shared memory segment

Set the kernel parameters of shared memory in Linux. in Linux, shared memory involves three kernel parameters: SHMMAX, SHMMNI, and SHMALL. besides the default value, we can also make temporary or permanent changes to the environment and application

This article describes some kernel parameters that need to be set to run Oracle databases on SunSolaris. Sharedmemory: (shared memory segments) This article describes some kernel parameters required to run Oracle databases on Sun Solaris. Some

Note: Que1: In general, the kernel parameters (gedit/etc/sysctl. conf), we only need to modify the kernel. shmmax.1 is half of the physical memory: physical memory grepMemTotal/proc/meminfo & Note: Que1: Generally, When configuring kernel parameters

Today, I want to learn how to install PostgreSQL8.4 in Ubuntu9.10. After executing the following command, linuxidc @ pentest :~ $ The sudoapt-getinstallpostgresql-8.4postgresql-client-8.4postgresql-contrib-8.4 returns the following:

Installing Oracle10.2.0.1 on OracleLinux6.1 is a tortuous process during software installation. When dbca creates an instance, it encounters: Installing Oracle 10.2.0.1 on Oracle Linux 6.1 is a tortuous process when installing software. When dbca

Ask questions about memory sharing !!! The code is as follows: & lt ;? Php $ sysid & nbsp; $ shmkey & nbsp; ftok (_ FILE __, & nbsp; t); $ flags & nbsp; c; $ mode & nbsp; 0766; $ size & nbsp; 1024; $ shmid & nbsp; s ask questions about memory

The code is as follows: This piece of code error, what is the matter? PHP Warning: shmop_read (): No shared memory segment with an ID of [1946257823] in/home/admin/codes/php/shmop/client.p HP on Line 8warning:shmop_read (): No shared

I. Installation of APCDownload http://pecl.php.net/get/APC-3.1.9.tgz The compilation parameters are as follows:Copy the Code code as follows:./configure--ENABLE-APC--enable-apc-spinlocks--disable-apc-pthreadmutexThe installation process is not said,

ArticleDirectory 2. Memory Management SGA allocation 4. Operation example Summary 1. What is SGA (refer to the Oracle memory structure-SGA)   SGAIt is a group of shared memory structures allocated to the system. It can

Http://happyboy200032.blog.163.com/blog/static/469031132010713129590/ Windows creates a wall around the address space of a Win32 program. Generally, the data in the address space of a program is private and invisible to other programs. However,

Environment Introduction: Dual-host operating system: solaris 10 database version: oracle 11g R1 64bit current host name and IP: fly-db2 192.168.20.21 current slave host name and IP: fly-db1 192.168.20.20 Background: The physical memory of the

Shared storage for inter-process communication in LINUXLINUX inter-process communication 1. Anonymous and named pipelines 2. Message Queue 3. shared storage Shared storage Overview: shared storage allows two or more processes to share a given

AppleDevelopment languageOpenCL MultithreadingThe source code for synchronization is described in this article. First, let's take a look at it.OpenCLThat is, Open Computing Language, which is composedAppleThe company drafted and designed a computing

I. Shared Memory: System Call: shmget (); When shmget () creates a new shared memory, it returns an identifier of the shmid_ds data structure that can be used to reference the shared memory. Prototype: int shmget (key_t key, int size, int shmflg

The following is my ontape-r summary. I just share my experience (because I have seen this post in the Forum, but it is not very detailed) The whole process is only completed in a unique environment that I can access. If you have any mistakes,

Command Line: vim/etc/sysctl. conf Check the setting values of the following two rows: Kernel. shmall = 2097152 Kernel. shmmax = 4294967295 If the default configuration is greater than the value given here, do not modify the original

Contents I. Hardware requirementsIi. SoftwareIii. System Installation notes4. system preparation before Oracle Installation5. install and configure Oracle6. Upgrade Oracle to patchset 10.2.0.47. Use rlwrap to call historical commands in sqlplus  

# Include # Include # Include # Include # Include # Include # Include # Include # Derefined segsize 100Void usage (){Fprintf (stderr, "shmtool-a utility for tinkering with shared memory/N ");Fprintf (stderr, "/nusage: shmtool/N ");Fprintf (stderr, "(

In short, generally set shmmax> = SGA (32-bit system supports SGA up to 1.7 GB). The default value is 32 MB,For 64-bit Linux operating systems, set shmmax to be greater than sga_max_size. The size of the Linux Shared Memory Page is 4 kb. The size of

Ask for memory sharing problems!!! The code is as follows: $sysid = $shmkey = Ftok (__file__, ' t ');$flags = "C";$mode = 0766;$size = 1024;$shmid = Shmop_open ($sysid, $flags, $mode, $size);Shmop_write ($shmid, "Hello", 0);$len = Shmop_size