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Database PL/SQL Language Reference, 11g Release 2 (11.2)

PL/SQL Subprograms

PL/SQL Function Result Cacheto cache the results of PL/SQL functions in a shared global area (SGA), which is available to every … relieves you of the burden of designing and developing your own caches and cache-management policies … . When a result-cached function is invoked, the system checks the cache. If the cache contains the … cached

Database SQL Language Reference, 11g Release 2 (11.2)

Comments

CACHE Hint\", tablespec::= ) The CACHE hint instructs the optimizer to place the blocks retrieved for the table at … the most recently used end of the LRU list in the buffer cache when a full table scan is performed … . This hint is useful for small lookup tables. In the following example, the CACHE hint overrides the … default caching

Database Administrator's Guide, 11g Release 2 (11.2)

Managing Memory

Sizing the Flash CacheAs a general rule, size the flash cache to be between 2 times and 10 times the size of the buffer … cache. Any multiplier less than two would not provide any benefit. If you are using automatic shared … memory management, make the flash cache between 2 times and 10 times the size of SGA_TARGET. Using

Database Concepts, 11g Release 2 (11.2)

Memory Architecture

Database Buffer CacheThe database buffer cache, also called the buffer cache, is the memory area that stores copies of … database instance share access to the buffer cache. Oracle Database uses the buffer cache to achieve the … following goals: Optimize physical I/O The database updates data blocks in the cache and stores

Database Administrator's Guide, 11g Release 2 (11.2)

Managing Memory

Flash Cache Initialization ParametersTable 6-4 describes the initialization parameters that you use to configure the flash cache. Table … 6-4 Flash Cache Initialization Parameters Parameter Description db_flash_cache_file Specifies the … path and file name for the file to contain the flash cache, in either the operating system file system … creates it during startup.

Grid Infrastructure Installation Guide for Linux, 11g Release 2 (11.2)

Advanced Installation Oracle Grid Infrastructure for a Cluster Preinstallation Tasks

2.7.10 Enabling the Name Service Cache Daemon, enable the Name Service Cache Daemon ( nscd ). To check to see if nscd is set to load when the system

Database Administrator's Guide, 11g Release 2 (11.2)

Managing Memory

Configuring Database Smart Flash CacheThis section contains the following topics on configuring Database Smart Flash Cache (the flash … cache): When to Configure the Flash Cache Sizing the Flash Cache Tuning Memory for the Flash Cache … Flash Cache Initialization Parameters Flash Cache in an Oracle Real

TimesTen Application-Tier Database Cache User's Guide, 11g Release 2 (11.2)

TimesTen Application-Tier Database Cache User's Guide - Contents

ContentsCache Concepts Data management design Overview of a cache grid Overview of cache groups Cache … instance Cache group types Transmitting updates between the TimesTen and Oracle databases Loading data … into a cache group: Explicitly loaded and dynamic cache groups Sharing

TimesTen Application-Tier Database Cache Introduction, 11g Release 2 (11.2)

TimesTen Application-Tier Database Cache Introduction - Contents

ContentsDatabase Cache Why is Oracle TimesTen In-Memory Database fast? TimesTen and TimesTen Cache feature … between servers Cached data with the TimesTen Cache Load data from an Oracle database into a … System monitoring Administration and utilities 2 Using TimesTen and TimesTen Cache Uses for TimesTen … Uses for TimesTen

Database Performance Tuning Guide, 11g Release 2 (11.2)

Instance Tuning Using Performance Views

10.3.13 library cache lockThis event controls the concurrency between clients of the library cache. It acquires a lock on the … the object This lock is also obtained to locate an object in the library cache.

Database Installation Guide for Linux, 11g Release 2 (11.2)

What's New in Oracle Database 11g Release 2 (11.2)

Database Smart Flash Cachefeature is a transparent extension of the database buffer cache using solid state device (SSD … ) technology. The SSD acts as a Level 2 cache to the (Level 1) Oracle system global area (SGA). SSD … storage is faster than disk storage, and cheaper than RAM. Database Smart Flash Cache with SSD storage … amount of disk I/O at a lower

Database Performance Tuning Guide, 11g Release 2 (11.2)

Instance Tuning Using Performance Views

10.3.12 library cache pinThis event manages library cache concurrency. Pinning an object causes the heaps to be loaded into

Database PL/SQL Language Reference, 11g Release 2 (11.2)

PL/SQL Subprograms

Advanced Result-Cached Function TopicsTopics Rules for a Cache Hit Result Cache Bypass Making Result-Cached Functions Handle Session … Result-Caching Granularity Result Caches in Oracle RAC Environment Result Cache Management Hot … -Patching PL/SQL Units on Which Result-Cached Functions Depend Rules for a Cache Hit Each time a result … stored in the

Database Administrator's Guide, 11g Release 2 (11.2)

Managing Memory

When to Configure the Flash CacheConsider adding the flash cache when all of the following are true: Your database is running on the … Solaris or Oracle Linux operating systems. The flash cache is supported on these operating systems … STATSPACK report indicates that doubling the size of the buffer cache would be beneficial. db file … sequential read is a top

Database Administrator's Guide, 11g Release 2 (11.2)

Managing Memory

Tuning Memory for the Flash CacheFor each database block moved from the buffer cache to the flash cache, a small amount of metadata … about the block is kept in the buffer cache. For a single instance database, the metadata consumes … flash cache. If you are managing memory manually, increase the size of the buffer cache by an amount

OLAP DML Reference, 11g Release 2 (11.2)

AW command

CACHECHANGED keyword AW LIST shows the analytic workspace as unattached. Cache Size By default the list … on the cached at one time and as new workspaces are added to the cache list, earlier workspaces are … : 1) mywk1, 2) mywk2. Now you issue an AW DETACH CACHE command for mywk3. Oracle OLAP removes mywk1 … from the cache

Application Express Application Builder User's Guide, 11g Release 2 (11.2)

Editing Page Attributes

Cache-7 Cache Attributes Attribute Description Cache Page Specify whether to enable page caching by … selecting Yes or No. Page caching can improve performance because the page displays from cache instead of … displaying dynamically. Cache Timeout Specify the amount of time for which a cached page remains … valid.

Database Performance Tuning Guide, 11g Release 2 (11.2)

Glossary

cacheAlso known as buffer cache. All buffers and buffer pools.

OLAP DML Reference, 11g Release 2 (11.2)

AGGMAP

CACHEWithin an aggregation specification, a CACHE statement tells Oracle OLAP whether to cache or store … using detail data from another variable, and whether to cache NA values when a summary values … calculates to NA. Note: The CACHE statement is only one factor that determines whether variable data that … Determines

OLAP DML Reference, 11g Release 2 (11.2)

ANY

CACHESpecifies slightly different internal behavior. Specify this keyword only when the original performance is extremely slow. dimension The name of a dimension of the result; or, the name of a relation between one dimension of boolean-expression and another dimension that you want as a dimension of the result. By default, ANY returns a single YES or NO value. When you indicate one or more dimensions