pga mastercard

Oracle servers are primarily made up of instances, databases, program global, foreground processesExample: used to provide the ability to administer a databaseDatabase: Consists of an Oracle database file that is used to store system data, typically: Data files, control files, redo log filesThe instance can be further divided into: System global Area (SGA) and background process (Pmon,smon, etc.)While the SGA is a memory resource for the operating system, the background process uses the CPU and

Tags: Io ar file data C on R work ad PGA: it fully serves server process. It is allocated when server process is created and released when server process is terminated. it is not shared and only serves this server process independently. (Private memory space of server process)Purpose: 1. stores the private data and control files required for server process SQL Execution2. Session space, storing session and other related information3. SQL Workspace:

1, view SPFile location Show parameter SPFile; 2, Backup SPFile Create pfile= '/oracle/pid/bak/spfileecp.ora ' from SPFile; 3, set up dynamic management parameters automatic management Note Shared test settings (if memory 15G shared memory cannot be more than 8G) alter system setpga_aggregate_target=0 Scope=spfile; alter system setmemory_max_target=18g Scope=spfile; alter system setmemory_target=18g Scope=spfile; 4. Close the database Shutdown immediate; 5, open the database

In dedicated mode, the PGA stores stackspace, usersessiondata, and cursorstate. In shared mode, only stackspace is placed under PGA. While userser In dedicated mode, the PGA stores stack space, user session data, and cursor state. In shared mode, only stack space is placed under PGA. User ser In dedicated mode,

Tags: instruction class update variable content private Area LOB permissionsPga-program Global AreaThe PGA memory area is private and not shared, and any operations initiated by the user against the database, whether queries or updates, are preprocessed in the region before entering the instance area (which is done by the SGA and the system daemon process).What are the main pretreatment?First, save the user's connection information, such as session pr

2011-05-10 14:57:53Category: LinuxFirst, the memory structureSGA (System Global area): Shared by all service processes and background processes;The PGA (Program Global Area): is proprietary to each service process, background process, and each process has a PGA.Second, SGAcontains the data and control information for the instance, including the following memory structure: 1) database buffer cache: Blocks of data retrieved from disk are cached.2) Redo

局区 (PGA) memory Show Parameter Pga_aggregate_target Show parameter SGA; #除了SGA_MAX_SIZE, all others are dynamic parameters, that is, parameters that can be modified dynamically during database operation using the ALTER SYSTEM statement Show Parameter Sga_max_size #sga颗粒查询 #所有的SAG (each pool) with a minimum of memory unit particles (granule, also called the District Group) sql> Select Component,granule_size fromv$sga_dynamic_components; This co

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Os:aix 6 db:10205 ------Use OS commands to observe Oracle process memory consumption #ps GV . Size 23396516-a 14907:02 5203 14324376 2058800 xx 90815 38576 2.0 3.0 Oracle 23396516-a 14907:02 5203 14324376 2058800 xx 90815 38576 2.0 3.0 Oracle

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The following articles mainly describe the actual application of Process Memory in the Oracle storage structure. We all know the actual application processes of Oracle except for the SGA (System Global Area, the following three global zones are also frequently used: The Process Global Area (PGA ); The User Global Area (UGA ); The Call Global Area (CGA ). Many people do not know the difference between PGA