Two-step Oracle user tablespace proficiency

After a long period of development in Oracle databases, many users are familiar with Oracle user tablespaces. Here I will share my personal understanding and discuss it with you. The greatest difference between an SQL Server database and an Oracle database is the tablespace design. Oracle Database pioneered the design concept of tablespace, which makes an indelible contribution to the high performance of Oracle Database. In this case, many Oracle optimizations are implemented based on the tablespace design concept.

Controls the Oracle user tablespace quota.

In some large database applications, we need to control the disk space occupied by a user or a group of users. This is like setting a disk quota for each user on the file server to prevent hard disk space depletion. Therefore, in the database, we also need to limit the disk space available to users. To achieve this goal, we can implement it through the tablespace.

We can create different tablespaces in the Oracle database, set the maximum storage capacity for them, and then assign users to the tablespaces. In this case, the user's storage capacity is limited by the size of the tablespace. Of course, the advantages of table space are not just that. The higher the performance requirements of enterprises for databases, or the larger the database capacity, the greater the advantages of table space.

Next, let's take a look at the processing methods of tablespace in Oracle databases to see if they have sufficient advantages in performance and security to compete with SQL Server databases.

During database design, we recommend that the database administrator set the tablespace in the following order.

Step 1: Create an Oracle user tablespace.

When designing a database, you must first design the tablespace. We need to consider whether to create only one tablespace or multiple tablespaces, as well as the storage location and disk quota of each tablespace.

There is no uniform saying about how many tablespaces are designed reasonably. This is mainly determined based on the actual needs of the enterprise. If an enterprise needs to control the user's disk quota, it needs to set the tablespace based on the number of users. When the data capacity of an enterprise is large and it has high requirements on database performance, you need to set different tablespaces based on different types of data, to improve the input/output performance.

Step 2: Create an Oracle user tablespace and define the user's default tablespace.

When creating a user, we recommend that the database administrator specify the user's default tablespace. Because we use the CREATE statement to CREATE database objects, such as database tables, which are stored in the current default space of the database by default. If you do not specify the user's default tablespace, you must specify the tablespace each time you create a database object. Obviously, this is not very reasonable.

Note that different tablespaces have different permission control policies. The user has full control permissions on table space A, and may have only query permissions on table Space B, or even connection permissions. Therefore, configuring table space access permissions is also a way to improve database security.

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