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ORA-05031 error in Oracle Autonomous Database

  The ORA-05031 error in Oracle Autonomous Database indicates that the SGA (System Global Area) usage for a Pluggable Database (PDB) has exceeded its limit. This issue can arise due to resource constraints or misconfiguration and can significantly impact the performance of your database, especially during resource-intensive operations like Oracle Data Pump. Here are some steps to address and prevent this issue: mmediate Actions Check Resource Usage: Use the following query to monitor the SGA usage: SELECT NAME, VALUE / 1024 / 1024 AS VALUE_MB FROM V$SYSSTAT WHERE NAME IN ( 'session pga memory' , 'session pga memory max' , 'session uga memory' , 'session uga memory max' ); Verify if the SGA_TARGET or MEMORY_TARGET settings are close to the configured limits. Terminate Long-Running Sessions: Identify and terminate any runaway sessions or jobs that are consuming excessive resources: SELECT SID, SERIAL#, PROGRAM, STATUS, SQL_ID FROM V$SESSION W...
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Upgrade Pluggable Database to Oracle Database 23ai

  Here’s a simplified way to upgrade your Oracle Database in OCI to Oracle Database 23c AI using a refreshable clone PDB and AutoUpgrade. Benefits of This Approach: Reduced Downtime: It minimizes downtime compared to an in-place upgrade. New Base Database System: You’ll get a new system with an updated OS and Oracle Grid Infrastructure version. You can use this approach for a Base Database Service, Exadata Database Service, Exadata Cloud@Customer, or any Oracle Database option. My Environment PDB to Upgrade: SALES Source: Version: 19.23.0 Name: DBS19 Target: Version: 23.4.0 Name: DBS23 Steps to Upgrade: 1. Prepare AutoUpgrade Download the latest version of AutoUpgrade from My Oracle Support. Copy it to both source and target systems, optionally placing it in $ORACLE_HOME/rdbms/admin . Create an AutoUpgrade config file ( sales.cfg ), and save it on both servers: global.autoupg_log_dir=/u01/app/oracle/cfgtoollogs/autoupgrade global.keystore=/u01/app/oracle/cfgtoollogs/keystore...
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Key points on Read-Only Instance and Read-Only Database

 In Oracle, both Read-Only Instance and Read-Only Database provide mechanisms to limit data modifications, but they are used in different contexts and for different purposes. Here's a comparison: 1. Read-Only Instance Definition : A read-only instance is a configuration in Oracle Real Application Clusters (RAC) where one or more instances of a multi-instance database are set up to operate in read-only mode. This is typically done in environments with high concurrency for both read and write operations. Key Features : Allows real-time query scaling by dedicating specific instances to read-only operations. Write operations are not allowed on the designated read-only instance, but other instances in the cluster can still handle write operations. Useful in RAC configurations for load balancing , where read workloads can be distributed across multiple read-only instances. Instance-specific: The database remains fully functional (read-write) when accessed through other instances. Us...
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Steps to create database link between Oracle database and SQL Server

 Creating a database link between SQL Server and Oracle allows seamless data exchange between the two systems. Here’s a step-by-step guide: Step 1: Install the Required Drivers Install Oracle Database Gateway for SQL Server (ODG4MS). This acts as a bridge between Oracle and SQL Server. Ensure the Oracle Client is installed on the Oracle database server or the server acting as the gateway. Step 2: Configure the Oracle Database Gateway Locate Configuration Files: Navigate to the $ORACLE_HOME/network/admin directory on the Oracle Gateway server. Edit tnsnames.ora: Add an entry for the database link pointing to the SQL Server database: dg4msql =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = <SQL_SERVER_HOSTNAME>)(PORT = 1521))     (CONNECT_DATA = (SID = dg4msql))     (HS=OK)  -- Required for heterogeneous services   )   Edit listener.ora: Update the Oracle listener configuration to recognize the gateway: SID_LIST_LISTENE...
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OCI Wallets Features

 Oracle Database 23c, also known as Oracle Database 23c Free—Developer Release, marks significant advancements in database capabilities, particularly in areas of security, identity, and integration with AI technologies. Below is an overview of how Oracle Identity and Access Management (IAM) and Oracle Wallets are enhanced in this release, and their implications for AI-driven applications. 1. Oracle Identity and Access Management (IAM) IAM within Oracle Cloud Infrastructure (OCI) in the context of Oracle Database 23c continues to focus on robust identity controls, enabling streamlined access management while adhering to high security standards. Some key features include: Unified Identity Management : Oracle 23c ensures seamless integration with OCI’s IAM, allowing for a single point of management for user identities and database access. This helps in reducing complexity while maintaining strict access protocols. Granular Role Management : The database version extends support for mor...
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What's New with Oracle Cloud Guard in OCI?

 Oracle Cloud Guard is a game-changer for securing your cloud environment. Here are the top 10 features to know: Automated Threat Detection : Cloud Guard continuously scans for potential security risks across your OCI resources, providing automated detection and alerting. Built-in Remediation : With preconfigured policies, Cloud Guard offers automated remediation actions to address security threats instantly. Comprehensive Visibility : Gain end-to-end visibility into your OCI environment with dashboards and reports, helping you monitor and track risks in real-time. Customizable Policies : Cloud Guard allows you to tailor security policies based on your organization’s unique compliance needs. Risk Scoring : Each resource is assigned a risk score, enabling you to prioritize the most critical threats for immediate action. Incident Response Automation : Automate responses to incidents using predefined rules, reducing manual intervention and response time. Integrations with Oracle Secur...
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Identifying and Verifying a Domain in Oracle Cloud Infrastructure (OCI): Requirements and Implementation Steps

  Identifying and Verifying a Domain in Oracle Cloud Infrastructure (OCI): Requirements and Implementation Steps In Oracle Cloud Infrastructure (OCI), identifying and verifying a domain is essential for using various services such as DNS management, custom domain setup for applications, email services, and security features like SSL certificates. Verifying domain ownership ensures that you have legitimate control over the domain and helps with secure communication between your domain and OCI services. Below is a comprehensive guide covering the requirements and detailed implementation steps. Why You Need to Identify and Verify a Domain in OCI Custom Application Setup : You may need to map a custom domain (e.g., yourdomain.com ) to an OCI service like an Oracle Load Balancer, Web Application Firewall (WAF), or Object Storage static website hosting. Email Services : If you plan to use Oracle Cloud Email Delivery, domain ownership verification is required to send emails using a custom...
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