Don't Put Fat Jars in Docker Images
Philipp Hauer's Blog Engineering Management, Java Ecosystem, Kotlin, Sociology of Software Development Posted on Oct 14, 2019. Updated on Jun 12, 2022 Putting a fat jar into a Docker container is a waste of storage, bandwidth and time. Fortunately, we can leverage Docker’s image layering and registry caching to create incremental builds and very small artifacts. For instance, we could reduce the e
Jolokiaã§MBeanã«ã‚¢ã‚¯ã‚»ã‚¹ã™ã‚‹ | Ore no homepage
ã¡ã‚‡ã£ã¨JVMã£ã¦ã‹MBeanã®æƒ…å ±ã‚’ã¶ã£ã“ã¬ãツールを作る必è¦ãŒã‚ã£ã¦ã€æœ€åˆjythonã§ä½œã£ãŸã‚“ã ã‘ã©jythonã«ã¯ã„ã‚ã„ã‚失望ã—ãŸã€‚ã§ã€åŒåƒšã«Jolokiaã£ã¦ã®ãŒã‚ã‚‹ã¨æ•™ãˆã¦ã‚‚らã£ãŸã®ã§ã™ãŒã€ã“ã‚ŒãŒãªã‹ãªã‹ã‚¤ã‚±ã¦ã‚‹ã€‚Jolokiaã¨ã„ã†ã®ã¯ã€ç°¡å˜ã«è¨€ã†ã¨ã€MBeanã«HTTP経由ã§ã‚¢ã‚¯ã‚»ã‚¹ã§ãるよã†ã«jmxã®å£ã‚’空ã‘ã¦ãれるJavaã®ã‚¨ãƒ¼ã‚¸ã‚§ãƒ³ãƒˆã€‚ã“ã„ã¤ã‚’Javaプãƒã‚°ãƒ©ãƒ ã‚„JavaãªãƒŸãƒ‰ãƒ«ã‚¦ã‚§ã‚¢ã«ä»•è¾¼ã‚“ã§ã‚„ã‚‹ã ã‘ã§HTTPã®å£ãŒç©ºã„ã¦ã€ãã“経由ã§ã„ã‚ã„ã‚ã§ãる。レスãƒãƒ³ã‚¹ã¯JSONã§å¸°ã£ã¦ãる。 Cassandraã®è¨˜äº‹ã¯ã¾ãŸæ¬¡å›žï½—ï½—ï½— ã¾ãã€ä»Šå›žã‚‚Jolokiaã«æ‰‹ã‚’出ã—ãŸã®ã‚‚Cassandraèµ·å› ãªã‚“ã ã‘ã©ã。Cassandraã¯ãƒ¬ã‚¤ãƒ†ãƒ³ã‚·ã‚„リード/ライト数ãŒMBeanã«æ ¼ç´ã•ã‚Œã¦ã¦ã€ãã„ã¤ã‚’抜ã„ã¦ã‚°ãƒ©ãƒ•æç”»ã•ã›ãŸã„ãªãã€ã¨ã€‚Cassandraã®ãƒžãƒã‚¸ãƒ¡ãƒ³ãƒˆãƒ„ールã¨ã—ã¦ã¯ã€
GitHub - uber-common/jvm-profiler: JVM Profiler Sending Metrics to Kafka, Console Output or Custom Reporter
Uber JVM Profiler provides a Java Agent to collect various metrics and stacktraces for Hadoop/Spark JVM processes in a distributed way, for example, CPU/Memory/IO metrics. Uber JVM Profiler also provides advanced profiling capabilities to trace arbitrary Java methods and arguments on the user code without user code change requirement. This feature could be used to trace HDFS name node call latency
jjugccc2018 app review postmortem
3. アジェンダ • 自己紹介 • アーã‚テクãƒãƒ£ã®èª¬æ˜Ž • レビューã«ã¤ã„㦠– ã©ã®ãƒ¬ãƒ™ãƒ«ã§ï¼Ÿ – ã©ã†ã„ã†è¦³ç‚¹ã§ï¼Ÿ – 指摘ãŒå¤šã„ã‚‚ã®/具体的ãªå†…容 • 性能å•é¡Œ – JVMã®è©± – JVMã®å¤–ã®è©± • 障害例 • ボトルãƒãƒƒã‚¯ã®è¦‹ã¤ã‘æ–¹ • è² è·è©¦é¨“ • ãŠã¾ã‘ 3 4. 自己紹介 • Name: Kiyotaka Suzuki • Twitter: @tamtam180 • Main works – SquareEnix (5.5Y) • PlayOnline, FF-XIV, etc. – SmartNews (4Y〜) • Cross-functional Expert Team – Software Engineer – 広告, 公共 4
JVMアプリケーションをé‹ç”¨ã™ã‚‹éš›ã®ãƒ¡ã‚¸ãƒ£ãƒ¼ã©ã“ã‚ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ãƒã‚¤ãƒ³ãƒˆãƒ¡ãƒ¢ - yoskhdia’s diary
JVMã«ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°é …ç›®ã¯å¤šã€…ã‚ã‚Œã©ã€ãƒ—ãƒãƒ€ã‚¯ã‚·ãƒ§ãƒ³ã§é‹ç”¨ã™ã‚‹éš›ã«äºˆã‚ãŠã•ãˆã¦ãŠããŸã„é …ç›®ã‚’ã¾ã¨ã‚ã¦ã¿ã‚‹ã‚¨ãƒ³ãƒˆãƒªã§ã™ã€‚*1 å‹¿è«–ã€OSã‚‚JVMもデフォルトã§ã‚る程度ã®ãƒ‘フォーマンスã¯ç™ºæ®ã§ãã€è¨ˆæ¸¬ã‚’ä¼´ã‚ãªã„ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã¯æ‚ªæ‰‹ã§ã‚ã‚‹ã“ã¨ã¯ã‚ˆã知られã¦ã„ã¾ã™ã€‚ ã—ã‹ã—ã€è¨å®šã—ã¦ãŠã‹ãªã„ã¨ãƒ‘フォーマンスã«ãã®ã¾ã¾å½±éŸ¿ã™ã‚‹ã¨åˆ†ã‹ã‚‹ã‚‚ã®ã‚’調ã¹ãªã„ã®ã¯è£¸ã§æˆ¦å ´ã«èµ´ãよã†ãªã‚‚ã®ã§ã™ã€‚*2 ã©ã‚“ãªé …目をã©ã†å¤‰æ›´ã™ã‚Œã°è‰¯ã„ã®ã‹çŸ¥ã£ã¦ã„ã‚‹ã“ã¨ã¯é‡è¦ãªæ¦å™¨ãªã®ã§ã™ã€‚ ãªãœèª¿ã¹ã‚‹ã®ã‹ 今回ã€ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ãƒã‚¤ãƒ³ãƒˆã‚’調ã¹ã‚‹ã«ã‚ãŸã£ã¦ã€ç§ã®ãƒ¢ãƒãƒ™ãƒ¼ã‚·ãƒ§ãƒ³ã¯ã©ã“ã«ã‚ã‚‹ã®ã‹ã‚’考ãˆã‚‹ã¨ã€ä»¥ä¸‹ã®è¦ä»¶ã‚’満ãŸã—ãŸã„ã¨ã„ã†ã“ã¨ãŒã‚ã’られã¾ã™ã€‚ アプリケーションã¨ã—ã¦æ±‚ã‚られるå“質水準ã¨ã—ã¦å‹•ä½œã™ã‚‹ → 性能目標 異常時ã«äº‹è±¡ã‚’追ã†ã“ã¨ãŒã§ãã‚‹ ã“ã“ã§ã„ã†å“質水準・異常ã¨ã¯ã€ãƒ‘フォーマンスãŒæ˜Žã‚‰ã‹ã«ä½Žã„ã€ã‚¢ãƒ—リケーションãŒã‚¯ãƒ©ãƒƒã‚·ãƒ¥ã™
JVM Performance Tuning
Last week was JBoss World, and it was exciting to be a part of it. I gave a presentation on performance tuning our Enterprise Application Platform or EAP, and it was packed. In fact, people were sitting on the floor in pretty much all available space. What struck me about the presentation, and much of the discussion I had with individuals afterwards, is that JVM tuning is a big topic. So, I though
JavaPoly.js — Java(script) in the Browser
Introduction JavaPoly.js is a library that polyfills native JVM support in the browser. It allows you to import your existing Java code, and invoke the code directly from Javascript. JavaPoly works even if the user does not have Java installed on their computer. It finally allows Java to become a first class citizen by running directly in the browser's script tags (and interacting directly with th
High Performance Solr and JVM Tuning Strategies used for MapQuest’s Search Ahead: Presented by Darren Spehr, MapQuest
High Performance Solr and JVM Tuning Strategies used for MapQuest’s Search Ahead: Presented by Darren Spehr, MapQuest MapQuest developed a search ahead feature for their mobile app to enable auto-complete searching across their large dataset. They used Solr and implemented various techniques to optimize performance, including custom routing, analysis during ETL, and extensive JVM tuning. Their arc
Intern Memory: Unlocking the Secrets of Java 6, 7, and 8
Home Blog String Intern in Java 6, 7, and 8: The Memory Optimization If you’re diving into the world of Java programming, understanding how string intern works in Java 6, 7, and 8 is crucial. String intern is a memory optimization technique that can significantly impact the performance of your Java applications. In this comprehensive guide, we’ll explore everything you need to know about string in
ã‚ãªãŸã¨ã‚¹ãƒ¬ãƒƒãƒ‰ãƒ€ãƒ³ãƒ— - 第八回 #渋谷java
第八回 #渋谷java ã§ç™ºè¡¨ã—ãŸã€Œã‚ãªãŸã¨ã‚¹ãƒ¬ãƒƒãƒ‰ãƒ€ãƒ³ãƒ—ã€ã§ã™ã€‚ スレッドダンプã®ä½¿ã„ã¿ã¡ã€å–ã‚Šæ–¹ã€èªã¿æ–¹ã«ã¤ã„ã¦èª¬æ˜Žã—ã¦ã„ã¾ã™ã€‚ スレッドダンプã“ã‚ããªã„。
Java トラブル解æžæ”¯æ´ãƒ„ール HeapStats ã®ã”紹介
2. Open Source Conference 2014 Hokkaido 自己紹介 ïµ ç«¹æž— 信哉(+ShinyaTAKEBAYASHI) ïµ æ˜¨æ™©ã‚¬ãƒ©ãƒŠã‚’é£²ã‚“ã§çœ ã‚Œãªããªã£ãŸã²ã¨ ïµ ä»•äº‹ ïµ ç¤¾å†…ã® Java 駆ã‘è¾¼ã¿å¯º ïµ ãƒˆãƒ©ãƒ–ãƒ«è§£æžæ”¯æ´ï¼ŒæŠ€è¡“æ”¯æ´ ïµ Java 仮想マシン，Linux カーãƒãƒ«ï¼Œ ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ‘ケットãªã©ã®è§£æž ïµ è¶£å‘³ ïµ ãƒ¢ãƒŽã¥ãり（ソフトウェア（C/C++/x86ASM）電å工作） ïµ ãƒãƒ¼ãƒ‰ãƒã‚¤ã‚¯ ïµ ãã®ä»– ïµ Linux よりWindows，Windows より BSD
java.lang.OutOfMemoryError #渋谷java
PPLサマースクール2016「商用Java処ç†ç³»ã®ç ”究開発ã€ã®ãƒ‘ート2ã§ã™ï¼Ž http://ppl.jssst.or.jp/index.php?ss2016 Java言語処ç†ç³»ã®å®Ÿè£…ã«ã¤ã„ã¦è©³èª¬ã™ã‚‹ï¼Žã¾ãšJava仮想マシンã®æ¦‚è¦ã«ã¤ã„ã¦è¿°ã¹ï¼Œãã®ä¸»è¦ãªæ§‹æˆè¦ç´ ã¨ã—ã¦ï¼Œã‚¯ãƒ©ã‚¹ç®¡ç†ã¨ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ—リタ，ヒープ管ç†ã¨ã‚¬ãƒ™ãƒ¼ã‚¸ã‚³ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ï¼Œã‚¹ãƒ¬ãƒƒãƒ‰ç®¡ç†ã¨åŒæœŸæ©Ÿæ§‹ï¼ŒJITコンパイラã¨ã®é€£æºï¼Œãªã©ã«ã¤ã„ã¦èª¬æ˜Žã™ã‚‹ï¼Žæ€§èƒ½æ”¹å–„ã®ãŸã‚ã«è¡Œã£ãŸå„種手法ã«ã¤ã„ã¦ã‚‚触れる． ä»–ã®ãƒ‘ート 1 Javaã®ç™»å ´ã¨ç™ºå±• http://www.slideshare.net/Tamiya_Onodera/java-66081108 2 Java仮想マシンã®å®Ÿè£…技術 http://www.slideshare.net/KiyokuniKawachiya/java-66003903 3 Java Just-In-Timeコンパイラã®
GitHub - apigee/trireme: Embed Node.js inside a Java Virtual Machine
Trireme runs Node.js scripts inside the JVM. This is important because there is a lot of software out there (including our own) that is built in Java and isn't going to get rewritten in JavaScript now or in the future. Trireme is specifically designed to be embeddable within any Java program. There is a lot of support inside Trireme for this specific case: Many Node.js scripts can run inside a sin
Inside The Java Virtual Machine
The document discusses a programming project in Java. It includes code for a Main class with a main method that prints "Hello World". There are also hexadecimal strings and copyright notices from the company Plugram, Inc. suggesting it is describing how to set up and run a simple Java program.Read less
Java 7 CMS GCã®åŸºæœ¬çš„ãªæƒ…å ±ã®æ•´ç† - nekop's blog
ãƒãƒƒãƒå‡¦ç†ãªã©ã‚¹ãƒ«ãƒ¼ãƒ—ットé‡è¦–ã®ã‚¢ãƒ—リケーションã¯ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã®ãƒ‘ラレルGCã§è‰¯ã„ãŒã€Java EEアプリケーションサーãƒãªã©ãƒ¬ã‚¹ãƒãƒ³ã‚¹ã‚¿ã‚¤ãƒ é‡è¦–ã®ã‚‚ã®ã‚„Hadoopãªã©ã®ã‚¯ãƒ©ã‚¹ã‚¿ç³»ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã§æ»æ´»ç›£è¦–ã«å¼•ã£æŽ›ã‚‹ç³»ãªã©ã®stop the worldã‚’ãªã‚‹ã¹ãé¿ã‘ãŸã„ã„ã‚ゆるサーãƒç³»ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã‚’é‹ç”¨ã™ã‚‹å ´åˆã«ã¯ã€UseConcMarkSweepGCを付与ã—ã¦åœæ¢æ™‚é–“ã®çŸã„CMS GCを使ã†ã€‚ãã®å ´åˆã«CMSã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ã«è¸ã¿è¾¼ã‚‚ã†ã¨ã™ã‚‹ã¨ãªã‚“ã ã‹é›£ã—ã„記述ãŒã„ã£ã±ã„ã§è‹¥å¹²å›°ã‚‹ã®ã§ã€ç°¡å˜ãªã‚¬ã‚¤ãƒ‰ã‚’メモã¨ã—ã¦æ›¸ã„ã¦ãŠã。 対象ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯ä»¥ä¸‹ã€‚ $ java -version java version "1.7.0_51" OpenJDK Runtime Environment (fedora-2.4.5.1.fc20-x86_64 u51-b31) OpenJDK 64-Bit Serve
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GitHub - php-java/php-java: ☕😠Implement JVM by PHP
GraalVM
Efficient data transfer through zero copy
Java 8 ã®ãƒ’ープモニタリング
Efficient data transfer through zero copy
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