Oracle v$system_parameter: A Guide for Database Administrators

Introduction

Discover how to effectively query the Oracle v$system_parameter. You’ll learn essential SQL commands to access and manage system parameters that control various Oracle database functions.

This guide is ideal for Oracle DBAs who need to monitor or adjust system settings for optimized database performance. Gain insights into best practices for querying and interpreting the values of critical system parameters in Oracle.

• Oracle v$system_parameter: Displays system-wide parameter settings for the entire database instance.
• Oracle v$parameter: Shows parameter values specific to the current session, allowing session-specific adjustments.
• Key Differences:
  • Scope: v$system_parameter is instance-wide, while v$parameter is session-specific.
  • Usage: Understanding the difference helps in effective database management, optimizing both system stability and session flexibility.

What does Oracle “v$system_parameter” mean?

Oracle’s v$system_parameter is a dynamic performance view that provides information about the instance-level parameters of an Oracle database. It allows database administrators to view the current settings of various configuration parameters, which are essential for tuning and maintaining the database.

To check the values of these parameters, you need to log in to the Oracle database as a user with SYSDBA privileges and query the v$system_parameter view.

Step by step: Oracle v$system_parameter

Step 1: Log in and connect to the database as “SYSDBA“.

[huupv@devopsroles ~]$ sudo su - oracle
[oracle@devopsroles ~]$ sqlplus "/as sysdba"

Step 2: Check the value of a specific parameter

SYS@DEVOPSROLES > SELECT name, value FROM V$SYSTEM_PARAMETER where name = 'db_block_size';

The output will look like this:

NAME                 VALUE
-------------------- -----
db_block_size        9100

Step 3: Repeat the above query for other parameters:

To check value “db_cache_size” in Oracle Database.

SYS@DEVOPSROLES > SELECT name, value FROM V$SYSTEM_PARAMETER where name = 'db_cache_size';

To check the value of the java_pool_size parameter:

SYS@DEVOPSROLES > SELECT name, value FROM V$SYSTEM_PARAMETER where name = 'java_pool_size';

To check value “nls_language” in Oracle Database.

SYS@DEVOPSROLES > SELECT name, value FROM V$SYSTEM_PARAMETER where name = 'nls_language';

Check value “processes” in the Oracle Database.

SYS@DEVOPSROLES > SELECT name, value FROM V$SYSTEM_PARAMETER where name = 'processes';

To check the value “shared_pool_size” in Oracle Database.

SYS@DEVOPSROLES > SELECT name, value FROM V$SYSTEM_PARAMETER where name = 'shared_pool_size';

By querying the Oracle v$system_parameter view, you can easily obtain the current settings of various parameters, which is crucial for database administration and tuning.

Conclusion

the article on querying “v$system_parameter” in Oracle, it is essential to understand the power and significance of system parameters in managing and optimizing Oracle database environments.

This guide offers a comprehensive look at how to access and manipulate these settings, providing database administrators with the knowledge needed to ensure efficient database operation.

For further mastery of Oracle system parameters, continue exploring and experimenting with different queries and settings. I hope will this your helpful. Thank you for reading the DevopsRoles page!