What is result cache in Oracle 11g?

What is result cache in Oracle 11g?

Result Cache is a new feature in Oracle 11g and it does exactly what its name implies, it caches the results of queries and puts it into a slice of the shared pool. If you have a query that is executed often and reads data that rarely changes, this feature can increase performance significantly.

Does Oracle database cache query results?

Because it is. In an Oracle RAC environment, there is no global Result Cache; the Result Cache is maintained locally within the shared pool of the instance.

What is query result cache?

A result cache is an area of memory, either in the Shared Global Area (SGA) or client application memory, that stores the results of a database query or query block for reuse. The cached rows are shared across SQL statements and sessions unless they become stale.

How do I enable result cache?

You can enable Query Result Cache at the database level using the RESULT_CACHE_MODE initialization parameter in the database initialization parameter file. The same parameter can also be used at the session level using the ALTER SESSION command.

What is database caching in Oracle?

Oracle Database Cache improves the scalability and performance of applications that access Oracle databases by caching frequently used data on a middle-tier system. With Oracle Database Cache, your applications can process several times as many requests as their original capacity.

How does SQL caching work?

In SQL Server, the buffer cache is the memory that allows you to query frequently accessed data quickly. When data is written to or read from a SQL Server database, the buffer manager copies it into the buffer cache (aka the buffer pool).

What is SQL cache memory?

SQL Cache Memory (KB) Specifies the total amount of dynamic memory the server is using for the dynamic SQL cache.

How do I cache a SQL query?

SQL query statements that generate a cached query are:

  1. SELECT: a SELECT cached query is shown in the Catalog Details for its table.
  2. CALL: creates a cached query shown in the Cached Queries list for its schema.
  3. INSERT, UPDATE, INSERT OR UPDATE, DELETE: create a cached query shown in the Catalog Details for its table.

How does database cache work?

A database cache supplements your primary database by removing unnecessary pressure on it, typically in the form of frequently accessed read data. The cache itself can live in a number of areas including your database, application or as a standalone layer.