7 Ways to Capture Java Heap Dumps

DZone

java performance heap dump heap dump analysis java monitoringHeap Dumps are vital artifacts to diagnose memory-related problems such as slow memory leaks, Garbage Collection problems, and java.lang.OutOfMemoryError.They are also vital artifacts to optimize the memory consumption. There are great tools like Eclipse MAT and Heap Hero to analyze heap dumps. However, you need to provide these tools with heap dumps captured in the correct format.

Java 190

Heap Memory In Java Applications Performance Testing

DZone

Does every performance engineer need to know about how memory in Java works? To completely fine-tune the java performance bottlenecks for high performance my answer is YES. Java memory management is a significant challenge for every performance engineer and Java developer, and a skill that needs to be acquired to have Java applications properly tuned.

Java 181
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What Is the Best Java Debugger?

DZone

I feel that in the modern world of development, there are too many factors to pick a single tool for debugging any language, let alone Java. java performance ide debugging debug debuggers debugging tools debugging javascript ide for javascript development

Java 214

Java Application Troubleshooting the Sherlock Holmes Way

DZone

Troubleshoot your Java application, the Sherlock Holmes way. Java application failure troubleshooting can be closely associated with the typical crime scene investigation. I read few Sherlock Holmes classic stories in recent times at home, while struggling to solve the Java application failure mysteries at the office. Java application failures can be painful at times when our application doesn't leave enough traces to help us to solve the mystery.

Java 176

Java vs. Go Microservices - Load testing (Rematch)

DZone

We started reading official documentation, tutorials, blog posts and articles about Go, especially ones where authors shared their experiences of migration from Java to Go or comparison Java with Go, as at that moment, we'd been using Java for 15+ years. java microservices golang load testWhen Go first appeared in November 2009, we didn't hear much about it, and our first interaction happened in 2012 when Go version 1 was officially released by Google.

Java 180

How to Tune Garbage Collection in Java

DZone

These pauses are sometimes called Stop-The-World pauses, and the minimization of them is the primary concern of GC tuning, as they can have a huge impact on the performance of a Java application. java tutorial performance garbage collection java performance tuning gc garbage collector heapGarbage collection is the mechanism by which the JVM reclaims memory on behalf of the application when it's no longer needed.

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Java vs. Python Comparison: The Battle of Best Programming Language in 2021

DZone

Let's start with Zoom, an incredible video-conferencing application on which almost today's world relies on was developed using JAVA and C++. java python performance programming language python development python developer java developersComparing two programming languages is similar to a comparison between two cars, where two different individuals may have different opinions on both of them.

Java 178

Principles to Handle Thousands of Connections in Java Using Netty

DZone

java server performance parallelism socket ioC10K problem is a term that stands for ten thousand concurrently handling connections. To achieve this, we often need to make changes in the settings of created network sockets and default settings of Linux kernel, monitor the usage of the TCP Send/Receive Buffers and Queues and, in particular, adjust our application to be a good candidate for solving this problem.

Java 213

Unlock end-to-end observability insights with Dynatrace PurePath 4 seamless integration of OpenTracing for Java

Dynatrace

Therefore, we’re happy to announce support for OpenTracing data that’s emitted by auto- and custom-instrumentation of Java source code with Dynatrace PurePath 4, our distributed tracing and code-level analysis technology. Find OpenTracing for Java seamlessly integrated into PurePath 4.

Java 167

Java 9 Performance Improvements — Getting Started With Java Spring

DZone

In my previous article, I wrote about the Modularity System , which was introduced in Java 9. With this writing, I would like to continue the Java evolution line by taking a glance about the main Java 9 features according to the performance improvements. Java 9 Feature: Performance Improvements. In Java 9, the most significant performance upgrade was concerned with the Garbage Collection. java performance java 9 garbage collector new features

Java 100

Performance Tuning Java Applications in Linux

DZone

Learn how to make your Java applications performance perfectly. In this blog post, we shall go over various aspects that have to be taken care of to extract maximum performance out of a Java Application running on Linux. Ensure there is enough RAM to hold your java process. Swapping java process to disk is a performance killer. java performance performance tuning java performance tuning java application linux performance

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Java memory optimizations: 3x Jenkins performance improvement with Dynatrace

Dynatrace

But let’s start from the beginning: Step #1 – Switching to Java 11. In order to leverage the new Memory Profiling feature I’s necessary that you upgrade to Java 11 as this version introduces new capabilities ( JEP 331 ) that allow tool vendors like Dynatrace to capture memory allocation information at run-time with zero overhead. Looked like a classical Thread Leaking issue: Dynatrace observed a thread leak after switching to Java 11 causing the JVM peak at 8k threads.

Java 160

How to Boost Redis With Local Caching in Java

DZone

You may also like: Java-Distributed Caching in Redis. Redis developers who want to do local caching in Java will find that Redis doesn’t support this functionality out of the box. In this article, we’ll discuss how you can take advantage of local caching in Java and Redis with a third-party Redis Java client such as Redisson. java tutorial performance redis cache spring cacheBoost Redis.

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Top 5 JUnit and Unit Testing Courses for Java Programmers

DZone

You may already know that JUnit and Mockito are two of the most popular testing libraries for Java applications, and you will find them in almost every Java application classpath. I often meet and work with Java developers who know Java well but haven't written a single unit test. java performance testing tdd unit testing junit online courses mockito unit tests java for beginners

Java 159

Java Performance: For-Looping vs. Streaming

DZone

How well does your Java perform? The traditional way of iterating in Java has been a for-loop starting at zero and then counting up to some pre-defined number: private static final int ITERATIONS = 10_000; @Benchmark public int forUp() { int sum = 0; for (int i = 0; i < ITERATIONS; i++) { sum += i; } return sum; }. performance jvm streaming java performance iteration data stream for loop graal vm cleverIteration Performance.

Java 118

Measuring Performance of Your Methods Using JMH in Java

DZone

Measure Java performance! From JDK-12 onwards, the JDK comes with JMH (Java Microbenchmark Harness), It is a toolkit that helps you implement Java microbenchmarks correctly. JMH is developed by the same people who implement the Java virtual machine (JVM) so they know the internals and how Java makes optimizations at run time. jvm jdk java 1.8

Java 116

Rocket Performance on Your Java Application with Memcached

DZone

To install RavenDB using Docker follows the step below: java nosql performance memcached jakarta ee jakarta jnosqlMemcached is an easy-to-use, high-performance, in-memory data store. It offers a mature, scalable, open-source solution for delivering sub-millisecond response times, unlike databases that store data on disk or SSDs, Memcached keeps its data in memory. This tutorial will cover how to use Memcached in Jakarta EE with Eclipse JNoSQL. Installing Memcached Using Docker.

Java 168

Multi-Threaded Geo Web Crawler In Java

DZone

The implementation is in core Java. Mowglee is a multi-threaded geo web crawler in Java. To do this, you should have intermediate to expert level core Java skills, an understand of the intricacies of multi-threading in Java, and an understand of the real-world usage of and need for web crawlers. This article provides the implementation of a web crawling system called Mowglee that uses geography as the main classifying criteria for crawling.

Java 158

Complete Guide To Access Forms In Selenium With Java

DZone

java performance automation testing selenium automation selenium 3.0 Have you noticed the ubiquity of web forms while surfing the internet? Almost every website or web-application you visit leverages web-forms to gain relevant information about yourself. From creating an account over a web-application to filling a brief survey, web forms are everywhere! A form comprises web elements such as checkbox, radio button, password, drop down to collect user data.

Java 131

Java Performance Tools: Nine Types of Tools You Need to Know!

DZone

Something to test Java's performance. java performance apm tracing rum java profiler jvm performance web requestsManaging an application’s performance, and specifically keeping it in good condition, is one of the hardest challenges in software development. That’s true for virtually any programming language and platform.

Java 139

How to Automate Appium Java Tests In Parallel Using TestNG

DZone

Automate Appium Java Tests In Parallel. The beauty of Appium for mobile testing is that its tests can be written in any programming language including Python, Ruby, Java, JavaScript, and C#. While we have covered extensive Appium tutorials, in this article, we'll walk through how to automate Appium tests in parallel against our real devices using TestNG Java sample tests. java tutorial performance testng appium java testing appium testing

Java 100

Java Unit Testing Best Practices: How to Get the Most Out of Your Test Automation

DZone

Generally, a unit should be a small part of the application — in Java, it is often a single class. java performance testing unit testing best practices testing pyramid testing best practicesUnit testing is a well-known practice, but there's lots of room for improvement! In this post, the most effective unit testing best practices, including approaches for maximizing your automation tools along the way.

Remote Debugging Java Applications With JDWP

DZone

Most Java developers have had to debug their applications, usually to find and fix an issue there. This is where JDWP (Java Debug Wire Protocol) comes into play. In order to debug remotely executed JVMs (where the debuggee is separately launched locally or on another machine), the Java platform defines a protocol for communication between the JVM and the debugger. java performance jvm debugging remote debugging jdwp

Java 100

Performance Analysis of ArrayList and LinkedList in Java

DZone

ArrayList and LinkedList are frequently used classes in the Java collection framework. java performance array linkedlist arraylist interview answers performance analysisIf you know only understand basic performance comparisons of ArrayList and LinkedList , but not the minor details of these two classes, then this article is for you. " ArrayList should be used where more search operations are required, and.

Java 125

Addressing Application Performances in Java Applications

DZone

java tips and tricks performance best practicesWhile solving issues related to NFRs (especially application performance), I always think about why we as developers give less importance (honorable exceptions are always there) to performance. Is this due to a lack of awareness? Many times, we start thinking of performance only at the time of a performance test or after deployment.

Java 100

Transform mainframe applications into z/OS Java services with end-to-end transaction visibility and anomaly detection (Preview)

Dynatrace

Although these COBOL applications operate with consistent performance, companies and governments are forced to transform them to new platforms and rewrite them in modern programming languages (like Java) for several reasons. IBM Java version 7. Dynatrace news.

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Top 9 Free Java Process Monitoring Tools and How to Choose One

DZone

What Are Java Profilers? A Java Profiler is a tool that monitors Java bytecode constructs and operations at the JVM level. java open source performance monitoring jvm process java performance process monitoringTo help equip you for the ongoing process of optimization and the life of debugging ahead of you, we’ve gathered a list of the best tools to monitor the JVM in both development and production environments. And the best part?

Java Or Scala Performance – Which One Is Better?

Alex Podelko

For years, the debate has raged on regarding which programming language is better, Java or Scala. While some argue that just because Java is older it is better, others believe Scala is better for a variety of reasons. In essence, Java is classified as an object oriented programming language. It is designed to run in specific environments, like Java Virtual Machine for instance. If you feel more comfortable using simple code, then using Java is your best bet.

Java 100

Comparing Apache Ignite In-Memory Cache Performance With Hazelcast In-Memory Cache and Java Native Hashmap

DZone

java big data performance apache ignite in-memory data grid in-memory caching distributed cacheOverview. This article compares different options for the in-memory maps and their performances in order for an application to move away from traditional RDBMS tables for frequently accessed data. In this case, for the sake of demonstration, I have taken 2 million dummy physician records that reside in the database table and migrated them to in-memory maps.

Cache 109

Increase Throughput by Eliminating Blocking Code in Your Java REST App

DZone

java performance jvm blocking profiler tool blocking codeBlocking code is code which blocks executing threads until their operations finish. It's not always bad to block a thread and wait until the result is ready but there are situations where it's not optimal from a throughput and memory point of view. This article assumes some basic knowledge about the differences between blocking and non-blocking code.

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'High-Performance Java Persistence' Chapter 8: Why JPA and Hibernate Matter

DZone

This chapter aims to remind the reader why Hibernate has its place in high-performance data access, and the table of content looks like this: java performance hibernate jpa java persistenceSecond Part, Chapter 8. Now that the first part of my book is published, it’s time to focus on the second part, which covers both JPA and Hibernate.

Java 100

Java vulnerabilities

Sutter's Mill

With the help of friends Robert Seacord and David Svoboda of CERT in particular, I posted a note and link to their CERT post today because people have been misunderstanding the recent Java vulnerabilities, thinking they’re somehow really C or C++ vulnerabilities because Java is implemented in C and C++. From the post: Are the Java vulnerabilities actually C and C++ vulnerabilities? You’ve probably seen the headlines: [US-CERT] Java in Web Browser: Disable Now!

Java 40

Java vs. Python for test automation? Why Ruby is the better choice

TechBeacon Testing

App Dev & Testing, Testing, Test Automation, Ruby, Java, PythonWhat's the top language for writing software test automation scripts? Your guess is as good as anyone else's, because there's no agreement on this. And that's unfortunate. You would think by now we testers would have settled the debate.

Java 72

Tricks with Direct Memory Access in Java

Highly Scalable

Java was initially designed as a safe, managed environment. Nevertheless, Java HotSpot VM contains a “backdoor” that provides a number of low-level operations to manipulate memory and threads directly. It is hard to imagine a Java developer who uses this backdoor in any regular development because this API is extremely dangerous, non portable, and volatile. There are at least two standard ways to do it in Java: put payload to thread local or use static field.

Java 101

Static Analysis of Java Enterprise Applications: Frameworks and Caches, the Elephants in the Room

The Morning Paper

Static analysis of Java enterprise applications: frameworks and caches, the elephants in the room , Antoniadis et al., If you try running Soot , WALA , or Doop out of the box on a real-world Java enterprise application you’re likely to get very low coverage, or possibly even no results at all if the tool fails to complete the analysis. Popular static analysis frameworks for Java provide no support for the lifecycle or injected semantics of enterprise applications.

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Java Package Flame Graph

Brendan Gregg

But with Java, there's another way to visualize the same CPU workload which provides some additional insight: **a Java package flame graph**. Instead of visualizing the stack trace hierarchy, this visualizes the Java package name hierarchy. Here is a normal stack trace-based [CPU flame graph] for Java, running a microbenchmark ( SVG ): The y-axis is stack depth. How much CPU time was in java/util methods directly, excluding child functions calls?

Java 40

Troubleshooting CPU Spike in a Major Trading Application

DZone

java tutorial performance troubleshooting cpu java development tool java threads java memory leak java design pattern thread classIn this article, we are going to discuss how we troubleshoot a CPU spike problem that surfaced in a major trading application in North America. All of a sudden, this application’s CPU started to spike up to 100%.

Deploy Friday E33 From Dev to Deploy With Helidon,

DZone

With that, the question arises: How will Java deal with solutions like NodeJS? In this talk, we'll explore this framework and make Java alive in the cloud era. java cloud performance cloud native jakarta ee microprofile platform.sh

Dynamic Programming Problems: Learn to Solve Them More Efficiently

DZone

Programming problems can be listed and are sorted based on various categories of programming languages used like PHP, Java, Python, C++, and many others, which developers use for coding. tutorial programming java & net which is the best programming conceptsProgramming is all about solving issues and problems. There is an end number of programming issues that the developers face when they are writing code for developing a website, applications, or any other type of software.

Article: Donkey: A Highly-Performant HTTP Stack for Clojure

InfoQ Articles

JVM HTTP Clojure Networking Performance & Scalability Java Functional Programming Development Architecture & Design article

How to Kill Processes in Unix/Linux

DZone

java open source devops command line operating systems linux operating system linux tools/utilities system admin unix operating system unix osThere are different options to terminate a process in Unix/Linux flavor of operating systems. This article intends to list and provide examples of each option. You can use the kill command to terminate a process by passing the process id. PID is the process ID of the process that you want to terminate.

Log4j Bug — Slows Down Your Application

DZone

java java 8 spring framework glassfish technology and tools troubleshoot azure cloud saas application development thread dump thread memoryLearn how to troubleshoot your application. Recently we were troubleshooting a popular SaaS application. This application was slowing down intermittently. To recover from the problem, the application had to be restarted. This application was slowing down sometimes during high traffic volume periods; sometimes during low traffic periods as well.

TCP: Out of Memory — Consider Tuning TCP_Mem

DZone

You may also like: Java Out of Memory Heap Analysis. The application was running on a GNU/Linux OS, Java 8, Tomcat 8 application server. performance api memory cpu java (programming lang. java (software What happens when you're out of memory? Recently we experienced an interesting production problem. This application was running on multiple AWS EC2 instances behind Elastic Load Balancer.

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