large objects

Try to clarify the GC of. NET (1) 上篇文章说了一些基本概念的东西，然后还有很多东西概念没有头绪，这篇文章我试着解释Detailed steps for GC recovery algorithm?The article said that the. NET GC algorithm is the mark and Compact, but in the end how to do, I checked the information these

Concurrenthashmap Concurrent ContainerConcurrenthashmap can read data without locking, and its internal structure allows it in the write operation can keep the size of the lock as small as possible, do not have to lock the entire concurrenthashmap.

1. Java Garbage Management mechanism Object dead Judgment Method: 1 Reference counting method, 2 accessibility analysis algorithm (roots by GC to whether the class is reachable) Reference: Strong references: Common in code, generating objects with

Preface Previous articles, especially when it comes to GC, refer to a number of concepts, such as memory overflow and memory leaks, parallelism and concurrency, client mode and server mode, Minor GC and full GC, and this article explains in detail

The Java platform's garbage collection mechanism significantly improves the efficiency of developers, but a poorly implemented garbage collector can consume an application's resources too much. In the third part of the Java Virtual Machine

The Java Database Connectivity (JDBC) API is a series of interfaces that enable Java programmers to access the database, and the interfaces of each developer are not exactly the same. After years of JDBC with Oracle, I've accumulated a lot of skills

30 suggestions written in Java code (1) The first letter of the class name should be capitalized. The first letter of the field, method, and object (handle) should be lowercase. For all identifiers, all the words that are contained should be close

　　the article "What ' New in Java SE 6 Beta 2" describes the 10 things you should know about Java 6, which are summarized below1, Web Services. Priority is given to writing XML Web service client programs. You can use a simple annotaion to publish

In the UOP data cache I introduced the general principle of object caching, where the large object caching is simply The basic principle is introduced. This article describes in detail how to cache large objects. Based on the type of this column,

1 Brief introduction of-----> Garbage Collection Concept Garbage in a GC, which is an object that exists in memory and is not used again. Garbage collection is the elimination of those objects that are no longer in use, and reclaim the memory space

server| Strategy | Data at present, the management of image data is mostly based on the method of Table + entity, that is, the image data is stored in the specified computer directory in the file form, which only reflects the storage path of the

Uploading files We need to do three steps.① in the page can choose File upload;② is able to convert binary data into a byte array and then into the database, paying attention to the type of database field;③ Save the file to the

Photo excerpt from Chen Yanming 2012.5 "10 days Master Mongdb"Features of MongoDB---> Collection-oriented storage for easy storage of object-type data---> Mode freedom---> Support dynamic Query---> Support full index, including internal objects--->

Why should we use MongoDB?Characteristics: High performance, easy to deploy, easy to use, easy to store data. The main features are: For collection storage, easy to store data for object types. Mode of freedom. Supports dynamic

Why should we use MongoDB?Characteristics: High performance, easy to deploy, easy to use, easy to store data. The main features are: For collection storage, easy to store data for object types. Mode of freedom. Supports dynamic

Oracle Memory ArchitectureThe basic memory structures associated with Oracle instances include:System global Area (SGA): shared by all servers and background processes. Examples of data stored in the SGA include cached data blocks and shared SQL

1. Introduction of the article1.1 Download and install1.2 Debugger1.3 Operator Interface2. Command Chapter2.1 Breakdown by Source2.1.1 Basic commands2.1.2-dollar Command2.1.3 Extension Commands2.2 Breakdown by function2.2.1 System Information2.2.2

Usage:Pg_dump [OPTION] ... [DBNAME] DatabaseLast name, do not specify the default is the database specified by the system variable pgdatabase.General Options: (generic option)-F,--file=filename output file or directory nameFile name saved after

SummaryThis paper introduces the key technology of using VC to realize the operation method of super-long database field, and takes the database in Access2003 environment as an example, realizes under VC 6.0, and gives the key program code. 　　

0x0 relies on the default serialization/deserialization The default serialization/deserialization consumes a large amount of CPU, especially for more complex data types. It is necessary to use a more appropriate serialization/deserialization