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在Java虚拟机（JVM）的垃圾回收机制中，分代收集算法是一种常用的优化方式。本文将深入探讨分代收集算法的原理、优势以及在Java开发中的应用。 1. 背景随着Java应用程序的不断发展，垃圾回收成为了重要的性能优化和资源管理手段。传统的垃圾回收算法存在效率低下、停顿时间长等问题，而分代收集算法应...

JVM第三讲：深入理解java虚拟机之垃圾回收算法？CMS垃圾回收的基本流程？对象引用类型？

思考三个问题：1、哪些内存需要回收？2、什么时候回收？3、如何回收？讲讲你对垃圾回收机制的理解(问题问的很宽泛，就看你怎么回答和理解)什么是垃圾，为什么要回收，不回收有什么问题，jvm有哪些区域，分别采用哪些回收方案，每个方案有哪些优缺点，为什...

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「月光宝盒」JVM研究系列「技术总结笔记」Java虚拟机垃圾回收认知和调优的"思南（司南）"【下部】

并行收集器并行收集器（也称为吞吐量收集器）是类似于串行收集器的分代收集器。串行和并行收集器之间的主要区别是，并行收集器有多个线程，用于加速垃圾回收。通过命令行选项 -XX:+UseParallelGC 启用并行收集器。默认情况下，使用此选项，次要(minor)和主要(Major GC)都将并行运...

「月光宝盒」JVM研究系列「技术总结笔记」Java虚拟机垃圾回收认知和调优的"思南（司南）"【上部】

优化目标与策略(Ergonomics)垃圾回收器、堆和运行时编译器默认选择G1(Garbage First)收集器GC线程的最大值受限于堆大小和可用的CPU资源初始堆空间（Xms）为物理内存的1/64最大堆空间（Xmx）为物理内存的1/4分层编译器，同时使用C1和C2可以将 Java HotSpot...

JVM笔记 | Java垃圾回收（GC）

概述在JVM的运行时数据区中，程序计数器、JVM栈和本地方法栈随线程而生，随线程而灭，内存分配和回收具备确定性，因此这几个区域不需要过多考虑内存回收问题，因为方法结束或者线程结束时，内存自然就跟随着回收了。而Java堆和方法区则不一样，一个接口中的多个实现类需要的内存可能不一样，一个方法中的多个分...

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