealsUbject ();} Realsubject.request (); //true character completion postrequest (); //actions attached after a real-world role Operation } privatevoidprerequest () {system.out.println (" Prerequest

Commercial:ANTS Memory Profiler:http://www.red-gate.com/products/dotnet-development/ants-memory-profiler/ANTS Performance Profiler:http://www.red-gate.com/products/dotnet-development/ants-performance-profiler/NET Memory profiler:http://memprofiler.com/JetBrains dottrace:http://www.jetbrains.com/profiler/download/index.htmlSciTech Memory profiler:http://www.scitech.se/Free:CLR profiler:http://msdn.microsoft.com/en-us/magazine/ee309515.aspxSOS Debugging Extension:http://msdn.microsoft.com/en-us/li

Original article: Http://www.infoq.com/cn/news/2011/08/jprofiler7 J-Technologies Co., Ltd. released jprofiler 7.0 some time ago. Jprofiler is a Java SE/EE profiling tool that features CPU analysis, memory analysis, thread analysis, and Vm telemetry. New Features of version 7.0 include: Analyze the built-in probes for JDBC, JMS, JNDI, Servlet, files, sockets, and processes. You can use the API to customi

Summary The single case pattern is one of the simplest design patterns, but for Java developers, it has many drawbacks. In this month's column, David Geary explores the single case pattern and how to deal with these flaws in the face of Multithreading (multithreading), Class loaders (Classloaders), and serialization (serialization). A singleton pattern is suitable for situations where a class has only one instance, such as a window manager, a print

programmers can read and set the values of the components. (2) provides the ability to create and run objects on a remote platform across networks to achieve Network Mobility in java. This is called Remote Call (RMI), which allows a Java program to put objects on multiple machines step by step. This step-by-step capab

without first checking. A typical example of the Set method is the Unlock () method in the lock class. A thread holding a lock is always able to unlock successfully without checking that the lock is in an unlocked state.The program flow of the set method is usually as follows: Set internal state Notifies the waiting thread Here is an example of the Unlock () method: Public class lock{ Privatebooleanfalse; Public synchronized void unlock () { false; Notify (

the listThere are at least three ways to traverse after JDK1.5: ForEach, iterator, for loop.Package Bupt.xiaoye.charpter2.list;import Java.util.arraylist;import Java.util.iterator;import java.util.List; public class Testfor {public static void Testforeach (List list) {Object Temp;for (object t:list) temp = t;} public static void Testfor (List list) {Object temp;for (int i = 0; i The result of the operation is:As you can see, the direct for loop is the most efficient, followed by iterators and f

Gen, which can be shorter on pause times. Use-XX:+USEPARALLELOLDGC to enable parallel compacting Collector in the JVM startup parameters. Concurrent mark-sweep (CMS) Collector: The concurrency flag clears the garbage collector, for young Gen uses the same garbage collection strategy as parallel Collector, for tenured Gen, Garbage-collected garbage-flagged threads are at the same time as the application thread, while garbage removal requires suspending the application thread, but the pause

The remote Virtual Console relies on the Java Runtime Environment (JRE), before opening the link through the browser, the system must install the JRE environment, the remote management console is actually a Java program, open the appropriate Web site will download a JNLP (Java