shared memory segment

First, the installation of APCDownload http://pecl.php.net/get/APC-3.1.9.tgz The compilation parameters are as follows: Copy Code code as follows: ./configure--ENABLE-APC--enable-apc-spinlocks--disable-apc-pthreadmutex The

What does the dest in IPCS mean? Linux server, I use the command IPCS to see the following data Key shmid owner perms bytes nattch Status ox00 3501612 Root 10734227 384 dest ox00 3501613 Apache 666 10000 0 Note: The second data above is the shared

The Informix Dynamic server employs a multiple-threaded architecture, which means that a process can accomplish multiple tasks at the same time using multiple threads of its own, so that the entire system requires fewer processes to complete the

Typically,the ORACLE_SID environment variable is the full name of the ORACLE System Identifier, which is used to identify different instances on a single server, by default the instance name is Oracle_ The value of the SID (that is, Instance_name=

1. Installation environment ... 42. Installation steps ... 52.1. Check the hardware environment ... 52.2. Check the SOFTWARE Environment ... 53. Installation Standard ... 73.1. Kernel parameters ... 73.2. Set up System user groups, configure user

The so-called shared memory is the fastest available IPC form that allows multiple processes to access the same piece of memory space. is designed for inefficient operation of other communication mechanisms. It is often used in conjunction with

Shared memory Basic ConceptsThe shared memory area is the fastest IPC form . Once such memory is mapped to the address space of the process that shares it, these inter-process data transfers no longer involve the kernel, in other words, the process

Note: Most of the articles in this classification from the "Deep analysis of the Linux kernel source code" a book, and other reference information such as "Complete analysis of the Linux kernel", "Linux C programming One-stop learning", and so on,

Shared Memory API #include #include int shmget (key_t key, size_t size, int shmflg), void *shmat (int shmid , const void *shmaddr, int shmflg), int shmdt (const void *shmaddr), int shmctl (int shmid, int cmd, struct shmid_ds *buf);System V

Apache 　　Article Introduction: The latest official Chinese version of Apache profile. Help the Web server administrator to configure Apache more conveniently. # # Based upon the NCSA server configuration files originally by Rob

Shmall and Shmmax parameters of the kernelThe shmmax= is configured with the largest memory segment size------> This setting is much better than sga_max_size.Shmmin= the smallest amount of memory segmentShmmni= the total number of memory segment for

Part II: Process Managementprocess : A process can be seen as a program being executed. The process requires a certain amount of resources to complete the even more task.A process is a unit of work in most systems. Such a system has a set of

First, the basic situation Introduction: CPU:P4 2.0GMemory: 1000MHard drive: 40GB Operating system: Radhat9 (Linux Kernel 2.4.20-8) Second, the preparatory work: Acquisition of 1.Oracle 9i Oracle920_for_linux is me in

Have always wanted to summarize the knowledge of Oracle memory tuning, recently optimized a database memory parameters, look for some information and Google a lot. Now write it down and do the backup. First, overview: Oracle memory can be divided

L Preface The management of Oracle memory, up to 9ir2, is a very important aspect, mismanagement, will likely cause serious performance problems to the database. We'll take a step-by-step approach to all aspects of memory management. L Overview

Managing the operating mode of informix-online dynamic servers 1. Online mode of operation Off-line (offline mode) quiescent (static mode) On_line (Online mode) Shutdown (off mode) Recovery (Recovery mode) Online system has the following

First, the normal way to install a new 1. Oracle Installation Environment ReadyUse OEL5.8 x64 installation, installation process, choose Anti-Custom selected GUI, development package, development library, old software development package, etc., must

The so-called shared memory is the fastest available IPC form that allows multiple processes to access the same piece of memory space. is designed for inefficient operation of other communication mechanisms. It is often used in conjunction with

1. What is SGA (refer to Oracle memory structure-SGA) SGA is a group of shared memory structures allocated to the system, which can contain data or control information of a database instance. If multiple users connect to the same database instance,

This article mainly introduces two sets of PHPAPC configuration files and detailed descriptions of parameters. For more information, see 1. install APCDownload http://pecl.php.net/get/APC-3.1.9.tgz The compilation parameters are as follows: The