Oracle 11g Partitioning: Unlocking New Levels of Performance（oracle11g分区）

Oracle 11g Partitioning：Unlocking New Levels of Performance

Oracle 11g partitioning is an advanced technology that provides users with a variety of tools necessary to manage data in a more efficient and cost-effective way while achieving high performance. It enables oracle databases to be divided into smaller pieces, allowing better control over the data stored in each partition. This facilitates the rapid retrieval of data as well as a reduction in the amount of resources required to store and manage it.

Partitioning makes Oracle 11g more efficient by allowing the server to store only relevant data in each partition. Instead of searching through entire tables, the server can quickly identify data within a specific partition. This increases the performance of query processing and allows the server to respond quickly to user requests. It also eliminates the need for temporary storage of large results that would overwhelm the system with redundant data.

Partitioning also eliminates the need for costly joins and reduces the I/O overhead for retrieving data. By breaking up a table into smaller parts, each partition can be accessed directly and only the required pieces of data will be returned from storage. This significantly increases the speed of processing many queries and reduces the chances of deadlocks and timeouts.

Partitioning also enables users to split large tables into smaller parts for easier maintenance. This makes it easy to clean up data and reorganize partitions, as only a single partition needs to be modified instead of the whole table. Oracle 11g provides a range of tools like ALTER TABLE, ALTER INDEX, and ALTER CLUSTER that facilitate partitioning.

In Oracle 11g, data is further broken down into sub-partitions, providing high scalability and further increases in performance. Sub-partitions are logical partitions, making it possible to increase the level of detail while organizing data into a number of groups. This feature allows users to divide data into smaller chunks such as product categories, regions, and time periods.

Oracle 11g partitioning is an advanced technology that offers powerful tools for managing data and increasing performance. It is a great tool for increasing scalability, improving query performance and reducing I/O costs. By unlocking new levels of performance and scalability, Oracle 11g partitioning makes it easier to access and manage data more efficiently.

参考如下代码：

//Create a partitioned table.

CREATE TABLE customers

(

customer_id NUMBER,

customer_name VARCHAR2(30),

customer_state VARCHAR2(2)

)

PARTITION BY LIST (customer_state)

(

PARTITION p1 VALUES (‘CA’),

PARTITION p2 VALUES (‘TX’),

PARTITION p3 VALUES (default)

);

//Create a sub-partition

ALTER TABLE customers

ADD SUBPARTITION sp1 VALUES (1,2,3);