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z($s!#?P^Ax;E#$%JPT{b%J6%yMG;>}j+NYm%kZmOtYD{C`j!bfN zP!l$h9xkU-H`3I3G%5d)JTq8J_EhTYF)0=+;_jupA*IF#zVz~~(ksKl>3&2OqXh+8 zGNDhVF>X>sjVLiuoa0iGpn2Iyg=LL+Z%Btr}P#QR)+6bvaAyK6M6sQL+51 zwBY^SYNMhntWkN93$!({&0z(4=O%Ux#}J>ucg#ZE;UAi!LN*XTEy{ zosNyRs+k2-WWO;_YGk6FgGz+Qi=^`B5$EqgT2Ta%bf;u`m>s~YQ+Mp~!GrS|6} zAL7Z<%6-q4c>as{>K66(^wvR&qeHWv!v?;?Yj{_nD8?{)@P6?qC%hOV5}0eb#=z^# znz1l99L&ymbvl{Qq1KYt4o`D*u+I+U-j->NOtzz6|2ZlnC#w%9^e8FUX}Js5k8>-f>MIcG1@O11ze4lb|)r$-S^&QzTtGUTr;LGfohTO!4p2Bja^jLgMu_ zK9lhkze~fG&$;|R?LLR1HM_%EcEnynYUf4)2?o2f@KZm)bp?y9{;-uY<~Ehiu!@1b z)VzW^R;#C-x_da>k3+NOW);Z+m|eU(pjM@*AS+`ZNORMR^ zEZ*=K`NrZMlYBp}q`rfAbOGO;mJpB6L=m18e0GEu&4beQ>$bWyyK>pw+paTa@adhB k6L&kxg#7cVC8?}K<%r)2tUqT?R&IdqT|>=^+m7M?0v-px8vp 将新对象预留在新生代,由于 Full GC 的成本远高于 Minor GC,因此尽可能将对象分配在新生代是明智的做法,实际项目中根据 GC 日志分析新生代空间大小分配是否合理,适当通过“-Xmn”命令调节新生代大小,最大限度降低新对象直接进入老年代的情况。 -另外,你还可以通过**`-XX:NewRatio=`**来设置新生代和老年代内存的比值。 +另外,你还可以通过 **`-XX:NewRatio=`** 来设置老年代与新生代内存的比值。 -比如下面的参数就是设置新生代(包括Eden和两个Survivor区)与老年代的比值为1。也就是说:新生代与老年代所占比值为1:1,新生代占整个堆栈的 1/2。 +比如下面的参数就是设置老年代与新生代内存的比值为1。也就是说老年代和新生代所占比值为1:1,新生代占整个堆栈的 1/2。 ``` -XX:NewRatio=1 @@ -141,3 +141,4 @@ JVM具有四种类型的*GC*实现: - [从实际案例聊聊Java应用的GC优化-美团技术团队](https://tech.meituan.com/2017/12/29/jvm-optimize.html) - [JVM性能调优详解](https://www.choupangxia.com/2019/11/11/interview-jvm-gc-08/) (2019-11-11) - [JVM参数使用手册](https://segmentfault.com/a/1190000010603813) +- diff --git a/docs/open-source-project/tutorial.md b/docs/open-source-project/tutorial.md index f30d834c..d2041356 100644 --- a/docs/open-source-project/tutorial.md +++ b/docs/open-source-project/tutorial.md @@ -7,8 +7,8 @@ icon: "book" ## Java - **[JavaGuide](https://github.com/Snailclimb/JavaGuide "JavaGuide")** :【Java 学习+面试指南】 一份涵盖大部分 Java 程序员所需要掌握的核心知识。 -- **[interview-guide](https://github.com/csguide-dabai/interview-guide)** :总结了后端面试八股文中的重点,希望能帮助各位准备互联网开发岗校招面试的同学。 - **[toBeBetterJavaer](https://github.com/itwanger/toBeBetterJavaer)** :一份通俗易懂、风趣幽默的 Java 学习指南,内容涵盖 Java 基础、Java 集合框架、Java 并发编程、JVM、Java 企业级开发(Git、SSM、Spring Boot)等知识点。 +- **[interview-guide](https://github.com/csguide-dabai/interview-guide)** :总结了后端面试八股文中的重点,希望能帮助各位准备互联网开发岗校招面试的同学。 - **[advanced-java](https://github.com/doocs/advanced-java "advanced-java")** :互联网 Java 工程师进阶知识完全扫盲:涵盖高并发、分布式、高可用、微服务、海量数据处理等领域知识。 - **[toBeTopJavaer](https://github.com/hollischuang/toBeTopJavaer "toBeTopJavaer")** :Java 工程师成神之路 。 - **[technology-talk](https://github.com/aalansehaiyang/technology-talk)** : 汇总 java 生态圈常用技术框架、开源中间件,系统架构、数据库、大公司架构案例、常用三方类库、项目管理、线上问题排查、个人成长、思考等知识