架构师训练营第 9 周总结
Java虚拟机原理
![](https://static001.geekbang.org/infoq/bc/bc87b80f1f9f14dca1964981c46265ea.png)
字节码执行流程
![](https://static001.geekbang.org/infoq/74/746ff5ca4f5b4112f564c678a0b53d0b.png)
Java字节码文件编译过程
![](https://static001.geekbang.org/infoq/42/426e3edec57c1c62c4b8b8b4c41a9ad1.png)
类加载器的双亲委托模型
![](https://static001.geekbang.org/infoq/b9/b972d1686e24fc70cd1532baa60ac4bc.png)
自定义类加载器:
使用场景:
1.隔离加载类:同一个JVM中不同组件加载同一个类的不同版本。
2.扩展加载源:从网络、数据库等处加载字节码。
3.字节码加密:加载自定义的加密字节码,在ClassLoader中解密。
![](https://static001.geekbang.org/infoq/d3/d335dedc3982b1df389c31da40858652.png)
堆&栈
堆:每个JVM实例中有一个堆。
栈:每个线程有一个栈。
方法区:
![](https://static001.geekbang.org/infoq/0e/0e78d05870c08a023d5642b60787493a.png)
java线程栈:
![](https://static001.geekbang.org/infoq/6b/6ba2c01c3535ba32b7e25950201c15e0.png)
线程工作内存 & volatile
![](https://static001.geekbang.org/infoq/d2/d29d81b518eb7312dbff598321472a67.png)
Java运行环境
![](https://static001.geekbang.org/infoq/af/af8f4f92963a47bec10759d8e70f7e22.png)
JVM垃圾回收
Java启动参数
JVM性能诊断工具
基本工具:JPS,JSTAT,JMAP,JSTACK
集成工具:JConsole,JVisualVM
![](https://static001.geekbang.org/infoq/f8/f84f3868d8288c21bf4f7f884067e77a.png)
![](https://static001.geekbang.org/infoq/5a/5acde9483c0548197dc01c2a17dfb505.png)
![](https://static001.geekbang.org/infoq/f3/f339a1517ce08943566d2770f5109d96.png)
![](https://static001.geekbang.org/infoq/49/49711a78a4fb7e351299262c8b8cc1a8.png)
![](https://static001.geekbang.org/infoq/5d/5d30852b59b20e7a71c0e91e07844c82.png)
![](https://static001.geekbang.org/infoq/26/26c5143ffc9b8bf95df658c016b6e0b2.png)
![](https://static001.geekbang.org/infoq/bc/bc5659b53d1057044a8f1f8893e3bf5a.png)
Java代码优化
![](https://static001.geekbang.org/infoq/b3/b3c11a9d215d3af87b01a520ff6a83f8.png)
![](https://static001.geekbang.org/infoq/b7/b7d01881d4c2cc016e613fc2afe043f4.png)
![](https://static001.geekbang.org/infoq/3a/3a3f60b0c16dce9e06ba4b924d367880.png)
![](https://static001.geekbang.org/infoq/24/24784c4b006e96c1ac4f63e864b8f608.png)
![](https://static001.geekbang.org/infoq/b0/b080adb818d74b1e37346f61dc6e6b04.png)
![](https://static001.geekbang.org/infoq/01/01e6d85080c809f9a6953ee73960aeaf.png)
![](https://static001.geekbang.org/infoq/44/44e9d5656bfc1007e38c60bb8edb2fbf.png)
![](https://static001.geekbang.org/infoq/aa/aaa08a62131707e647d3a57d942e0dc4.png)
![](https://static001.geekbang.org/infoq/17/1720f04fa3f16e83ca6d48518f06f6dd.png)
![](https://static001.geekbang.org/infoq/4b/4bc42f2a64159fc60fdccd9ae18c656e.png)
![](https://static001.geekbang.org/infoq/d6/d6484d5978b8fe09609f1a4304a21478.png)
![](https://static001.geekbang.org/infoq/1a/1ac807659181b9850e8b71519bd62c1c.png)
![](https://static001.geekbang.org/infoq/ca/ca654ae1bb6ec1fe8b97fe1c92450c39.png)
秒杀
使用新系统
设计原则:
![](https://static001.geekbang.org/infoq/f7/f7fc5c93bd6e208e38e8a1f6e87b5685.png)
![](https://static001.geekbang.org/infoq/ca/cad8fcf9655db442980dce70ed89a0a7.png)
![](https://static001.geekbang.org/infoq/68/689ca169a4347b67819b967f87877c75.png)
![](https://static001.geekbang.org/infoq/bb/bb4aec7ee293fa8b54ecd5082f77368d.png)
![](https://static001.geekbang.org/infoq/25/25400899adeb6a7e9c86a07a7c231254.png)
![](https://static001.geekbang.org/infoq/27/273914690216ff9ed395221711e7d5f1.png)
![](https://static001.geekbang.org/infoq/76/76004c8403477295360844c3bc2061af.png)
![](https://static001.geekbang.org/infoq/8b/8b8c0cba231f2f6819617654e91d0abe.png)
![](https://static001.geekbang.org/infoq/d2/d23691735591bb5bfa2afc6b205b51fc.png)
![](https://static001.geekbang.org/infoq/50/50e2868a814819689ec76461da70b51b.png)
![](https://static001.geekbang.org/infoq/50/506f5ae57743fe99ba83f5037cabc36e.png)
![](https://static001.geekbang.org/infoq/7d/7d92d36d07c8a54e09aa42a4d2fd94ae.png)
![](https://static001.geekbang.org/infoq/f1/f1f1a22b37abe7ffa9ab56dfb3366289.png)
![](https://static001.geekbang.org/infoq/61/61c1e8e2a9f03be5f91d4b81cf417744.png)
![](https://static001.geekbang.org/infoq/c2/c219eb493f6ff321a15c7e11fcc7c939.png)
![](https://static001.geekbang.org/infoq/51/51b39d84849c7f31b4a8dd3739062e9b.png)
![](https://static001.geekbang.org/infoq/a7/a7fad0e092ec5ba136d54a9350f2effd.png)
![](https://static001.geekbang.org/infoq/af/af739cb8caa958bff823f00bd27b0c5a.png)
![](https://static001.geekbang.org/infoq/a8/a809bd705667cdcb9caf8eb99ab5b3f6.png)
![](https://static001.geekbang.org/infoq/c5/c574afc77b8c417a7e538c587ae690f4.png)
![](https://static001.geekbang.org/infoq/2f/2f2ac123af3df970588119c99e7381f4.png)
宅米网性能优化实践:
架构优化:
编辑
删除
![](https://static001.geekbang.org/infoq/ac/ac0d88275114167847e2a2e724b6b9e6.png)
其他优化:
H5响应压缩优化
SQL语句与索引优化
数据库连接池优化
缓存使用优化
订单数据冷热分离
系统性能监控与测试
发现问题、优化解决、监控测试形成闭环,持续优化
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