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"The Performance Engineer's Guide To Java HotSpot" by Monica Beckwith
 
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Monica Beckwith has worked with the Java Virtual Machine for more than a decade not just optimizing the JVM heuristics, but also improving the Just-in-time (JIT) code quality for various processor architectures as well as working with the garbage collectors and improving garbage collection for server systems. During this talk, Monica will cover a few JIT and Runtime optimizations and she will dive into the HotSpot garbage collection and provide an overview of the various garbage collectors available in HotSpot. Monica Beckwith CODE KARAM LLC Monica Beckwith is an independent performance consultant and instructor optimizing customer applications and systems running the Java Virtual Machine. She has worked with Java HotSpot VM optimizing the JIT Compiler, the generated code, the JVM heuristics and garbage collection and collectors. Monica is a regular speaker at various conferences and has several published articles on topics including garbage collection, the Java memory model and others. Monica led Oracle's Garbage First Garbage Collector performance team, and was named a JavaOne Rock Star. Monica also co-authored the 'Java Performance Companion' book. Monica was recently considered one of the influential women in Java and Scala: http://blog.takipi.com/10-influential-women-in-java-scala-and-everything-in-between/
Views: 1809 Strange Loop
HOW TO FIX JAVA HOTSPOT(TM) 64 BIT SERVER TM...
 
03:11
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Views: 12040 Christ Kevorkian
Java Performance: Tune the HotSpot JVM Step-by-Step
 
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http://www.informit.com/store/java-performance-livelessons-video-training-downloadable-9780133443554 This video is a sample excerpt from Java Performance LiveLessons. 4+ Hours of Video Instruction Based on the best-selling book,Java Performance, Java Performance LiveLessons covers the latest Oracle and third-party tools for monitoring and measuring performance on a wide variety of hardware architectures and operating systems. Renowned expert, Charlie Hunt, provides viewers with an overview of a modern Java Virtual Machine, the critical performance statistics to monitor within an operating system, JVM, and Java application, an overview of how the HotSpot garbage collectors work, an explanation of the garbage collection output produced by the garbage collectors, and a step-by-step approach to tuning a Java application. Charlie Hunt is the Performance Engineering Architect at Salesforce.com. He was previously at Oracle, where he was responsible for improving the performance of the HotSpot JVM and Java SE class libraries. He has also been involved in improving the performance of the Oracle GlassFish and Oracle WebLogic servers. A regular JavaOne speaker on Java performance, he is coauthor of Java Performance (Addison-Wesley, 2011) and NetBeans™ IDE Field Guide (Prentice Hall, 2005). Skill Level: Intermediate to Advanced Java programmer/developer Who Should Take This Course?: Beginner to Advanced Java and JVM performance tuning engineer, and Advanced Java user / developer What You Will Learn: The differences between a JRE and the JDK, how to install both, and the major components of the HotSpot Java Virtual Machine What performance statistics to monitor and collect and at each level of the software stack: OS, JVM, and Java application How to tune the JVM's garbage collector How to tune, step-by-step, the HotSpot JVM Course Requirements: Fluent with, or a good understanding of, the Java programming language Basic understanding of a Java Virtual Machine is helpful, but not required The LiveLessons Video Training series publishes hundreds of hands-on, expert-led video tutorials covering a wide selection of technology topics designed to teach you the skills you need to succeed. This professional and personal technology video series features world-leading author instructors published by your trusted technology brands: Addison-Wesley, Cisco Press, IBM Press, Pearson IT Certification, Prentice Hall, Sams, and Que. Topics include: IT Certification, Programming, Web Development, Mobile Development, Home and Office Technologies, Business and Management, and more. View all LiveLessons on InformIT at http://www.informit.com/livelessons
Views: 9331 LiveLessons
Open Heart Surgery: Analyzing and Debugging the Java HotSpot VM at the OS Level
 
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Debugging Java applications is comfortable and simple, but if you want to look beyond the Java horizon, you need special knowledge and and different tools. This interactive session shows you how to debug a running VM or analyze a VM core file with a native debugger. You will also learn how to use some of the more than 1,200 VM options to trace or modify the VM behavior. This knowledge can greatly help you identify, isolate, and reproduce the root cause of hard VM crashes, and it can also be pure fun to see which actual machine instruction the CPU is executing for your Java code. Author: Volker Simonis Volker Simonis works for SAP in the SAP JVM Technology group. He is an OpenJDK contributor from the very beginning and helped SAP and the SAP JVM team engage in the OpenJDK project. He's the project lead of the OpenJDK PowerPC/AIX porting project and a JDK8 and JDK9 reviewer. View more trainings by Volker Simonis at https://www.parleys.com/author/volker-simonis-3 Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials
Views: 2109 Oracle Developers
21 Most Important Java 8 VM Options for Servers (JVM parameters)
 
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In this video I explain some 21 JVM parameters which are suited for most server applications. If you have any questions, you can read those links below for more information or just ask in the comments section. You can find more infos reading following these links: - http://blog.sokolenko.me/2014/11/javavm-options-production.html - http://www.petefreitag.com/articles/gctuning/ - http://stas-blogspot.blogspot.de/2011/07/most-complete-list-of-xx-options-for.html You might also want to check out my blog at http://www.maknesium.com
Views: 5838 Maknesium.com
حل مؤقت  لمشكلة ماين كرافت Java VM: Java HotSpot(TM) 64-Bit Server VM
 
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Completely ignored arguments: --nativeLauncherVersion, 307 17:40:53 Client thread/INFO: Setting user: your username 17:40:53 Client thread/INFO: Session ID is censored 17:40:54 Client thread/INFO: LWJGL Version: 2.9.4 # # A fatal error has been detected by the Java Runtime Environment: # # EXCEPTION_ACCESS_VIOLATION 0xc0000005 at pc=0x00000000743e6897, pid=5816, tid=4832 # # JRE version: JavaTM SE Runtime Environment 8.0_25-b18 build 1.8.0_25-b18 # Java VM: Java HotSpotTM 64-Bit Server VM25.25-b02 mixed mode windows-amd64 compressed oops # Problematic frame: # C atio6axx.dll+0x196897 # # Failed to write core dump. Minidumps are not enabled by default on client versions of Windows # # An error report file with more information is saved as: # C:\Users\Black93Ak\AppData\Roaming\.minecraft\hs_err_pid5816.log # # If you would like to submit a bug report, please visit: # http://bugreport.sun.com/bugreport/crash.jsp # The crash happened outside the Java Virtual Machine in native code. # See problematic frame for where to report the bug. # Java HotSpotTM 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release أي بي سيرفر التيم سبيك : pro3rb.us أسم الغرفة : Black Ak مفتوحة أسئلة مكررة : أسمك ؟ محمد متزوج ؟ أنتظر بنت الحلال عمرك ؟ يقولون عمري 22 بس يمكن اكثر هههه الألعاب الي تنزلهم ؟ أنزل أي لعبة تعجبني وأكون مستمتع باللعب فيها ما يهمني أذا مطلوبة أو غير مطلوبة عليها مشاهدات أو ما عليها ..... أنا مستمتع يعني المشاهد يستمتع حتى لو حصلت على تفاعل بسيط سبب أختيارك لأسم القناة ؟ Black لوني المفضل + Ak هو أختصار لأسم مجموعة رشاشات هجومية وأنا احب أحد أنواعها وهو AK-47 أنت من وين ؟ : https://www.youtube.com/watch?v=96vwOnlz2Qk البرامج الي بتستخدمها ؟ https://www.youtube.com/watch?v=6RQD0J6coaY نوع كمبيوترك ؟ LENOVO G 40-70 كيف تنزيل المداليات ؟ https://www.youtube.com/watch?v=boCoceqkCy0 مين صمم ثيم قناتك ؟ https://www.youtube.com/watch?v=tPBR_QcQ9uU كيف تشحن جواهرك ؟ https://www.youtube.com/watch?v=JWKAyguhPnw كيف تحصل جواهرك ؟ أشتريت 16500 الماسة والباقي تجميع تربح كم من اليوتوب ؟ ارباح بأرقام بسيطة جداً ولحد الأن ما أخذتهم ولا تسأل ليش ما أخذتهم لأن ماعرف كيف اخذهم هع أسماء وكودات كلاناتي الرسمية : بوم بيتش : الفرع الأول (محاربين الظلام ) #2982UGP0 الفرع الثاني (محاربين&الظلام) #2LP0GL9L كلاش رويال : محاربين الظلام #8C8G20 صفحة القناة على الفيس بوك : https://www.facebook.com/Black-Ak-1730327673847307/ قروب القناة على الفيس بوك : https://www.facebook.com/groups/452927794872377/?fref=nf تويتر للتواصل : twitter : https://twitter.com/Chanel_black_ak
Views: 30645 Black Ak
Full Speed Ahead! Ahead of Time Compilation for Java SE
 
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David Buck, Principal Member of Technical Staff, Oracle One of the lesser-known features coming with JDK 9 is experimental support for ahead-of-time (AOT) compilation. Compiling Java bytecode into ready-to-execute machine code before runtime means that many applications may benefit from quicker startup and, in the case of multiple JVM instances, even lower memory consumption. In this demo-heavy session, you will see what advantages AOT has to offer and, perhaps even more importantly, what its limitations are. You will also get the opportunity to see Java’s new AOT compilation in action and leave with the knowledge needed to experiment on your own later. Although Java’s AOT is not yet ready for production use, this is a great chance to get a sneak peek at one of HotSpot’s most exciting new technologies.
Views: 2701 Java
Como resolver o erro Minecraft Java HotSpot(TM) 64-Bit Server VM
 
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Contato Twitter: http://goo.gl/26OEzq Orkuti: http://goo.gl/2A6WJJ Facebook (Novo): http://goo.gl/KxYl2U MSN (Windows Live Messenger): [email protected] Veja como fazer o MSN Windows live messenger voltar a funcionar: https://youtu.be/6wHN1ER4hc4 Video atualizado e melhor: https://www.youtube.com/watch?v=wIboIt34OEI
Views: 209971 Michael
TUTORIAL: COMO RESOLVER ERRO JAVA HotSpot(TM) 64-Bit Server VM
 
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Views: 20506 Devidgamers 100
Java Performance: Understand How Parallel GC Works
 
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http://www.informit.com/store/java-performance-livelessons-video-training-downloadable-9780133443554 This video is a sample excerpt from Java Performance LiveLessons. 4+ Hours of Video Instruction Based on the best-selling book,Java Performance, Java Performance LiveLessons covers the latest Oracle and third-party tools for monitoring and measuring performance on a wide variety of hardware architectures and operating systems. Renowned expert, Charlie Hunt, provides viewers with an overview of a modern Java Virtual Machine, the critical performance statistics to monitor within an operating system, JVM, and Java application, an overview of how the HotSpot garbage collectors work, an explanation of the garbage collection output produced by the garbage collectors, and a step-by-step approach to tuning a Java application. Charlie Hunt is the Performance Engineering Architect at Salesforce.com. He was previously at Oracle, where he was responsible for improving the performance of the HotSpot JVM and Java SE class libraries. He has also been involved in improving the performance of the Oracle GlassFish and Oracle WebLogic servers. A regular JavaOne speaker on Java performance, he is coauthor of Java Performance (Addison-Wesley, 2011) and NetBeans™ IDE Field Guide (Prentice Hall, 2005). Skill Level: Intermediate to Advanced Java programmer/developer Who Should Take This Course?: Beginner to Advanced Java and JVM performance tuning engineer, and Advanced Java user / developer What You Will Learn: The differences between a JRE and the JDK, how to install both, and the major components of the HotSpot Java Virtual Machine What performance statistics to monitor and collect and at each level of the software stack: OS, JVM, and Java application How to tune the JVM's garbage collector How to tune, step-by-step, the HotSpot JVM Course Requirements: Fluent with, or a good understanding of, the Java programming language Basic understanding of a Java Virtual Machine is helpful, but not required The LiveLessons Video Training series publishes hundreds of hands-on, expert-led video tutorials covering a wide selection of technology topics designed to teach you the skills you need to succeed. This professional and personal technology video series features world-leading author instructors published by your trusted technology brands: Addison-Wesley, Cisco Press, IBM Press, Pearson IT Certification, Prentice Hall, Sams, and Que. Topics include: IT Certification, Programming, Web Development, Mobile Development, Home and Office Technologies, Business and Management, and more. View all LiveLessons on InformIT at http://www.informit.com/livelessons
Views: 6342 LiveLessons
Volker Simonis — Heart Surgery: HotSpot Debugging at the OS Level
 
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Volker Simonis — Heart Surgery: HotSpot Debugging at the OS Level Joker 2014: annual Java conference in Russia St.Petersburg, Oct 20-21, 2014 Debugging Java applications is comfortable and simple, but if you want to look beyond the Java horizon, you need special knowledge and and different tools. This interactive session shows you how to debug a running VM or analyze a VM core file with a native debugger. You will also learn how to use some of the more than 1,200 VM options to trace or modify the VM behavior. This knowledge can greatly help you identify, isolate and reproduce the root cause of hard VM crashes, and it can also be pure fun to see which actual machine instruction the CPU is executing for your Java code.
Views: 1308 JUG .ru
Building and Tuning High Performance Java Platforms
 
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Recorded at SpringOne2GX 2015 Speaker: Emad Benjamin, VMWare Slides: http://www.slideshare.net/SpringCentral/building-and-tuning-high-performance-java-platforms This session will cover various GC tuning techniques and how to best build platform engineered systems; in particular the focus will be on tuning large scale JVM deployments. It is true that half of the world's Java applications have 2.x more hardware provisioned than what they really need, and 90% of these applications miss their SLA. In this session we showcase why this is the case, and demonstrate sizing techniques on how to platform engineer such systems without the need for over-provisioning and hence meeting SLA in a more feasible way. Come to this session to learn about GC tuning recipe that can give you the best configuration for latency sensitive applications. While predominantly most enterprise class Java workloads can fit into a scaled-out set of JVM instances of less than 4GB JVM heap, there are workloads in the in memory database space that require fairly large JVMs. We will look at various Java platform scales, some holding a few large JVMs of 90GB heap space, while other platforms are of thousands of JVM instances of less than 4GB heap space on each. We will also take a close look at an example XYZCars.com where a microservices approach was designed and deployed, we will talk through how to more correctly deploy microservices without out causing fragmentation of scale, and hence without impeding performance. In this session we take a deep dive into the issues and the optimal tuning configurations for tuning large JVMs in the range of 4GB to 360GB, using the GC tuning recipes that were gained over the past 15 years of GC tuning engagements. You should be able to walk away with the ability to commence a decent GC tuning exercise on your own. The session summarizes the techniques and the necessary JVM options needed to accomplish these complex tuning tasks, in addition to various virtualization best practices when dealing with such large Java systems. Naturally when tuning large scale JVM platforms, the underlying hardware tuning cannot be ignored, hence the session will take detour from the traditional GC tuning talks out there and dive into how you optimally size a platform for enhanced memory and CPU consumption.
Views: 15608 SpringDeveloper
Volker Simonis — Analyzing HotSpot Crashes
 
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Did you ever found hs_err_pid or replay_pid files in your Java application directory? Did your Java application ever crash and you didn't know why? This talk will unveil the contents stored by the HotSpot crash handler into the corresponding error files and how this information can be used to analyze and reproduce the crash. It will also introduce tools like the HotSpot Serviceability Agent which helps to introspect native core files and extract the relevant Java information from them which is otherwise not easily accessible by native debuggers.
Views: 382 JUG .ru
From Bytecode to Native Code in HotSpot JVM
 
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Конференция Soft Labs вышла на международный уровень - теперь она проходят на английском языке. Предлагаем посмотреть доклад "From Bytecode to Native Code in HotSpot JVM". Докладчик – Ionut Balosin – специалист в области разработки ПО: http://www.luxoft-training.com/trainers/ionut/
Views: 1175 LuxoftTrainingCenter
java xmx vm options for heap,nonheap
 
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java memory settings heap size,nonheap size,younggen,permgen How can I change the memory heap size settings of JVM java xmx setting
Views: 44344 Zariga Tongy
NetBeans Day - India: Dive Deep into Hotspot JVM Source Code Using Netbeans by Vladimir Kvashin
 
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Dive Deep into Hotspot JVM Source Code Using Netbeans by Vladimir Kvashin. NetBeans Day - India organised by JUG Hyderabad on 23-April-2016
Views: 222 JUG Hyderabad
From Bytecode to Native Code in HotSpot JVM - Ionut Balosin
 
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For more info please visit www.ionutbalosin.com 1. Understanding Bytecode (few instructions) 2. How to disassemble Bytecode 3. Bytecode execution workflow: - Interpreter - JIT Compiler 4. How to see native code (assembly code) from Bytecode 5. Case Study: show the performance for a Java program running: - in only Interpreted mode - using Tiered JIT Compilation
Views: 35 Ionut Balosin
JVM bytecode engineering 101
 
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This talk gets you started with JVM bytecode engineering. Kees Jan peels away the fluffy Java language syntax to lay bare the gears that make the JVM tick. He will show what options there are for you to compile bytecode and create classes just the way you want them to be. The talk starts by looking at the low level JVM architecture and the byte code design. You will learn how to compile your own class files from byte code. Kees Jan will demonstrate a number of byte code assemblers and disassemblers, discussing pro and con of each. You walk away from this talk with a solid understanding of class files and the JVM and byte code architectures. This talk is open for any developer who programs Java for their day job. Author: Kees Jan Kees Jan Koster is founder of Java-monitor.com, the free, on-line Java monitoring tool.
Views: 1918 Parleys
Troubleshooting Memory Problems in Java Applications
 
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Poonam Parhar, Consulting Member of Technical Staff, Oracle Troubleshooting memory problems can be tricky, but the right approach and proper set of tools can simplify the process substantially. Several kinds of OutOfMemoryError messages can be reported by the Java HotSpot VM, and it is important to understand these error messages clearly and have a wide range of diagnostic and troubleshooting tools in our toolkit to diagnose and root out these problems. This session discusses the right approach and a broad range of diagnostic tools that can be very useful in troubleshooting Java memory issues.
Views: 6584 Java
Advanced JVM Tuning
 
01:14:25
This session covers the latest advances in JVM performance analysis, including new analysis methodologies, JVM tuning, and Java code optimization. It also discusses new performance optimizations and features delivered in the Oracle JDK and Oracle’s HotSpot JVM. Finally it covers some of the more common performance pain points faced by Java deployments today and suggests analysis plans and tuning techniques to help improve performance. Author: David Keenan No bio available View more trainings by David Keenan at https://www.parleys.com/author/david-keenan Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials
Views: 2932 Oracle Developers
Permanent Generation Removal Overview
 
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The permanent generation in Oracle’s HotSpot JVM held metadata that HotSpot used to describe Java objects. The permanent generation was garbage collected along with the Java heap during full GC. The permanent generation has been removed in HotSpot for JDK8. This session briefly describes the permanent generation and the motivation for its removal. It also discusses side effects of the removal that may affect the execution of a Java application. Author: Coleen Phillimore Coleen Phillimore is a long standing member of the Hotspot Java virtual machine runtime group. View more trainings by Coleen Phillimore at https://www.parleys.com/author/coleen-phillimore Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials
Views: 674 Oracle Developers
How to fix [Bukkit] - "Error occurred during initialization of VM" Virtual machine problem!
 
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========================================­======== ★ See my channel here!!: http://www.youtube.com/channel/UCuayIieVTPdviecmLKIt62Q ========================================­======== Check out my twitter! (If you have it): https://twitter.com/BlueLixard ========================================­======== ★ BECOME A LIXARD TODAY!!!: http://www.youtube.com/channel/UCuayIieVTPdviecmLKIt62Q?sub_confirmation=1 ========================================­======== ★ Liked this video?? Well why not give it a like if so! ========================================­======== And as always, Thanks for watching! ========================================­========
Views: 111739 BlueLixard
minecraft error fix
 
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error occurred during initializtion of VM could not reserve enough space for 340787KB object heap java hotspot tm client VM warning: ignoring option permsize=192m; suport was removed in 8.0
Views: 6559 crank mind
Tuning Large Scale Java Platforms
 
01:32:28
Recorded at SpringOne2GX 2014. Speakers: Emad Benjamin, Jamie O'Meara Slides: http://www.slideshare.net/SpringCentral/tuning-large-scale-java-platforms The session will cover various GC tuning techniques, in particular focus on tuning large scale JVM deployments. Come to this session to learn about GC tuning recipe that can give you the best configuration for latency sensitive applications. While predominantly most enterprise class Java workloads can fit into a scaled-out set of JVM instances of less than 4GB JVM heap, there are workloads in the in memory database space that require fairly large JVMs. In this session we take a deep dive into the issues and the optimal tuning configurations for tuning large JVMs in the range of 4GB to 128GB. In this session the GC tuning recipe shared is a refinement from 15 years of GC engagements and an adaptation in recent years for tuning some of the largest JVMs in the industry using plain HotSpot and CMS GC policy. You should be able to walk away with the ability to commence a decent GC tuning exercise on your own. The session does summarize the techniques and the necessary JVM options needed to accomplish this task. Naturally when tuning large scale JVM platforms, the underlying hardware tuning cannot be ignored, hence the session will take detour from the traditional GC tuning talks out there and dive into how you optimally size a platform for enhanced memory consumption. Lastly, the session will also cover Pivotal Application Fabric reference architecture where a comprehensive performance study was done.
Views: 6671 SpringDeveloper
WILDFLY-11 - JVM Parameters configuration in standalone/domain mode
 
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WILDFLY-11 - JVM Parameters configuration in standalone/domain mode
Views: 1226 Veerababu Anupoju
IBM SPSS Analytic Server: Performance tuning the Java virtual machine
 
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This short video, the ninth in a series describing administration and use of IBM SPSS Analytic Server, explains the performance tuning properties of Analytic Server with a special focus on Java virtual machine options. Learn more about IBM SPSS: http://ibm.co/spsstrial Subscribe to the IBM Analytics Channel at https://www.youtube.com/subscription_center?add_user=ibmbigdata. The world is becoming smarter every day. Join the conversation on the IBM Big Data & Analytics Hub: • http://www.ibmbigdatahub.com • https://www.youtube.com/user/ibmbigdata • https://www.facebook.com/IBManalytics • https://www.twitter.com/IBMbigdata • https://www.linkedin.com/company/ibm-big-data-&-analytics • https://www.slideshare.net/IBMBDA
Views: 634 IBM Analytics
java.lang.OutOfMemoryError: Java heap space
 
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java.lang.OutOfMemoryError: Java heap space Troubleshooting Guide for beginners Reference: http://javaeesupportpatterns.blogspot.com/2011/11/outofmemoryerror-java-heap-space.html
How To Fix Java Virtual Machine Error
 
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This video will teach you how to fix the cannot start Java virtual machine error
Views: 12721 GeekTekk
Corrigindo Erro Java Virtual Machine Launcher no Minecraft
 
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Views: 55359 ElainGamer
Debug JVM using JVisual VM | Heap Dump | Thread Dump | Profiling | Tech Primers
 
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This video covers how to use JVisual VM to see the heap dump, thread dump and profiling options of the JVM. Slack Community: https://techprimers.slack.com Twitter: https://twitter.com/TechPrimers Facebook: http://fb.me/TechPrimers GitHub: https://github.com/TechPrimers or https://techprimers.github.io/ Video Editing: iMovie Background Music: Broke For Free - Day Bird https://brokeforfree.bandcamp.com/track/day-bird The Passion HiFi - What We Came To Do Joakim Karud
Views: 9920 Tech Primers
How To: Fix Minecraft Crashes & Errors in 1.7.10-1.13 (Working 2018)
 
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Welcome to Wyl33 J's first ever tutorial! Today, I show you how to solve most Minecraft errors and crashing problems. Please share this to everyone, I'd like to try and help as many people as possible! In this video, I show you how to fix: - AL lib: (EE) alc_cleanup: 1 device not closed - Failed to write core dump. Minidumps are not enabled by default on client versions of Windows - Java HotSpot(TM) 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release - Textures being stuck in low resolution - Other minor errors Links: Optifine: http://optifine.net/downloads Sphax (BDCraft): http://bdcraft.net/purebdcraft-minecraft Java 64-Bit: http://www.java.com/en/download/manual.jsp Need These? -Xmx2048M -Xmx2048M -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M Go here if you don't have an options file: http://en.osdn.jp/projects/sfnet_mcsyncing/downloads/minecraft/options.txt/ *I forgot to mention that you can run Minecraft as "Administrator" and it may fix your problem*
Views: 169564 Wyl33 J
Lets learn to talk to GC logs by Poonam Parhar
 
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With JEP 271, GC logging has been re-implemented to use the Unified JVM Logging Framework introduced with JEP 158. Unified JVM logging introduced a new JVM option -Xlog, and also defined the category tags for all the different components of the JVM. With 'gc' tag specified for the GC logging, -Xlog:gc option along with the other granular tag-sets, levels and decorations can be used to enable the GC logging for different parts of the GC system at various levels of detail. This talk discusses the GC logging JVM options that are going to be removed in Java 9, and covers in detail the parameters that can be used with Xlog:gc option to get the GC logging equivalent to what we could produce with the now removed JVM options. This session will also take a deep dive into looking at the sample GC logs generated with the new logging mechanism, and will throw light on how those logs can be read and interpreted. Poonam Parhar, currently a JVM Sustaining Engineer at Oracle where her primary responsibility is to resolve customer escalated problems against JRockit and HotSpot JVMs. She loves debugging and troubleshooting problems, and is always focused on improving the serviceability and supportability of the JVM. She has nailed down many complex Garbage Collection issues in the HotSpot JVM, and is passionate about improving the debugging tools and the serviceability of the product so as to make it easier to troubleshoot and fix Garbage Collector related issues in the JVM. In an attempt to help the customers and the Java community, she shares her work experiences and knowledge through the blog she maintains here: https://blogs.oracle.com/poonam/.
Views: 1439 Devoxx
JVM Mechanics by Douglas Hawkins
 
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HotSpot promises to do wonders for us by Just-in-Time (JIT) compiling the "right" code for us, but how does it makes those decisions? And, perhaps more importantly, what happens when it's wrong? In this talk, you'll learn through real code examples just how the JVM decides to compile your code, deoptimize your code, and stop-the-world for a GC. Douglas Hawkins has been passionately developing software for the past 10 years -- creating applications for bioinformatics, finance, and retail. But Doug's true interest has always been VM internals. Now a VM engineer at Azul Systems, he works on Azul's Zing VM full-time and is the lead developer of Azul's ReadyNow technology.
Views: 3598 Devoxx
Virtualizing and Tuning Large Scale Java Platforms
 
01:33:44
Recorded at SpringOne2GX 2013 in Stana Clara, CA Speakers: Emad Benjamin and Guillermo Tantachuco The session will cover various GC tuning techniques, in particular focus on tuning large scale JVM deployments. Come to this session to learn about GC tuning recipe that can give you the best configuration for latency sensitive applications. While predominantly most enterprise class Java workloads can fit into a scaled-out set of JVM instances of less than 4GB JVM heap, there are workloads in the in memory database space that require fairly large JVMs. In this session we take a deep dive into the issues and the optimal tuning configurations for tuning large JVMs in the range of 4GB to 128GB. In this session the GC tuning recipe shared is a refinement from 15 years of GC engagements and an adaptation in recent years for tuning some of the largest JVMs in the industry using plain HotSpot and CMS GC policy. You should be able to walk away with the ability to commence a decent GC tuning exercise on your own. The session does summarize the techniques and the necessary JVM options needed to accomplish this task. Naturally when tuning large scale JVM platforms, the underlying hardware tuning cannot be ignored, hence the session will take detour from the traditional GC tuning talks out there and dive into how you optimally size a platform for enhanced memory consumption. Lastly, the session will also cover Pivotal App Fabric reference architecture where a comprehensive performance study was done. Learn more about
Views: 2987 SpringDeveloper
Thermostat - open source monitoring tool for Hotspot JVM
 
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Well-tuned production systems are critical to your success. See a demo of Red Hat Enterprise Linux tuning and measurement tool -- Thermostat and learn how to observe and improve your Java performance.
Solucion Error Could not create the java virtual machine Minecraft(No premium)
 
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Hola amigos. En el video de hoy les enseño como solucionar el Error Could not create the java virtual machine Minecraft No Premium (pirata) espero les sea de ayuda. Links: http://www.mediafire.com/download/kaibsybjxgkuvqr/Solucionar_Error.rar tags: Solucion Error Could not create the java virtual machine Minecraft(No premium), Error Could not create the java virtual machine, solucionar errores de minecraft, Error Could not create the java virtual machine minecraft pirata, errores minecraft pirata, arreglar Error Could not create the java virtual machine minecraft, arreglar Error Could not create the java virtual machine minecraft pirata, Error Could not create the java virtual machine, solucionar fallos minecraft, quitar Error Could not create the java virtual machine minecraft pirata, solucionar problemas de minecraft no premium, solucionar errores de minecraft pirata, minecraft no funciona, minecraft no ejecuta.
Views: 77753 Cardinale
Hotspot & AOT (Dmitry Chuyko, Russia)
 
49:01
Different Java implementations exist. Your code lives multiple lifes inside them and JIT compilers provide performance behind the scenes. Some JVMs have ahead-of-time (AOT) compilation that shortens the path. Statement of the problem is different, as well as solutions. Let’s talk about why do we need pre-compiled code, how it can already be produced and used with Hotspot. How Project Graal lets Java to compile Java to native code and how new Java-Level JVM Compiler Interface incorporates Java to compilation work of JVM.
Views: 249 jeeconf
Java HotSpot(TM) Client VM warning:(...)future release - SOLUCION
 
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Hola, este es mi primer vídeo de Minecraft, no voy a subir series ni nada de eso, solo les quería compartir una solución que no encontré en Youtube y me pareció que seria mejor subirla para que solucionen su problema, hasta la próxima :33
Views: 10266 Ash :3
How to Increase Java Heap Memory Size in Ubuntu Linux JVM
 
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This video explains How to Increase Java Heap Memory Size in Ubuntu Linux. I will show you how to use the -XX:+PrintFlagsFinal to find out your heap size detail. Running Java applications in computers takes some memory during the process which is known as Java memory (Java heap). Frequently, it is necessary to increase that heap to prevent throttling the performance of the application.
Views: 93 Prize Bond Fund
What’s Cool in the SAP JVM
 
01:06:48
This session introduces the JVM offered by SAP. This virtual machine was designed and developed with supportability, broad platform support, and reliability as the main paradigms. It is more than just another JVM, because it is enhanced by many extra features. Learn about enhancements for developers, such as debugging on demand, and for admins, such as extended tracing. The session also demonstrates supportability tools such as a complete profiling solution. Authors: Thomas Klink Thomas Klink is an Development Architect working in the JVM area since 2010. The main focus of his work lies in the area of ​​monitoring and support as well as in the hotspot area. View more trainings by Thomas Klink at https://www.parleys.com/author/thomas-klink Goetz Lindenmaier Goetz Lindenmaier works for SAP in the SAP JVM JIT Compiler Technology group. He worked on SAP's IA64 port and crafted various optimizations in the C2 JIT compiler of HotSpot. He's currently one of the main contributors to the OpenJDK PowerPC/AIX porting project. View more trainings by Goetz Lindenmaier at https://www.parleys.com/author/goetz-lindenmaier Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials
Views: 1095 Oracle Developers
How to set and increase java heap size on Windows 7
 
04:31
In this video I tried to show how to set and increase java heap space on Windows 7. You can do it by specifying size with the runtime parameter on the java option in the control panel or by specifying the size in the VM argument on java Eclipse dynamically which works at runtime. However, if you want to make it persistent, you can make it from the clipse.ini file located in the Eclipse distribution directory. Just open the eclipse.ini file and scroll down to the bottom and specify the same argument which I have used in the video. Caution: don't increase heap size equal to the physical memory(RAM), otherwise your system might crash.
Views: 26775 Md. Rezaul Karim
Stack and Heap memory in java basic knowledge
 
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the things which we ignore the most often become the most important . Here's a basic understanding on heap and stack memory in java.
Views: 79750 Prashun Das
Recipe 2: Memory settings
 
05:50
NiFi Cookbook recipe on how to configure the JVM memory settings
Views: 1256 Silver Cloud
95.Java Intro -Chapter14.Wrap Up-Lesson2.Command Line Options for Java
 
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Visit My Channel : https://www.youtube.com/Javavideotutorails Java is a general-purpose, concurrent, class-based, object-oriented computer programming language that is specifically designed to have as few implementation dependencies as possible. It is intended to let application developers "write once, run anywhere WORA meaning that code that runs on one platform does not need to be recompiled to run on another. Java applications are typically compiled to byte code Class file that can run on any Java virtual machine JVM regardless of computer architecture.
Views: 121 Javavideotutorails
JVM Tuning: Memory Management, JVisualVM, VisualGC
 
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Java provides a lot of options to tune JVM as per our application needs. In this video I shall help you learn the basics of JVM Tuning: 1. Managing JVM memory 2. Configuring Garbage Collectors 3. Loging JVM GC Cycles 4. Monitoring Applications with jVisualVM and VisualGC Please post your valuable feedback in the comments. Don't forget to like the video and subscribe. Here's the link to my full playlist: https://www.youtube.com/playlist?list=PLISEtHX24fIsmC7huN9VrUq4G9irqpZYG
Views: 236 Madan Neelapu
Como Resolver o erro do Minecraft ''Could not create the java virtual machine''
 
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nome da variável :_JAVA_OPTIONS valor da variável:-Xmx512M Se o seu pc for Windows XP/8 o processo e o mesmo. Se eu te ajudei de um Gostei. Se nao funcionar comente que eu posso te ajudar.
Views: 6247 Andrews Boss
OutOfMemoryError Java Heap Space Fix - Heap Dump Analysis VisualVM Tutorial
 
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In this tutorial I show you how and why a java.lang.OutOfMemoryError can occur when running a Java application. I also show you how to configure your application to perform a Java Heap Dump if an out of memory errors. Additionally; I perform heap dump analysis by importing it into a Java profiling tool such as VisualVM. This will help find the root cause. First I set the Java Heap size to 64m by changing the –Xms and –Xmx virtual machine arguments. What does –Xms stand for? This java virtual machine argument allows you to specify the initial size (bytes) of the java heap. What does –Xmx stand for? This java virtual machine argument allows you to specify the maximum size, in bytes, of the memory allocation pool. We set the java heap memory to such a small size that it can’t handle and save the amount of java objects being created. Once there is not enough memory left to allocate objects, the application will fail with an out of memory error. I then configure the application to perform a Heap Dump on java.lang.OutOfMemoryError by specifying the flag: XX:+HeapDumpOnOutOfMemoryError This heap dump will be present in your applications working directory. If you would like to change the output path of the heap dump you can specify it by passing the: -XX:HeapDumpPath I then proceed to execute the java application which has an infinite loop that will create and place objects on an Array list. The application eventually fell over and threw an OutOfMemoryError when we allocated a Brick Object and tried to place it in the list. The list was at its maximum capacity and tried to resize. An arraylist is backed by an array, which has a finite number of elements. Each time the list’s backing array has reached maximum capacity it defines a new array typically double the size and copies the old array’s contents over into the new array. Then the GC clears the old array. Unfortunately there was not enough room for the new backing array in the Java Heap which caused the application to crash. When the java failure occurred it left the java heap with file name pattern java_pid{process-id}.hprof, this file can then be imported into VisualVM Java profiler for analysis of the applications state when the out of memory error occurred. After importing the hprof file into VisualVM profiler we can analyse the java thread’s status and the memory allocation. We can see the last stack trace before the failure and the huge amount of Brick allocations. If your application ever crashes, it’s good to inspect the heap dump to find out what was going on. This will hopefully identify causes and will prevent future failures if you can put a fix in. If you work with a cloud based ephemeral file system, then you might not be able to create / access a heap dump, as the application’s file system is scrapped and a new application is started on failure. There are ways to work around this such as attaching a hard drive to the instance. It depends on the nature of the system. I hope you enjoyed the tutorial! Don’t forget to subscribe for more great tech videos! Thanks, Philip Eclipse VisualVM Launcher Integration Set-up Guide https://www.youtube.com/watch?v=W60wvJ885iE&t Java Heap Dump Analysis – VisualVM Tutorial https://www.youtube.com/watch?v=Uubqc76h-jo VisualVM https://visualvm.github.io/ Eclipse Visual VM Integration https://visualvm.github.io/idesupport.html Java Profiling http://docs.oracle.com/javase/7/docs/technotes/guides/visualvm/profiler.html What are the -xms and -xmx parameters when starting JVMs? https://stackoverflow.com/questions/14763079/what-are-the-xms-and-xmx-parameters-when-starting-jvms
Views: 6227 Philip Starritt
Help me everytime i click ANY Button on the mc home screen it crashes (Minecraft Version:ALL)
 
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Heres the crash report # # A fatal error has been detected by the Java Runtime Environment: # # EXCEPTION_INT_DIVIDE_BY_ZERO (0xc0000094) at pc=0x6913187c, pid=4092, tid=0x0000135c # # JRE version: Java(TM) SE Runtime Environment (8.0_111-b14) (build 1.8.0_111-b14) # Java VM: Java HotSpot(TM) Client VM (25.111-b14 mixed mode windows-x86 ) # Problematic frame: # C [atioglxx.dll+0x10187c] # # Failed to write core dump. Minidumps are not enabled by default on client versions of Windows # # An error report file with more information is saved as: # C:\Users\Joe\AppData\Roaming\.minecraft\hs_err_pid4092.log # # If you would like to submit a bug report, please visit: # http://bugreport.java.com/bugreport/crash.jsp # The crash happened outside the Java Virtual Machine in native code. # See problematic frame for where to report the bug. # AL lib: (EE) alc_cleanup: 1 device not closed Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
Views: 1486 Tutorials Dude
Java JVM Heap Memory Introduction
 
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Introduction to Java JVM memory and changing how much heap memory to give the JVM. Demo code & Links: https://github.com/a-r-d/java-1-class-demos/tree/master/jvm-memory-and-tuning Examples: -Xmx1G - give jvm 1 gigabyte max heap memory -Xms512m - give jvm 512 megs heap to initially
Views: 1693 Aaron Writes Code
Исправляем ошибку Java Virtual Machine Launcher
 
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Как исправить ошибку виртуальной машины Java Virtual Machine Launcher во время установки Джава, необходимой для запуска многих игр ПОЛЕЗНЫЕ ССЫЛКИ: ➔ Инструкция - https://it-tehnik.ru/software/recovery/java-virtual-machine-launcher.html ➔ Группа Вконтакте - https://vk.com/it_tehnik ➔ Страница Facebook - https://www.facebook.com/ITtehnik ➔ Официальный сайт - http://it-tehnik.ru ➔ Одноклассники - https://ok.ru/group/54086036160763 ➔ Pinterest - https://www.pinterest.com/vereschaka84/it-tehnik/ ➔ Twitter - https://twitter.com/it_vfelk

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