ANIL VEJENDLA

 In the fast-paced world of database administration and development, the pressure to get things done often collides with the need for security. How many times have you, as a DBA, succumbed to the temptation of granting SELECT ANY TABLE or DBA privileges to a developer just to bypass a perplexing ORA-00942: table or view does not exist error? We’ve all been there. It’s the "Get it Working Now, Fix it Later" approach. The problem is, "later" rarely comes, and your database becomes a Swiss cheese of excessive permissions. This is the anti-pattern of the Principle of Least Privilege (PoLP) , which dictates that a user should only have the privileges necessary to perform their specific job - no more, no less. Over-privileged users are a massive security risk, turning a single compromised account into a database-wide breach. Oracle Database 23ai changes the game. With its focus on "Security by Design," 23ai introduces features that make implementing least pri...

  What is Oracle ARS? ARS is a fully managed backup and recovery service based on the proven Zero Data Loss Recovery Appliance (ZDLRA) technology. Problem: Traditional backups can lead to data loss between scheduled intervals (RPO) and slow recovery times (RTO). Solution: ARS offers real-time transaction protection, reducing RPO to less than one second . Key Benefits (Why ARS is recommended?) Zero Data Loss: Real-time redo transport ensures even the most recent transactions are protected. Incremental Forever Strategy: Only changes are backed up after the initial full backup, reducing database overhead and network traffic. Backup Immutability: Includes a retention lock feature to protect against ransomware and accidental deletion. Cloud Simplicity: Integrated directly into the OCI Console for "one-click" enablement Prerequisites : The minimum supported Oracle Database versions for using ARS within the Or...

                                                    ADG_REDIRECT_DML Introduction Historically, Active Data Guard (ADG) was strictly read-only. If an application needed to perform even a tiny "Insert into Audit_Log," it had to connect to the Primary. The  DML Redirection  feature marks a significant shift in ADG capabilities.  ADG_REDIRECT_DML allows the standby to accept DML, transparently redirect it to the Primary, and wait for the apply service to bring the change back. This functionality effectively eliminates the 'look-but-don't-touch' limitation, providing a seamless experience for read-mostly applications that require occasional data persistence. Prerequisites & Environment Oracle Database Version: 19c or higher. License: Active Data Guard option. Mode: Standby must be in READ ONLY WITH APPLY (Active Data Guard). Primary Databa...

Unable to connect to PDB  as a system in Oracle 12.2 Issue :  When we are trying to connect as system user it is hanging forever and not allowing new connections. (No issues observed with existing application connections) Error: Errors in alert log file Errors in file /u01/app/oracle/diag/rdbms/XXXXX/XXXXX/trace/xxxxx_ora_127384.trc: ORA-04088: error during execution of trigger 'SYS.BLOCK_TOOLS_FROM_PROD' ORA-00604: error occurred at recursive SQL level 1 ORA-20000: Development tools are not allowed here. ORA-06512: at line 13 2020-06-10 12:31:44.388000 +00:00 WARNING: CLMN has failed to cleanup a dead process for 2400 attempts 2020-06-10 08:38:11.555000 +00:00 WARNING: CLMN has failed to cleanup a dead process for 1000 attempts Errors in file /u01/app/oracle/diag/rdbms/xxxxx/xxxxx/trace/xxxxx_clmn_114254.trc  (incident=8918402) (PDBNAME=CDB$ROOT): ORA-00700: soft internal error, arguments: [ksuxdl: cleanup failures], [0x351C23FC0...