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[Java] TL Java性能权威指南

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    发表于 2022-7-16 03:00:05 | 显示全部楼层 |阅读模式

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    第 1 章 导论 .........................................................................................................................................1
    1.1 ߁.............................................................................................................................................ຎ2
    1.2 ೝ台版本ሀ定.............................................................................................................................2
    1.3 全面的性能调优.........................................................................................................................4
    1.3.1 编写更好的算法 ............................................................................................................4
    1.3.2 编写更少的代码 ............................................................................................................4
    1.3.3 老调重弹的过早优化 ....................................................................................................5
    1.3.4 其他:数据库很可能就是瓶颈 ....................................................................................6
    1.3.5 常见的优化 ....................................................................................................................7
    1.4 ၭ঳.............................................................................................................................................8
    第 2 章 性能测试方法 .......................................................................................................................9
    2.1 原ሶ 1:֪๬ኈ实应用..............................................................................................................9
    2.1.1 微基准测试 ....................................................................................................................9
    2.1.2 宏基准测试 ..................................................................................................................13
    2.1.3 介基准测试 ..................................................................................................................15
    2.1.4 代码示例 ......................................................................................................................16
    2.2 原ሶ 2:૙解಼ت๝ୁ૙时क़、吞吐量和响应时क़............................................................19
    2.2.1 批处理流逝时间 ..........................................................................................................19
    2.2.2 吞吐量测试 ..................................................................................................................20
    2.2.3 响应时间测试 ..............................................................................................................20
    2.3 原ሶ 3:用统ऺݛ݆应对性能的Վ化....................................................................................23
    2.4 原ሶ 4:৑ራೕݏ............................................................................................................๬֪26
    vi | 目录
    2.5 ၭ঳ ...........................................................................................................................................28
    第 3 章 Java 性能调优工具箱 ......................................................................................................29
    3.1 ֡作ဣ统的工具和分析...........................................................................................................29
    3.1.1 CPU 使用率..................................................................................................................29
    3.1.2 CPU 运行队列..............................................................................................................32
    3.1.3 磁盘使用率 ..................................................................................................................33
    3.1.4 网络使用率 ..................................................................................................................34
    3.2 Java ॔੦工具...........................................................................................................................35
    3.2.1 基本的 VM 信息..........................................................................................................36
    3.2.2 线程信息 ......................................................................................................................39
    3.2.3 类信息 ..........................................................................................................................39
    3.2.4 实时 GC 分析...............................................................................................................39
    3.2.5 事后堆转储 ..................................................................................................................39
    3.3 性能分析工具...........................................................................................................................39
    3.3.1 采样分析器 ..................................................................................................................40
    3.3.2 探查分析器 ..................................................................................................................41
    3.3.3 阻塞方法和线程时间线 ..............................................................................................42
    3.3.4 本地分析器 ..................................................................................................................44
    3.4 Java 任ခ੦制...........................................................................................................................45
    3.4.1 Java 飞行记录器 ..........................................................................................................46
    3.4.2 开启 JFR.......................................................................................................................52
    3.4.3 选择 JFR 事件..............................................................................................................54
    3.5 ၭ঳...........................................................................................................................................56
    第 4 章 JIT 编译器 ...........................................................................................................................58
    4.1 JIT 编译器:߁બ.....................................................................................................................58
    4.2 调优入ோ:჋ስ编译器ૌ႙DŽClient、Server ईܾኁ同用Dž................................................61
    4.2.1 优化启动 ......................................................................................................................62
    4.2.2 优化批处理 ..................................................................................................................63
    4.2.3 优化长时间运行的应用 ..............................................................................................64
    4.3 Java 和 JIT 编译器版本 ...........................................................................................................64
    4.4 编译器中प调优.......................................................................................................................67
    4.4.1 调优代码缓存 ..............................................................................................................67
    4.4.2 编译阈值 ......................................................................................................................68
    4.4.3 检测编译过程 ..............................................................................................................70
    4.5 ߛप编译器调优.......................................................................................................................73
    4.5.1 编译线程 ......................................................................................................................73
    4.5.2 内联 ..............................................................................................................................74
    目录 | vii
    4.5.3 逃逸分析 ......................................................................................................................75
    4.6 ొ优化.......................................................................................................................................76
    4.6.1 代码被丢弃 ..................................................................................................................77
    4.6.2 逆优化僵尸代码 ..........................................................................................................78
    4.7 分֫编译प՚...........................................................................................................................79
    4.8 ၭ঳...........................................................................................................................................80
    第 5 章 垃圾收集入门 .....................................................................................................................81
    5.1 垃圾收集߁...........................................................................................................................ຎ81
    5.1.1 分代垃圾收集器 ..........................................................................................................83
    5.1.2 GC 算法........................................................................................................................84
    5.1.3 选择 GC 算法...............................................................................................................87
    5.2 GC 调优एإ............................................................................................................................ 92
    5.2.1 调整堆的大小 ..............................................................................................................92
    5.2.2 代空间的调整 ..............................................................................................................95
    5.2.3 永久代和元空间的调整 ..............................................................................................96
    5.2.4 控制并发 ......................................................................................................................97
    5.2.5 自适应调整 ..................................................................................................................98
    5.3 垃圾࣮收工具...........................................................................................................................99
    5.4 ၭ঳.........................................................................................................................................102
    第 6 章 垃圾收集算法 ...................................................................................................................103
    6.1 ૙解 Throughput 收集器........................................................................................................103
    6.2 ૙解 CMS 收集器 ..................................................................................................................109
    6.2.1 针对并发模式失效的调优 ........................................................................................113
    6.2.2 CMS 收集器的永久代调优.......................................................................................116
    6.2.3 增量式 CMS 垃圾收集..............................................................................................117
    6.3 ૙解 G1 垃圾收集器..............................................................................................................118
    6.4 ߛप调优.................................................................................................................................126
    6.4.1 晋升及 Survivor 空间 ................................................................................................126
    6.4.2 分配大对象 ................................................................................................................129
    6.4.3 AggressiveHeap 标志 ................................................................................................136
    6.4.4 全盘掌控堆空间的大小 ............................................................................................137
    6.5 ၭ঳.........................................................................................................................................138
    第 7 章 堆内存最佳实践 ..............................................................................................................140
    7.1 堆分析.....................................................................................................................................140
    7.1.1 堆直方图 ....................................................................................................................141
    7.1.2 堆转储 ........................................................................................................................142
    7.1.3 内存溢出错误 ............................................................................................................146
    viii | 目录
    7.2 ३ณ内存使用 .........................................................................................................................149
    7.2.1 减少对象大小 ............................................................................................................149
    7.2.2 延迟初始化 ................................................................................................................152
    7.2.3 不可变对象和标准化对象 ........................................................................................156
    7.2.4 字符串的保留 ............................................................................................................157
    7.3 对ၡ生ంዜ೺࠶.................................................................................................................૙160
    7.3.1 对象重用 ....................................................................................................................160
    7.3.2 弱引用、软引用与其他引用 ....................................................................................165
    7.4 ၭ঳.........................................................................................................................................175
    第 8 章 原生内存最佳实践 ..........................................................................................................176
    8.1 内存቞用.................................................................................................................................176
    8.1.1 测量内存占用 ............................................................................................................177
    8.1.2 内存占用最小化 ........................................................................................................178
    8.1.3 原生 NIO 缓冲区 .......................................................................................................178
    8.1.4 原生内存跟踪 ............................................................................................................179
    8.2 ኍ对不同֡作ဣ统优化 JVM................................................................................................182
    8.2.1 大页 ............................................................................................................................182
    8.2.2 压缩的 oop .................................................................................................................185
    8.3 ၭ঳.........................................................................................................................................187
    第 9 章 线程与同步的性能 ..........................................................................................................188
    9.1 线程׾与 ThreadPoolExecutor .............................................................................................188
    9.1.1 设置最大线程数 ........................................................................................................189
    9.1.2 设置最小线程数 ........................................................................................................192
    9.1.3 线程池任务大小 ........................................................................................................193
    9.1.4 设置 ThreadPoolExecutor 的大小 ............................................................................193
    9.2 ForkJoinPool ..........................................................................................................................195
    9.3 线程同步.................................................................................................................................201
    9.3.1 同步的代价 ................................................................................................................202
    9.3.2 避免同步 ....................................................................................................................205
    9.3.3 伪共享 ........................................................................................................................208
    9.4 JVM 线程调优........................................................................................................................211
    9.4.1 调节线程栈大小 ........................................................................................................211
    9.4.2 偏向锁 ........................................................................................................................212
    9.4.3 自旋锁 ........................................................................................................................212
    9.4.4 线程优先级 ................................................................................................................213
    9.5 ॔੦线程与໮.........................................................................................................................213
    9.5.1 查看线程 ....................................................................................................................214
    目录 | ix
    9.5.2 查看阻塞线程 ............................................................................................................214
    9.6 ၭ঳.........................................................................................................................................217
    第 10 章 Java EE 性能调优 ........................................................................................................218
    10.1 Web 容器的ए本性能 ..........................................................................................................218
    10.2 线程׾...................................................................................................................................222
    10.3 EJB ࣆࣷ Bean......................................................................................................................223
    10.3.1 调优 EJB 对象池 ....................................................................................................223
    10.3.2 调优 EJB 缓存 ........................................................................................................225
    10.3.3 本地和远程实例.....................................................................................................226
    10.4 XML 和 JSON ت............................................................................................................. ૙227
    10.4.1 数据大小.................................................................................................................227
    10.4.2 解析和编组概述.....................................................................................................229
    10.4.3 选择解析器.............................................................................................................230
    10.4.4 XML 验证...............................................................................................................235
    10.4.5 文档模型.................................................................................................................237
    10.4.6 Java 对象模型.........................................................................................................240
    10.5 对ၡႾଚ化...........................................................................................................................241
    10.5.1 transient 字段 .......................................................................................................241
    10.5.2 覆盖默认的序列化.................................................................................................241
    10.5.3 压缩序列化数据.....................................................................................................244
    10.5.4 追踪对象复制.........................................................................................................246
    10.6 Java EE 网ஏ API .................................................................................................................248
    10.7 ၭ঳.......................................................................................................................................250
    第 11 章 数据库性能的最佳实践 ...............................................................................................251
    11.1 JDBC.....................................................................................................................................251
    11.1.1 JDBC 驱动程序 ......................................................................................................252
    11.1.2 预处理语句和语句池.............................................................................................253
    11.1.3 JDBC 连接池 ..........................................................................................................255
    11.1.4 事务.........................................................................................................................256
    11.1.5 结果集的处理.........................................................................................................262
    11.2 JPA ........................................................................................................................................264
    11.2.1 事务处理.................................................................................................................264
    11.2.2 对 JPA 的写性能进行优化.....................................................................................267
    11.2.3 对 JPA 的读性能进行优化.....................................................................................268
    11.2.4 JPA 缓存..................................................................................................................271
    11.2.5 JPA 的只读实体......................................................................................................276
    11.3 ၭ঳.......................................................................................................................................277
    x | 目录
    第 12 章 Java SE API 技巧 ........................................................................................................278
    12.1 ؋࣐๕ I/O.............................................................................................................................278
    12.2 ૌेሜ...................................................................................................................................280
    12.3 ໜऐ数...................................................................................................................................284
    12.4 Java 原生থ੨.......................................................................................................................285
    12.5 ᅴ׉.......................................................................................................................................287
    12.6 字زޙ的性能.......................................................................................................................290
    12.7 නኾ.......................................................................................................................................291
    12.8 Java 集合ૌ API ...................................................................................................................292
    12.8.1 同步还是非同步.....................................................................................................293
    12.8.2 设定集合的大小.....................................................................................................294
    12.8.3 集合与内存使用效率.............................................................................................295
    12.9 AggressiveOpts Քኾ ...........................................................................................................296
    12.9.1 替代实现.................................................................................................................296
    12.9.2 其他标志.................................................................................................................297
    12.10 Lambda ՗ٳ๕和ైఁૌ...................................................................................................297
    12.11 ୁ和ࡗ୳器的性能.............................................................................................................300
    12.12 ၭ঳.....................................................................................................................................302
    附录 A 性能调优标志摘要 ...........................................................................................................303
    作者简介 ..............................................................................................................................................312
    关于封面 ..............................................................................................................................................312


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