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JVMã®ãƒ’ープサイズã¨ã‚³ãƒ³ãƒ†ãƒŠæ™‚代ã®ãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° | Folioscope
最近 JVM ã®ãƒ’ãƒ¼ãƒ—é ˜åŸŸã¨ãƒ‘ラメータã€ãã—ã¦ã‚³ãƒ³ãƒ†ãƒŠã®é–¢ä¿‚ã«ã¤ã„ã¦èª¿ã¹ã¦ã¾ã—ãŸã€‚ 案外ã¾ã¨ã¾ã£ãŸæƒ…å ±ãŒå°‘ãªã‹ã£ãŸã®ã§ç°¡å˜ã«ã¾ã¨ã‚ã¾ã—ãŸã€‚ Java ã®ãƒ’ープサイズをè¨å®š ã¾ãšã¯ Java ã®ãƒ’ープサイズã«ã¤ã„ã¦ç°¡å˜ãªãŠã•ã‚‰ã„ã§ã™ã€‚ 本番環境㧠Java アプリケーションをé‹ç”¨ã™ã‚‹ä¸Šã§ã€JVM ã®ãƒ’ープサイズを決定ã™ã‚‹ã®ã¯éžå¸¸ã«å¤§äº‹ãªãƒã‚¤ãƒ³ãƒˆã§ã™ã€‚ ãƒ’ãƒ¼ãƒ—é ˜åŸŸã®æœ€å¤§ã‚µã‚¤ã‚ºã‚’大ããã™ã‚Œã°ã‚¬ãƒ™ãƒ¼ã‚¸ã‚³ãƒ¬ã‚¯ã‚·ãƒ§ãƒ³ (GC) ã®å›žæ•°ã¯æ¸›ã‚‰ã™ã“ã¨ãŒã§ãã¾ã™ãŒã€ å¿…è¦ä»¥ä¸Šã«å¤§ããã—ã™ãŽã‚‹ã¨ç„¡é§„ã«ãƒªã‚½ãƒ¼ã‚¹ã‚’消費ã—ãŸã‚Šã€OOM killer 㧠OS ã«ãƒ—ãƒã‚»ã‚¹ã‚’終了ã•ã›ã‚‰ã‚Œã¾ã™ã€‚ JVM ãŒä½¿ç”¨ã§ãるヒープサイズã¯ã€Java API ã® Runtime.getRuntime().maxMemory() ã§ç¢ºèªã§ãã¾ã™ã€‚ ã¾ãŸ java ã®èµ·å‹•ã‚ªãƒ—ション㫠-XX:+PrintFlagsFinal オプショ
JVM入門 -メモリ管ç†ç·¨-
関ジャãƒ'19 7月度 - connpass https://kanjava.connpass.com/event/134133/ 登壇資料
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実践クリーンアーã‚テクãƒãƒ£ with Java
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Java ライブラリ Apache PDFBox 㧠PDF ã‚’æ“作ã—よㆠ(第１回:概è¦ã¨ç°¡å˜ãªæ“作) |
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The JVM on Fire - Using Flame Graphs to Analyse Performance
Currently there are several tools available to analyse your application performance and show the results. Traditionally these results are either shown in some kind of table form, either flat or as a tree view. Flame graphs are relatively new and take a new angle to show the results. Furthermore, flame graphs can be generated on various levels; tooling hooking into the JVM, but also on (Linux / Mac
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Iciql
iciql is… a model-based, database access wrapper for JDBC for modest database schemas and basic statement generation for those who want to write code, instead of SQL, using IDE completion and compile-time type-safety small (<250KB) with debug symbols and no runtime dependencies pronounced icicle (although it could be French: ici ql - here query language) a friendly fork of the H2 JaQu subproject i
Which Persistence Specification ?
There are several competing persistence technologies available for Java. Two of these are "standardised" (via the JCP). When developing your application you need to choose the most appropriate technology for your needs. Java Data Objects (JDO) has been a standard since 2001 with the release of JDO1. It was improved with the release of JDO2. Just to confuse issues the Java Persistence API (JPA) was
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FlameViewer - Plugins | JetBrains
Google Code Archive - Long-term storage for Google Code Project Hosting.
Comparing Querydsl, jOOQ, JEQUEL, activejdbc, iciql and other query DSLs
GitHub - lukaszlenart/resteasy-demo: Simple RESTeasy demo application with service, web and client module
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