Find Hidden Parameters in Oracle: Unlock Performance Secrets

Discover Hidden Parameters in Oracle with SQL queries to extract undocumented system settings. Learn how to identify non-default hidden parameters for enhanced performance and optimization.

SQL Query to Find oracle Hidden Parameters:

Set lines 300
set pages 400
col NAME for a30
col value format a10
col DESCRIPTION for a100
SELECT name,value,description from SYS.V$PARAMETER WHERE name LIKE '\_%' ESCAPE '\';

SAMPLE OUTPUT:

If you want to find the Oracle undocumented parameters that have been modified from their default values, run the below query:

Set lines 300
set pages 400
col NAME for a30
col value format a10
col DESCRIPTION for a80
select name,value,description from sys.V$PARAMETER where name like '\_%' escape '\'  and ISDEFAULT='FALSE';

You can follow my other performance-related articles, like Oracle Table Fragmentation Script.

For more details on Oracle 19c tuning and optimization, check out Oracle Database 19c Documentation