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The following articles mainly introduce the Process Memory in the Oracle Memory structure. This article describes the Process Memory in the Oracle Memory structure. If you are an Oracle enthusiast. The following article will be meaningful to you. Process Memory in Oracle Memory Structure The Process Memory, in addition to The SGA (System Global Area), The Oracle Process also uses The following three Global zones: The Process Global Area (PGA ); The

Oracle The Process Memory: In addition to the SGA (System Global area), the Oracle process also uses the following three global zones: The Process Global area (PGA) The User Global area (UGA) The call Global area (CGA) A lot of people don't know the difference between PGA and UGA, in fact, the difference between the two is similar to the difference between a process and a session. Although it is genera

Basic information Situation:DB version: Oracle database 11g Enterprise Edition Release 11.2.0.1.0-64bit ProductionOperating system version: CentOS release 5.6Speed up index creation the main consideration is from the point of view: Using the nologging parameter Using parallel parallel parameters Use the manual PGA at the session level to manually adjust the Sort_area_size Modify other parameters Note : We do not manually adju

Welcome to the Oracle community forum and interact with 2 million technical staff to enter the PGA (ProcessGlobalArea), a private memory zone of serverprocess, which contains global variables, data structures, and some control information. In Oracle8i, PGA adjustment is very complex. You need to adjust SORT_AREA_SIZE, HASH_AREA_SIZE, BITMAP_MERGE_A Welcome to the Oracle Community Forum, interact with 2 mill

. The SGA database activity in each zone can be monitored independently, and resources can be allocated and retrieved according to the pattern used in the Oracle database. Let's first look at some of the differences between the following Oracle9i database and the Oracle8i database. One of the most important oracle9i is that there is no need to have a separate PGA space for all the dedicated connections to the Oracle database. In Oracle8i, for a dedic

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Tags: oracle CGA memory PGA UGA"Deep analysis--eygle" study notes1.2.3 PGA Management:[Email protected] Sql>show parameter area_size NAME TYPE VALUE---------------------------------------------------------- ------------------------------bitmap_merge_area_size integer 1048576create_bitmap_area_size Integer

or linux32-bit operating system, you must set the shmmax parameter of the operating system level. The space of SGA can be larger than shmmax. For details, refer to the Oracle Installation manual and operating system manual; NOTE 2: operations listed in this section (below) may require certain permissions. In actual work, if you find problems with related permissions, authorize the relevant user in time or operate as a user with a higher permission. Shows the overall Oracle memory structure: The

"Deep analysis--eygle" study notes1.2.3 PGA Management:[Email protected] Sql>show parameter area_size NAME TYPE VALUE---------------------------------------------------------- ------------------------------bitmap_merge_area_size integer 1048576create_bitmap_area_size Integer 8388608hash_area_size integer 13107

Oracle Architecture Diagram 1Oracle Architecture Diagram 2 User process (The generic name of the client that accesses Oracle)Use of tools: sqlplus, PL/SQL developerHow to access the database:This machine is accessed directly via sock (IPC Access-UDP Protocol) (Sqlplus/as SYSDBA).Establish a server connected to Oracle via TCP (Sqlplus Sys/[email protected] as SYSDBA) (Sqlplus sys/[email protected]:[email Protected]_name as sysdba--access to this method requires that the Listener.o

Automatic Memory Management type Automatic Memory Management: New Features of Oracle 11g, allowing the database to fully automatically manage memory SGA and PGA Components Automatic shared memory management: If this option is selected, SGA can be automatically managed, but PGA cannot be automatically managed. Automatic PGA memory management: This option can o

Oracle mass data accelerates index creation. database version: OracleDatabase11gEnterpriseEditionRelease11.2.0.1.0 Oracle mass data accelerates index creation. Database version: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-64bit Production Basic information: Database Version: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0-64bit Production Operating system version: CentOS release 5.6 To speed up index creation, consider the following: Use nologging Parameters Use para

************----Sum 4194304 Shared Pool 1: kngisga 16044X $ ksmfs table 12X $ rule_set 16804 ......Xscalc 3528Xslongops 4040Xsoqmehift 4168Xsoqojhift 3272Xsoqophift 4168Xsoqsehift 2376Xssinfo 5532************----Sum 113250900 Buffer_cached 46137344Fixed_sga 1260696Log_buffer 2932736************----Sum 50330776 1.2 SGA features 1) in Unix systems, SGA represents an independent physical entity in the operating system, that is, an independent shared memory segment, you can use IPCS-M | grep Ora to

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. Select event, total_waits, time_waited, average_wait from v $ system_event where event like 'Log file switch (arch % '; If there is a wait, check whether the storage device that saves the archived logs is full. Add a log file group and adjust log_archiver_max_processes. F. DB_block_checksum = true, which increases the performance burden. (To ensure data consistency, add a checksum to the block when writing data in oracle, and verify the checksum when reading data) 2. java pool For large a

Oracle memory management (one) [In-depth analysis of oracle-eygle] Study Notes 1. Memory Management The memory used by the ORACLE database mainly involves two aspects: PGA and SGA.1.1 PGA Management PGA refers to the Program Global Area, which is a memory Area used by the Server Process to contain data and control information.

Before assigning the appropriate size to the database with the new automatic memory management feature, you must first find the current amount of memory allocated to SGA and PGA. But it does not mean that sga _ Before assigning the appropriate size to the database with the new automatic memory management feature, you must first find the current amount of memory allocated to SGA and PGA. But it does not mean