Java性能权威指南 英文PDF|Epub|txt|kindle电子书版本网盘下载

Java性能权威指南 英文PDF格式电子书版下载

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1．Introduction1

A Brief Outline2

Platforms and Conventions2

JVM Tuning Flags4

The Complete Performance Story5

Write Better Algorithms5

Write Less Code6

Oh Go Ahead,Prematurely Optimize7

Look Elsewhere:The Database Is Always the Bottleneck8

Optimize for the Common Case9

Summary10

2．An Approach to Performance Testing11

Test a Real Application11

Microbenchmarks11

Macrobenchmarks16

Mesobenchmarks18

Common Code Examples20

Understand Throughput,Batching,and Response Time24

Elapsed Time(Batch) Measurements24

Throughput Measurements25

Response Time Tests26

Understand Variability29

Test Early,Test Often33

Summary36

3．A Java Performance Toolbox37

Operating System Tools and Analysis37

CPU Usage38

The CPU Run Queue41

Disk Usage43

Network Usage44

Java Monitoring Tools46

Basic VM Information47

Thread Information50

Class Information51

Live GC Analysis51

Heap Dump Postprocessing51

Profiling Tools51

Sampling Profilers52

Instrumented Profilers54

Blocking Methods and Thread Timelines55

Native Profilers57

Java Mission Control59

Java Flight Recorder60

Enabling JFR66

Selecting JFR Events70

Summary72

4．Working with the JIT Compiler73

Just-in-Time Compilers:An Overview73

Hot Spot Compilation75

Basic Tunings:Client or Server(or Both)77

Optimizing Startup78

Optimizing Batch Operations80

Optimizing Long-Running Applications81

Java and JIT Compiler Versions81

Intermediate Tunings for the Compiler85

Tuning the Code Cache85

Compilation Thresholds87

Inspecting the Compilation Process90

Advanced Compiler Tunings94

Compilation Threads94

Inlining96

Escape Analysis97

Deoptimization98

Not Entrant Code98

Deoptimizing Zombie Code101

Tiered Compilation Levels101

Summary103

5．An Introduction to Garbage Collection105

Garbage Collection Overview105

Generational Garbage Collectors107

GC Algorithms109

Choosing a GC Algorithm113

Basic GC Tuning119

Sizing the Heap119

Sizing the Generations122

Sizing Permgen and Metaspace124

Controlling Parallelism126

Adaptive Sizing127

GC Tools128

Summary131

6．Garbage Collection Algorithms133

Understanding the Throughput Collector133

Adaptive and Static Heap Size Tuning136

Understanding the CMS Collector140

Tuning to Solve Concurrent Mode Failures145

Tuning CMS for Permgen148

Incremental CMS149

Understanding the G1 Collector150

Tuning G1157

Advanced Tunings159

Tenuring and Survivor Spaces159

Allocating Large Objects163

AggressiveHeap171

Full Control Over Heap Size173

Summary174

7．Heap Memory Best Practices177

Heap Analysis177

Heap Histograms178

Heap Dumps179

Out of Memory Errors184

Using Less Memory188

Reducing Object Size188

Lazy Initialization191

Immutable and Canonical Objects196

String Interning198

Object Lifecycle Management202

Object Reuse202

Weak,Soft,and Other References208

Summary221

8．Native Memory Best Practices223

Footprint223

Measuring Footprint224

Minimizing Footprint225

Native NIO Buffers226

Native Memory Tracking227

JVM Tunings for the Operating System230

Large Pages230

Compressed oops234

Summary236

9．Threading and Synchronization Performance237

Thread Pools and ThreadPoolExecutors237

Setting the Maximum Number of Threads238

Setting the Minimum Number of Threads242

Thread Pool Task Sizes243

Sizing a ThreadPoolExecutor244

The ForkJoinPool246

Automatic Parallelization252

Thread Synchronization254

Costs of Synchronization254

Avoiding Synchronization259

False Sharing262

JVM Thread Tunings267

Tuning Thread Stack Sizes267

Biased Locking268

Lock Spinning268

Thread Priorities269

Monitoring Threads and Locks270

Thread Visibility270

Blocked Thread Visibility271

Summary275

10．Java Enterprise Edition Performance277

Basic Web Container Performance277

HTTP Session State280

Thread Pools283

Enterprise Java Session Beans283

Tuning EJB Pools283

Tuning EJB Caches286

Local and Remote Instances288

XML and JSON Processing289

Data Size290

An Overview of Parsing and Marshalling291

Choosing a Parser293

XML Validation299

Document Models302

Java Object Models305

Object Serialization307

Transient Fields307

Overriding Default Serialization307

Compressing Serialized Data311

Keeping Track of Duplicate Objects313

Java EE Networking APIs316

Sizing Data Transfers316

Summary319

11．Database Performance Best Practices321

JDBC322

JDBC Drivers322

Prepared Statements and Statement Pooling324

JDBC Connection Pools326

Transactions327

Result Set Processing335

JPA337

Transaction Handling337

Optimizing JPA Writes340

Optimizing JPA Reads342

JPA Caching346

JPA Read-Only Entities352

Summary353

12．Java SE API Tips355

Buffered I/O355

Classloading358

Random Numbers362

Java Native Interface364

Exceptions366

String Performance370

Logging371

Java Collections API373

Synchronized Versus Unsynchronized373

Collection Sizing375

Collections and Memory Efficiency376

AggressiveOpts378

Alternate Implementations378

Miscellaneous Flags379

Lambdas and Anonymous Classes379

Lambda and Anonymous Classloading381

Stream and Filter Performance382

Lazy Traversal383

Summary385

A．Summary of Tuning Flags387

Index397