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GitHub - tkruse/gpi: grape package installer
README.md gpi - Groovy package installer NOT CONTINUED: See gvm / SDKMAN! instead. Pre-alpha project to become something like cpan / pip / gem / npm for JVM languages. That is an OS independent packaging system for Free Java Software. Inspired also by gvm and jpm4j. In the current state the gpi script downloads jars by wrapping the standard Groovy grape install command, to the Groovy home folder (
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
jmapを用ã„ãŸJVM Heapã®çŠ¶æ…‹èª¿æŸ»
メモ。 å‚考：http://www.javainthebox.net/laboratory/JavaSE6/managementtools/mngtools.html jmapã¯ã€JVMã®Heapメモリ内ã®æƒ…å ±ã‚’dumpã™ã‚‹ãŸã‚ã®ãƒ„ールã§ã™ã€‚ http://docs.oracle.com/javase/jp/6/technotes/tools/share/jmap.html 引数ã«javaã®ãƒ—ãƒã‚»ã‚¹IDを渡ã—ã¦ã‚ã’ã‚‹ã¨ã€å½“該プãƒã‚»ã‚¹ã®ãƒ¡ãƒ¢ãƒªæƒ…å ±ã‚’ãƒ€ãƒ³ãƒ—ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ jmap -dump:format=b,file=[file name] [pid] 上記ã®ä¾‹ã§ã¯ã€ãƒã‚¤ãƒŠãƒªå½¢å¼ã§heapã®ãƒ€ãƒ³ãƒ—æƒ…å ±ã‚’å‡ºåŠ›ã—ã¾ã™ã€‚ ダンプã—ãŸãƒ•ã‚¡ã‚¤ãƒ«ã¯è‰²ã€…ãªãƒ„ールã§å¯è¦–化ãŒå¯èƒ½ã§ã™ãŒã€javaã®æ¨™æº–コマンドã§ã‚ã‚‹jhatãŒä¸€ç•ªæ¥½ã ã¨æ€ã„ã¾ã™ã€‚ jhat [file name] 引数ã®ãƒ•ã‚¡ã‚¤ãƒ«ã«ã¯ã€ä¸Šè¿°
Getting Started with the G1 Garbage Collector
Purpose This tutorial covers the basics of how to use the G1 garbage collector and how it can be used with the Hotspot JVM. You will learn how the G1 collector functions internally, the key command line switches for using G1, and options for logging its operation. Time to Complete Approximately 1 hour Introduction This OBE covers the basics of Java Virtual Machine(JVM) G1 Garbage Collection (GC) i
High Performance Networking on JVM
HIGH PERFORMANCE NETWORKING ON THE JVM ã¨ã„ã†ãƒ—レゼン記事を見ã¤ã‘ãŸã®ã§èªã‚€ã¤ã„ã§ã«ã–ã£ãりメモ翻訳。 NORMAN MAURER RedHat (JBoss) - EAP コアãƒãƒ¼ãƒ Apple 社ã®å…ƒä¸‹è«‹ Netty in Action 著者 Apache Software Foundation ã®ãƒ¡ãƒ³ãƒãƒ¼ Netty / Vert.x コアディベãƒãƒƒãƒ‘ー Java, Scala Twitter: @normanmaurer GitHub: https://github.com/normanmaurer 一般的㫠本当ã«å¿…è¦ãªã‚‚ã®ã¯æœ€é©åŒ–ã ã‘ã 。 1000åŒæ™‚接続 != 大è¦æ¨¡ã€‚ 数百程度ã®æŽ¥ç¶šã‚’使ã†ã ã‘ãªã‚‰ãƒ–ãƒãƒƒã‚ング I/O を使ã£ã¨ã‘。 å•é¡Œã‚’見ã¤ã‘ã‚‹ãŸã‚ã«ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©ã‚’使ãˆã€‚推測ã™ã‚‹ãªã€‚ 変更ã®å‰å¾Œã§å¿…ãšãƒ†ã‚¹ãƒˆã—ã‚。ãã—ã¦ã‚¦ã‚©ãƒ¼ãƒ アップを忘
Javaã®ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ã§ã®ãƒ¢ãƒ‹ã‚¿ãƒªãƒ³ã‚°ï¼ãƒˆãƒ©ãƒ–ルシューティングツール - CLOVERðŸ€
Javaアプリã§ãƒˆãƒ©ãƒ–ルãŒã‚ã£ãŸã‚Šã™ã‚‹ã¨ã€ã‚¢ãƒ—リケーションã®ãƒã‚°ãªã©ã‚’èªã‚“ã§è§£æžã‚’ã™ã‚‹ã¨æ€ã„ã¾ã™ãŒã€ãƒ‘フォーマンスやGC周りã§ã®ãƒˆãƒ©ãƒ–ルã«ã¤ã„ã¦ã¯ã€JDKã«æ¨™æº–付属ã—ã¦ã„るコマンドを使用ã™ã‚‹ã¨åŽŸå› 究明ã®æ‰‹ãŒã‹ã‚ŠãŒã¤ã‹ã‚ãŸã‚Šã™ã‚‹ã“ã¨ãŒã‚ã‚Šã¾ã™ã€‚ 自分もã€ã¡ã‚‡ã£ã¨å‰ã«ã‚„ã£ã¦ã„ãŸãƒ—ãƒã‚¸ã‚§ã‚¯ãƒˆã§ã¯ã€ã‹ãªã‚Šä½¿ã†ã“ã¨ã«ãªã‚Šã¾ã—ãŸã€‚ã©ã‚Œã‚‚有åã ã¨ã¯æ€ã„ã¾ã™ãŒã€ä½¿ã„方をメモã—ã¦ãŠãã¨ã„ã†æ„味を込ã‚ã¦æ›¸ã„ã¦ãŠãã¾ã™ã€‚ ã¾ãšã€ä»Šå›žã®ã‚µãƒ³ãƒ—ルã¨ã—ã¦ã€ä»¥ä¸‹ã®ã‚ˆã†ãªæ˜Žã‚‰ã‹ã«å•é¡Œã®ã‚るプãƒã‚°ãƒ©ãƒ を用æ„。 Monitor.java import java.util.ArrayList; import java.util.List; public class Monitor { public static void main(String[] args) { int busyThreadNum = 3; int spar
Javaトラブルã«å‚™ãˆã‚ˆã† #jjug_ccc #ccc_h2
1. ã€JJUG CCC 2014 Spring H-Ââ€2】 Javaトラブルã«å‚™ãˆã‚ˆã† 日本Javaユーザグループ 上妻 宜人 (ã‚ã’ã¤ã¾ ã®ã‚Šã¨) ã¯ã¦ãªãƒ–ãƒã‚° : n-agetsuma.hatenablog.com 2. 自己紹介 上妻 宜人 (ã‚ã’ã¤ã¾ ã®ã‚Šã¨) nï®â€¯ 電話ã®è£å´ã‚’作ã£ã¦ã„る会社ã§åƒã„ã¦ã„ã¾ã™ nï®â€¯ Java/APサーãƒã®ç¤¾å†…技術サãƒãƒ¼ãƒˆã€ãƒˆãƒ©ãƒ–ãƒ«è§£æž nï®â€¯ Blog 『見習ã„プãƒã‚°ãƒ©ãƒŸãƒ³ã‚°æ—¥è¨˜ã€ ã€JJUG CCC 2014 Spring H-Ââ€2】
JVMã®GCã®ãƒã‚°ã‚’-XX:+PrintGCDateStampsã§human readableã«ã™ã‚‹ - oinume journal
English version JVMã§GCã®ãƒã‚°å‡ºã™ã˜ã‚ƒãªã„ã§ã™ã‹ã€‚ã‚“ã§ã€ãã®æ™‚↓ã¿ãŸã„ã« -XX:+PrintGCTimeStamps ã£ã¦ã„ã†ã‚ªãƒ—ションを指定ã™ã‚‹ã˜ã‚ƒãªã„ã§ã™ã‹ã€‚ TODAY=`date "+%Y%m%d-%H%M%S"` JAVA_OPTS="-server -Xms512m -Xmx512m -Xmn256m -XX:PermSize=256m -XX:MaxPermSize=256m \ -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseParNewGC \ -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=32 -XX:TargetSurvivorRatio=85 \ -verbose:gc -Xloggc:/usr/local/tomcat/lo
JvmCasualNightã¸è¡Œã£ã¦ããŸï¼ - ã›ã¦ãƒãƒ¼ãšãƒŽãƒ¼ãƒˆ
LL言語ãªäººãŸã¡ã®å‚åŠ ãŒã»ã¨ã‚“ã©ã ã£ãŸã›ã„ã‹ã€ã‚¹ãƒ¼ãƒ„率5％未満ã¨ã„ã†ç´ 敵ãªä¼šå ´ã€‚ 多分ã€æ•°å°‘ãªã„Javaã§ã‚¢ãƒ—リ作ã£ã¦ã‚‹å´ã§ã®å‚åŠ è€…ã ã£ãŸã¨æ€ã„ã¾ã™ã€‚ SlideShareリンク ä¸è¶³åˆ†ã¯å¾Œã»ã©è¿½åŠ ã¨ã„ã†ã“ã¨ã§ãƒ»ãƒ»ãƒ»ã€‚ Norikraã®JVMãƒãƒ¥ãƒ¼ãƒ³ã§è‹¦åŠ´ã—ã¦ã„る話 from SATOSHI TAGOMORI Norikraã®JVMãƒãƒ¥ãƒ¼ãƒ³ã§è‹¦åŠ´ã—ã¦ã„る話 é‹ç”¨ã«åŠ¹ãï¼JVMã‚ªãƒ—ã‚·ãƒ§ãƒ³ä¸‰é¸ from Kazuhiro Oinuma é‹ç”¨ã«åŠ¹ãï¼JVMã‚ªãƒ—ã‚·ãƒ§ãƒ³ä¸‰é¸ Jvm operation casual talks from oranie Narut Jvm operation casual talks 感想 JVMã®è©±ã‚‚é¢ç™½ã‹ã£ãŸã®ã§ã™ãŒã€é•ã†ä¸–界を垣間見れãŸã®ãŒä¸€ç•ªã®åŽç©«ã‹ã‚‚。 JVMを使ã†ç†ç”±ã¯ã€å¿…è¦ãªãƒŸãƒ‰ãƒ«ã‚¦ã‚§ã‚¢ã‚’使用ã™ã‚‹ãŸã‚ã«JVMãŒå¿…è¦ã ã‹ã‚‰ã€‚ Luceneã€Cassandr
JVM オペコードã®ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ãƒ“ューアãŒä¾¿åˆ© - 全力ã§æ€ ã‘ãŸã„
vim-ref-jvmis 使ã„æ–¹ " Vundle ã®å ´åˆ " vimrc ã«è¿½è¨˜ï¼†å†èªè¾¼ã—㦠:BundleInstall Bundle 'ebc-2in2crc/vim-ref-jvmis' " NeoBundle ã®å ´åˆ " vimrc ã«è¿½è¨˜ï¼†å†èªè¾¼ã—㦠:NeoBundleInstall NeoBundle 'ebc-2in2crc/vim-ref-jvmis' Jvmis ã¨ã„ã†ã‚³ãƒžãƒ³ãƒ‰ãŒå‹æ‰‹ã«å®šç¾©ã•ã‚Œã‚‹ã®ã§ã€èª¿ã¹ãŸã„オペコードã®ä¸Šã«ã‚«ãƒ¼ã‚½ãƒ«ã‚’ç½®ã„㦠:Jvmis を実行ã™ã‚‹ã¨ ref.vim インタフェースã§ãƒªãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã‚’閲覧出æ¥ã¾ã™ã€‚ リファレンス㯠The Java Virtual Machine Instruction Set ã‹ã‚‰å¼•ã„ã¦æ¥ã‚‹ã®ã§ç’°å¢ƒã«ã‚ˆã£ã¦ã¯ä¸€çž¬ã‚‚ãŸã¤ãã¾ã™ãŒã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ã‚ャッシュを有効ã«ã—ã¦ã„ã‚‹ã®ã§2回目以é™ã¯ç´ æ—©ã引ãã“ã¨ãŒå‡ºæ¥ã¾ã™ *1 ã“ã‚Œ
自身ã®JVMã®ãƒ—ãƒã‚»ã‚¹IDã‚’å–å¾—ã™ã‚‹ã«ã¯ - A Memorandum
ç´°ã‹ã„ãƒã‚¿ã§ã™ã€‚ 実行ã—ã¦ã„ã‚‹ JVM ã®ãƒ—ãƒã‚»ã‚¹IDã‚’å–ã‚‹ã«ã¯ RuntimeMXBean 使ã†ã¨ç°¡å˜ã«å–ã‚Œã¾ã™ã€‚ RuntimeMXBean bean = ManagementFactory.getRuntimeMXBean(); String vmName = bean.getName(); long pid = Long.valueOf(vmName.split("@")[0]); System.out.println("VM Name : " + vmName); System.out.println("PID : " + pid); 実行çµæžœã¯ã“ã‚“ãªæ„Ÿã˜ VM Name : 9588@hostname PID : 9588 RuntimeMXBean.getName() ã¯ã€pid@hostname ã¨ã„ã†åå‰ã‚’è¿”ã™ã®ã§ã€é を抜ã出ã›ã°ãƒ—ãƒã‚»ã‚¹IDãŒå–å¾—ã§ãã¾ã™ã€‚ Sun ã®
JVM Operation Casual Talksã«å‚åŠ ã—ã¦æ€ã£ãŸã“ã¨ã‚’ã¤ã‚‰ã¤ã‚‰ã¨æ›¸ã - wyukawa's diary
JVM Operation Casual Talks : ATND 内容ã¯å‚åŠ è€…ã®ãƒ–ãƒã‚°ã‚¨ãƒ³ãƒˆãƒªã¨togetterãŒä¸‹è¨˜ã«ã‚ã‚Šã¾ã™ã®ã§ãã¡ã‚‰ã‚’見るã¨ã‚ˆã„ã¨æ€ã„ã¾ã™ã€‚ JVM Operation Casual Talksã«å‚åŠ ã—ã¾ã—㟠#jvmcasual - @johtaniã®æ—¥è¨˜ 2nd 「JVM Operation Casual Talksã€ç™ºè¡¨è³‡æ–™ã®ãƒªãƒ³ã‚¯ã‚’ã¾ã¨ã‚ã¦ã¿ã‚‹ #jvmcasual - å…ƒRX-7ä¹—ã‚Šã®é©å½“ãªæ—¥ã€… JVM Operation Casual Talks ã«å‚åŠ ã—ã¦ãã¾ã—ãŸã€‚ - susumuis Info JVM Operation Casual Talks #jvmcasual - Togetter ã§ã€ã“ã®ã‚¨ãƒ³ãƒˆãƒªã§ã¯ç™ºè¡¨ã‚’èžã„ã¦æ€ã£ãŸã“ã¨ã‚’ã¤ã‚‰ã¤ã‚‰ã¨æ›¸ãã¾ã™ã€‚ ã¡ãªã¿ã«åƒ•ã¯Javaæ´10年以上ãªã®ã§ã™ãŒã€JVMé‹ç”¨çµŒé¨“ã¯ã»ã¨ã‚“ã©ã‚ã‚Šã¾ã›ã‚“。最近ã¯ã¡ã‚‡ã£ã¨
「JVM Operation Casual Talksã€ç™ºè¡¨è³‡æ–™ã®ãƒªãƒ³ã‚¯ã‚’ã¾ã¨ã‚ã¦ã¿ã‚‹ #jvmcasual - å…ƒRX-7ä¹—ã‚Šã®é©å½“ãªæ—¥ã€…
4/7ã«ã€LINEã•ã‚“ã®ã‚ªãƒ•ã‚£ã‚¹ã§é–‹å‚¬ã•ã‚ŒãŸã€ŒJVM Operation Casual Talksã€ã€‚ 一部ã§ã€Cassandra Casualã ã£ãŸã®ã§ã¯ãªã„ã‹ã¨ã„ã†ç–‘惑もã‚ã‚Šã¾ã—ãŸãŒã€ãªã‹ãªã‹ãŸã‚ã«ãªã‚‹è©±ãŒå¤šãã¦ã€ã‚ã¨ã§ãã£ã¨è³‡æ–™ã‚’見ãŸããªã‚‹æ—¥ãŒæ¥ãã†ãªã®ã§ã€ã¡ã‚‡ã£ã¨ã¾ã¨ã‚ã¦ãŠã“ã†ã¨æ€ã†ã€‚ ã“ã¡ã‚‰ã‚‚ã‚ã‚ã›ã¦èªã¿ãŸã„ JVM Operation Casual Talks #jvmcasual - Togetter Understanding Memory Management of JavaVM
 in 15 minutes (@stanakaã•ã‚“) https://speakerdeck.com/stanaka/understanding-memory-management-of-javavm-in-15-minutes @stanakaã•ã‚“ã€ã©ã“ã§JVM使ã£ã¦ã‚‹ã®ã‹ã¨æ€ã£ãŸã‚‰ã€ä»Šæ—¥ã¯
How is the default max Java heap size determined?
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Java Platform, Standard Edition HotSpot Virtual Machine Garbage Collection Tuning Guide
見ã›ã¦ã‚„ã‚ã†JVMãŒæŒã¤çœŸã®ãƒã‚«ãƒ©ã‚’ï¼ JVMã®ã‚ªãƒ—ションを一覧ã™ã‚‹æ–¹æ³•ã«ã¤ã„ã¦ã€‚ - Qiita
Java Profiling Cheat Sheet
http://atnd.org/events/48999
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