large objects

I have sorted out some code and optimization methods that affect performance, and hope to supplement and optimize them in the future. 1. How to use exceptionException reduces performance. To throw an exception, you must first create a new object.

1. in terms of database technology, our company is currently studying hadoop hierarchical databases, but we do not know much about them. nosql non-relational databases are popular outside, some Japanese enterprises such as Amazon and Google have

http://www.cublog.cn/u2/79570/showart_2084600.htmlClass 1: objects and memory 1.1 view objects through memory Let's first review the definition of classes and objects. Classes are blueprints or prototypes that define all instance variables and

Pg_dumpNamePg_dump -- extract a PostgreSQL database to a script file or other archive files.SynopsisPg_dump [options...] [dbname] DescriptionPg_dump is a tool that saves a PostgreSQL database to a script or archive file. the script file is in plain

Not long ago, I wrote an article about it. some Problems of the distributed cache under. Net, combined with the Implementation Mode in DNT, express some of their own views. Recently, some new experiences have been learned through learning related

In-depth understanding of how to configure MongoDB in MongoDB (1) LinuxI MongoDB Introduction   MongoDB is a high-performance, open-source, and non-pattern document-based database. It is a popular NoSql database. It can be used in many scenarios to

1. Functions in OracleFunctions can be combined, such as: Select name upper (substr (name, 2, 8 ))...1) Single Row FunctionCharacter functions, numeric functions, conversion functions, date functions, regular expression functions (10 Gb)A Conversion

1. How to use exceptionException reduces performance. To throw an exception, you must first create a new object. The constructor in the throwable interface calls the local method named fillinstacktrace. This method is responsible for the entire

Class 1: objects and memory 1.1 view objects through memory Let's first review the definition of classes and objects. Classes are blueprints or prototypes that define all instance variables and methods of the same class. objects are class

C # differences between reference types and value types We all know that the two data types of C # Are value type and reference type respectively. Many people may be able to tell with closed eyes that the value types include simple type, struct

Translation: Code Performance Adjustment Performance Tuning of code the http://www.newlc.com/performance-tuning-code application runs properly and can execute all the tasks required by the user or the customer, and does not mean that the program is

The iron chain is always hard to cut, and the object reference chain of. NET is as strong as the iron chain. If you don't pay attention to it, you will make yourProgramCarry a heavy burden on your program, and then let your program crash. Next we

Java garbage collection (2) Generational garbage collection of heap memory and java garbage collectionHeap memory generation collection Java divides the heap garbage collection into three smaller parts: the new generation, the old generation, and

1. The program should start with a note, such as time, date, purpose, author.2. Insert a space after the comma to enhance the readability of the program.3. Insert a blank line between the declaration and the execution statement to highlight the

Memory issues overview As with CPUs, memory is also an important hardware resource that directly affects the performance of the server. In general, if the server is low on memory, it causes the following two problems to occur:1. Cause the server to

I. The significance of garbage collectionIn C + +, the memory occupied by an object is occupied until the end of the program and cannot be assigned to other objects until it is explicitly released, whereas in Java the memory becomes garbage when

First, what is the JVMThe JVM is the abbreviation for Java Virtual machine (Java VM), which is a specification for computing devices, a fictional computer that is implemented by simulating various computer functions on a real computer.A very

Written in the previous wordsRecently in the work always encountered the service of the QPS in the time of the test is less than the case. So the performance optimization journey began, and the process was very tortuous. In the beginning, it was

the process by which the JVM executes the program:I. Loading A. class file Ii. managing and allocating memory Iii. performing garbage collection JRE (Java Runtime Environment) the runtime environment of the Java program containing the JVM [1] The

First, what is the JVM The JVM full name is Java Virtual machine, Java VM.All Java programs run in the Java Virtual machine and exist in memory.II. process of implementation 1. Loading: binary bytecode and loaded into the JVM2, Link: Byte code check,