shared memory segment

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Linux advanced commands for oracle users-Resource Management

(1) free A common problem is: How much memory is used by my applications, servers, users, and system processes? Or How much memory is available now? If the memory used by running processes is greater than the available Ram, you need to move these

WebSphere mq6.0 for redhat4.6 setup

WebSphere mq6.0 for redhat4.6 setupCategory: WebSphere Read by 650 Comment (0) Favorites Report websphereredhatmanageribm message middleware statistics WebSphere MQ is IBM's commercial messaging middleware (middleware ). WebSphere MQ provides a

Mq ipc settings

Linux IPC parameter settings-command method: Echo 80>/proc/sys/Vm/overcommit_ratio, etc Msgmnb Maximum byte limit for each message queue. Msgmni The maximum number of message queues of the entire system. Msggsz The size (in bytes) of the message

Solaris semaphore, meaning of Editable shared memory parameters (these parameters are out of date under solaris10)

Online collection   Semsys: seminfo_semmni(Solaris9 Release) InSolarisVersion 10 is out of date. Description Specifies the maximum number of signal identifiers. Data Type Signed integer Default Value 10

[Linux] Process (vii)--Process communication

Inter-process communicationOne, pipe,Limitations of Pipelines:(1) Half-duplex, data can only flow in one Direction(2) Pipelines are generally used only between processes that have a common ancestor, typically a pipeline is created by a process, and

Linux Network Programming System V Semaphore (iii)

Realization of advanced first out shared memory segment based on producer-consumer model Producer consumer issues: This problem describes the two processes that share fixed-size buffers-so-called "producers" and "consumers"-that can occur when they

Ora-01102:cannot mount Database in EXCLUSIVE processing method

Start a RAC database today a node The Times is wrong!Sql> Startup MountORACLE instance started.Total System Global area 608174080 bytesFixed Size 1220844 bytesVariable Size 176164628 bytesDatabase buffers 427819008 bytesRedo buffers 2969600 bytesOra-

Ora-01102:cannot mount Database in EXCLUSIVE mode

a database with a test environment, because the disk exploded, a new hard disk, when the database collapsed when the startSql> Startup MountORACLE instance started.Total System Global area 608174080 bytesFixed Size 1220844 bytesVariable Size 17616462

Linux system programming (4)

An IPC object----Message Queuing IPC Object Commands (1) View IPC objects in the systemIPCS-A display of all IPC objectsIpcs-s/-q/-m (2) Remove IPC objects from the systemIpcrm-q/-s/-m ID 1. Get the key value The first type:key_t Ftok (const char

ORA-27125: unabletocreatesharedmemorysegment

This article introduces a ORA-27125 about oracle Database in linux: unabletocreatesharedmemorysegment solution. This article introduces a ORA-27125: unable to create shared memory segment solution for oracle databases in linux. This article

Oracle10g Memory Structure

1.SGA 1.1 query the SGA-related view 1.1.1 GV $ sga_dynamic_components SQL> select * From GV $ sga_dynamic_components; PS: 1) The allocation unit of SGA is Granule. Components in SGA are composed of granule, and granule information is provided by

Oracle ORA-01102 failure: Cannot mount database in exclusive mode

SQL> Conn/As sysdbaConnected to an idle instance.SQL> startupOracle instance started. Total system global area 276824064 bytesFixed size 778736 bytesVariable Size 137371152 bytesDatabase buffers 138412032 bytesRedo buffers 262144 bytesORA-01102:

Common traps and Analysis of Linux shared memory usage

Original article: http://davidlu1001.blogbus.com/logs/85182548.html Shared memory allows multiple processes to access the same memory space. It is the fastest available IPC format. It is designed to reduce the running efficiency of other

Shared Memory for linux Process Communication

1. Create shared memory Void * shmat (int shmid, void * shmaddr, int shmflg); this system call maps the shared memory zone corresponding to shmid to the virtual address space of the process, shmaddr is the starting address of the specified ing. If

Install oracle10 in SUSE Linux and solve the problem. suseoracle10

Install oracle10 in SUSE Linux and solve the problem. suseoracle10 I have summarized my experience in installing oracle10g on Redhat5.5 and SUSE10.1. When SUSE10 is installed with OraRun, the oracle user, oinstall group, and dba group will be

Linux shared memory practices (1) and linux shared memory practices

Linux shared memory practices (1) and linux shared memory practicesBasic concepts of shared memory The shared memory zone is the fastest IPC format. Once such memory is mapped to the address space of the process that shares it, data transmission

Unable to start after Oracle database is shut down due to exceptions

A system suddenly loses power, and Oracle cannot be started after the system is started. The following error is reported during startup: ORA-01102 cannot mount database in EXCLUSIVE modeError 1102 may be caused by the following possibilities: 1. In

How to Set kernel. shmmax in Linux

SHMMAX Available physical memory Defines the maximum allowable size of one shared memory segment. the SHMMAX setting shoshould be large enough to hold the entire SGA in one shared memory segment. A low setting can cause creation of multiple shared

System kernel parameters to be configured for Oracle Installation

When installing the Oracle database, you need to set the following system kernel parameters for Oralce propulsion. These parameters are briefly described as follows (the parameter values are kept in the file/etc/sysctl. conf) Kernel. shmmax: the

Common traps and analysis of shared memory usage in CentOS

Shared memory allows multiple processes to access the same memory space. it is the fastest available IPC format. It is designed to reduce the running efficiency of other communication mechanisms. It is often used in conjunction with other

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