btrace java

Http://www.myexception.cn/program/729263.html Btrace usage SummaryI. backgroundVarious problems may occur frequently in the production environment. To locate the problem, you need to obtain the data information when the program is running, such as method parameters, return values, global variables, and stack information. To obtain the data information, we can rewrite the code, print the log information, and then release it to the production environm

Btrace is a secure tool that can dynamically track Java programs. His actions do not affect existing Java processes, do not close running Java processes, and do not modify the logic and data in the Java process. Therefore, also become our online tracking Production code powe

Fault analysis artifact-BTrace, fault analysis God btrace In the past, when I was working on a project, I often encountered problems such as online data source leaks. In addition, various inexplicable problems often occur online. If you want to view method parameters, but some method parameters do not have logs, you can only solve the problem through patch upgrade. If you encounter an emergency bug and can

Btrace tool usage "Hello World" Case Description Use the test method to receive an int type parameter, and add two strings in map according to the parameter. If no logs are printed in the modern code, the generated int value cannot be determined and the execution path cannot be determined. In this case, BTrace can be used to track and analyze the program path.

Development Tool series (1): Btrace-Online Debug toolBtrace Btrace is used to debug a running system and does not pause the system during debugging. It is particularly suitable for tracking online problems. You can monitor the call of any method in a system in real time. you can know the parameters and returned values of these methods, and how long the method call takes.

Btrace is a Java-based tool that can dynamically track bytecode. It can monitor the execution status of Java programs at runtime without modifying the current program, for example, you can monitor the memory status and call methods. However, it can only run on JDK 6 + and later versions. for some reasons, for example, in JDK 5, jtwti (

Btrace Introduction:Btrace is a secure, dynamic tracking tool that is used on top of the Java platform. It is typically used to dynamically track a running Java program. Instructions for use here. Over here. Note The version issue when downloading, I originally downloaded the version of release-1.2.3, then the Java v

Document directory Attach to JVM, load agent Instrumentation Attach and instument Btrace content Procedure: 1. btrace parses the script and generates the corresponding agent package 2. Attach to JVM, load the agent package, and execute the premain or agentmain method. The input parameters include 3. ASM enhanced code 4. Replace InstrumentAttach to JVM, load agent Obtain JVM through JVM Ti API JVM Ti

How can we locate these page requests when the system execution is inefficient when accessing page requests? Java has a very effective dynamic tracking tool-btrace URL: https://kenai.com/projects/btrace/downloads For example, you want to locate our controller code which methods are slow: 1. We can write the following classes: Package demo; Import Com.sun.btra

Previously mentioned using the command line to perform btrace monitoring, the JDK actually provides a better way to monitor the application.We can use the Jvisualvm.exe plus plug-in way to monitor, so more convenient.1. Install the Btrace plugin in Jvisualvm.exeSelect the Btrace plugin here, as I have installed, this cannot be selected.2. Using pluginsClick on th

In the past, when doing projects, encountered on-line data source leakage and other issues are often helpless. And on the line often appear a variety of strange and strange problems, want to see the method parameters, but some method parameters do not have a log, so only through patch upgrade to solve the problem. If you encounter an emergency bug and you can't stop the service for upgrades, you're often stuck in a super-embarrassing state. A recent study of the JVM, stumbled upon a fault analys

One, the method of calculating the object sizeHow to calculate the size of an object in Java, 4 ways are found:Getobjectsize method of 1.java.lang.instrument.instrumentation;2.BTraceUtils sizeof method;The code calculation provided in 3.http://yueyemaitian.iteye.com/blog/2033046;The toolkit provided by 4.https://github.com/mingbozhang/memory-measurer;The use of java.lang.instrument.Instrumentation is essentially the basis of the other three methods, b

Java tutorial translation Sequence Java Introduction Build a JSE development environment-install JDK and eclipse Language basics Java Hello World Program Analysis Variable Java Variables Java Native type Conversion of Java