ora-02097 parameter cannot be modified because specified value is invalid

You might get ORA-02097 while changing PGA_AGGREGATE_LIMIT.

To set PGA_AGGREGATE_LIMIT we should take care of following allowable values : 2 GB (default value) 200% of the PGA_AGGREGATE_TARGET value 3 MB times the value of the PROCESSES parameter. Less then 1.2 X RAM – SGA Here In my case I am changing value according my […]

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Downgrade Oracle Database from 12c to 11gR2

We have already upgraded Oracle Database11gR2 to 12c, the whole process is still relatively smooth, although some of the previous version of the upgrade is not the same, but the overall difficulty is not too large, because of too many different features, greatly extended the upgrade time. But for Oracle 12c back to the previous […]

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Connecting PDB in Oracle 12c

To connect as sys or other elevated local users, use the same methods as below, but use ‘as sysdba‘ where necessary Method 1:

Method 2:For other methods, you need to know the service-name for the PDB: Get the service name for the PDB:

or by doing “lsnrctl services LISTENER” and locating service for […]

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ASM – (ACFS commands for multiple environments)

Overview of ACFS:- Oracle ACFS is designed as a general-purpose, single-node and cluster-wide file system that delivers support for customer file system application data maintained outside of Oracle Database. Users and applications can access and manage Oracle ACFS using native operating system file system application programming interfaces (APIs) and command-line interface (CLI) tools. Users can also […]

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ASM Clients

Being an Oracle DBA we have learned about ASM and its qualities. Today we are going to learn about ASM Clients.  We all are aware that Oracle ASM is a volume manager and file system for Oracle database files. Let’s start to have knowledge of ASM Client. Clients that connect directly to ASM. Oracle Database:-  This is […]

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Open Wallet Automatically After Starting The Database

This article about Open Wallet Automatically After Starting The Database.  If encryption wallet is enabled, then every time we start the database, we have to open the wallet manually. So to avoid this, we can create one trigger which will open the wallet automatically, once you start the database. Below is the trigger: CREATE or replace […]

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How To Use DBMS_PRIVILEGE_CAPTURE To Capture Privs In Oracle 12c

Introduction:- Oracle 12c introduced the DBMS_PRIVILEGE_CAPTURE package, which helps us in doing privilege analyze and find a report on used and unused privileges.In order to use the DBMS_PRIVILEGE_CAPTURE package, you must be granted the CAPTURE_ADMIN role. One of the most important Security Principals while maintaining your Enterprise Database Landscape is implementing the “least privilege” principle. The […]

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Purge AUD$ Table Using DBMS_AUDIT_MGMT

  Introduction:- Oracle 11gR2 introduced DBMS_AUDIT_MGMT for managing audit trails.  The growth of AUD$ can impact the performance of the database. So purging it regularly is the best practice followed by DBA’s and DBMS_AUDIT_MGMT makes it easier. Follow below steps for purging aud$ table. 1. Make sure AUD$ table is not in SYSTEM table tablespace.   […]

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ASM (Sector Size Validations)

From the technical background, we have an idea of Validations. I talk about normal life we notice that we have lots of Validations in our life. Let’s have look at today about ASM (Sector Size Validations). First few lines will explain the technical definition of  Validations. Validation is the name given to the process whereby the information entered […]

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ASM -(Sector Disk Drives)

This post is about ASM’s attribute deep knowledge. Before going ahead we must have an idea about the topic. Let’s some line must explain about  ASM -(Sector Disk Drives). The database and Oracle’s Automatic Storage Management (ASM) volume manager explicitly understood 4k devices. In this and subsequent versions of ASM, disk groups created on native mode […]

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