Basic GC Tuning

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Sizing the Heap -XmsN -XmxN Summary The JVM will attempt to find a reasonable minimum and maximum heap size based on the machine it is running on. Unless the application needs a larger heap than the default, consider tuning the performance goals of a…

GC和GC Tuning

GC和GC Tuning GC的基础知识什么是垃圾 C语言申请内存:malloc free C++: new delete c/C++ 手动回收内存 Java: new ? 自动内存回收,编程上简单,系统不容易出错,手动释放内存,容易出两种类型的问题: 忘记回收多次回收没有任何引用指向的一个对象或者多个对象(循环引用) 如何定位垃圾引用计数(ReferenceCount) 根可达算法(RootSearching) 常见的垃圾回收算法标记清除(mark sweep) - 位置不连续产生…

提交并发量的方法：Java GC tuning ：Garbage collector

三色算法,高效率垃圾回收,jvm调优 Garbage collector:垃圾回收器 What garbage? 没有任何引用指向它的对象 JVM GC回收算法: 引用计数法(ReferenceCounting) 给对象中添加一个引用计数器,每当有一个地方引用他时,计数器值就+1,:当引用失效时,计数器值就-1:任何时刻计数器为0的对象就是不可能在被使优点:判定效率高缺点:不会完全准确,因为如果出现两个对象相互引用的问题就不行了很明显,到最后两个实例都不再用了(都等于null了),但是GC…

Java 8 VM GC Tuning Guide Charter2

第二章 Ergonomics Ergonomics is the process by which the Java Virtual Machine (JVM) and garbage collection tuning, such as behavior-based tuning, improve application performance. The JVM provides platform-dependent default selections for the garbage col…

Java 8 VM GC Tuning Guide Charter3-4

第三章 Generations One strength of the Java SE platform is that it shields the developer from the complexity of memory allocation and garbage collection. However, when garbage collection is the principal bottleneck, it is useful to understand some aspec…

Understanding CMS GC Logs--转载

原文地址:https://blogs.oracle.com/poonam/entry/understanding_cms_gc_logs Understanding CMS GC Logs By Poonam-Oracle on Mar 23, 2006 CMS GC with -XX:+PrintGCDetails and -XX:+PrintGCTimeStamps prints a lot of information. Understanding this information can…

【Basic GC Tuning】的更多相关文章

Basic GC Tuning

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Java 8 VM GC Tuning Guide Charter3-4

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