java performance definitive guide

ArticleDirectory Efficiency Transmission Performance Today, I downloaded an electronic version of MongoDB the definitive guide and browsed the content in it, which is quite rich. Is a supplement to the practical application of the official website documentation. Similar to the official document, the internal principles of MongoDB are rarely

After Oracle acquired Stellent, it packaged the original Stellent Content Management system into Oracle Universal Content Management. However, most of the UCM product documentation and vendor training courses are about how to use the system. This Definitive Guide to Stellent Content Server Development is still required for deep-seated issues such as how to develop components. This book is at least fully usa

techniques to manage very big C + + software projects. Certainly a good read, if it is only is up to date. It was written long before c++98, and misses on many features (e.g. namespaces) important for large scale projects. If you need-to-work in a big C + + software project, you might want to read it, although-need-take-more than a grain of salt with it. The first volume of a new edition is expected in 2015. Inside the C + + Object Model (Stanley Lippman) If you want to know how virtual membe

is up to date. It was written long before c++98, and misses on many features (e.g. namespaces) important for large scale projects. If you need-to-work in a big C + + software project, you might want to read it, although-need-take-more than a grain of salt with it. The first volume of a new edition is expected in 2015. Inside the C + + Object Model (Stanley Lippman) If you want to know how virtual member functions is commonly implemented and how base objects is commonly laid out in me Mory in

Today downloaded the "MongoDB The Definitive Guide" electronic version, browsing the content inside, or quite rich. is a supplement to the actual application of official website documents. Similar to the official documentation, the introduction of MongoDB's internal principles is minimal, and only a section of the appendix describes the relevant content.MongoDB is like a big black box for most mongodb users

either by the drivers or By a user ' s application code). Maintaining this streamlined (streamlined; improved) design is one of the reasons MongoDB can achieve such high performance.Simple administrationMongoDB tries to simplify database administration by making servers administrate themselves as much as possible. Aside from starting the database server, very little administration is necessary. If a master server goes down, MongoDB can automatically failover (fail-over redundancy) to a backup s

lightweight processes in the running queueUS: User-State CPU utilizationSY: System State CPU usageID:CPU Idle Rate2. Toptop-09:42:04 up 3 days, 3 min, 1 user, load average:0.00, 0.01, 0.05tasks:108 Total, 3 running, sleeping, 0 Stopped, 0 zombie%cpu (s): 0.0 us, 0.0 sy, 0.0 ni,100.0 ID, 0.0 wa, 0.0 hi, 0.0 si, 0.0 stkib mem:1015472 Total , 104568 free, 84224 used, 826680 Buff/cachekib swap:0 Total, 0 free, 0 used.

settings-xx:parallelgcthreads=n: Sets the number of CPUs used when the parallel collector is collected. Parallel collection//thread count.-xx:maxgcpausemillis=n: Set maximum pause time for parallel collection-xx:gctimeratio=n: Sets the percentage of time that garbage collection takes to run the program. Formula 1/(1+N)Concurrent collector Settings-xx:+cmsincrementalmode: Set to incremental mode. Suitable for single CPU situations (rarely used, deprecated in jdk1.8).-xx:parallelgcthreads=n: Sets

The author of this book is a leader in Java performance and Java HotSpot virtual machines, helping you to use modern soft practices to improve your practical life by summarizing energy, avoiding common mistakes, and tips and tricks.Using G1 to overcome the limitations of parallel, serial, and CMS garbage collectors learn about the various stages of G1 GC collecti

be adjusted to improve the performance of the job immediately. We need to perform a comprehensive analysis of the spark job based on different business scenarios and data conditions, and then adjust and optimize it in many ways to get the best performance.Based on the previous experience of spark job development and the accumulation of practice, the author summarizes a set of performance optimization schem

JNI/NDK Development Guide (9) -- JNI call Performance Test and optimization, jnindk Reprinted please indicate the source: http://blog.csdn.net/xyang81/article/details/44279725 In the previous chapters, we learned to declare an native method in Java, then generate a prototype Declaration of the Local interface function, and then use C/C ++ to implement these func

, system, idle, iowait, IRQ, SOFTIRQ, Stealstolen, guest);b) Each process snapshot is a 4-tuple (Utime, stime, Cutime, cstime);2. According to conclusion 1, conclusion 2 calculates the total CPU time and process CPU time of two time, respectively: TotalCpuTime1, TotalCpuTime2, processCpuTime1, processCpuTime23. Calculates the CPU utilization of the process PCPU = 100* (processcputime2–processcputime1)/(TOTALCPUTIME2–TOTALCPUTIME1) (calculated by 100%, If it is multi-core, multiply the number of

execution time of full GC. The goal is to minor GC time within 100MS and full gc time within 1s. Main tuning Parameters:Set the heap memory size, which is the most basic. -XMS: Heap memory space When the JVM is started. -XMX: Maximum heap memory limit. Sets the Cenozoic size.The new generation should not be too small, otherwise there will be a large number of objects pouring into the old age. -xx:newratio: The proportion of the new generation and the old age.

This series is a reading note for the Java Performance:the Definitive guide. OverviewIn the current JVM, there are mainly 4 garbage collector (garbage Collector): Serial recycler (Serial Collector), primarily for single-core computers Throughput (parallel) collector (Throughput/parallel Collector) Concurrency collector (concurrent/cms Collector)

http://java.sun.com/learning to get information. Of course you have to pay about 30 dollars for each agenda, or you can spend 1,500 dollars to get information about the whole meeting. Students enjoy a 40% discount. Resources For more information on the changes to the Merlin version, see the new features and enhanced overview documentation that comes with the developer suite. For more information about security and the Java platfo

pieces of weapon for performance analysis: Profile Analyzer, Code Analyzer, Pipeline Analyzer, Counter Analyzer, Trace Analyzer, call Tree Analyzer. Each tool can be used to analyze a specific category of performance data. If you want to learn more about VPA, you can refer to the VPA User's Guide. The two tools in VPA: Profile Analyzer and CallTree Analyzer pr

to improve your programming skills, of course, the use of debuggers, profilers, heap dump analyzers and other tools, you can maximize the program to avoid memory leak problems. 2. The Java.lang.OutOfMemoryError:GC overhead limit Exceededjava Runtime Environment (JRE) contains a built-in garbage collection process, and in many other programming languages, developers need to manually allocate and free memory. Java applications require only the develope

First, IntroductionConnected to an "Android combat"----based on retrofit implementation of multi-image/file, text upload has said very much want to understand why retrofit so dick. Recently also read some of its source code analysis of the article and personally view the source code, found that the Java Network Programming and HTTP authoritative guidelines have a good interpretation. All along, have embraced a principle, in this new technology in the

Java log Ultimate Guide Java log Basics Java uses a custom and scalable method to output logs. Although Java provides a set of basic log processing APIs through the java. util. logging package, you can easily use one or more

noted, we will limit the discussion to 32-bit Java. Stay tuned for an article on 64-bit Java that will be available soon in ESDD.Fix the problem before tuningIf you encounter issues such as crashes, memory leaks, or application hangs, you are not ready to optimize your work. This includes situations where you have disabled some or all of the Just-in-time (JIT) compilers. If a java_compiler or jitc_compileo