Advanced Oracle DBA Best Practices for Performance and Security Optimization

Oracle DBA is a complex system that requires precise configuration and tuning to ensure database security and performance. This article covers multiple aspects of Oracle DBA adjustment and optimization, including password management, performance tuning, log management, and storage management.

1. Password Management is a critical aspect of Oracle DBA, as the security of passwords directly impacts the overall database security. By default, database user passwords expire after 180 days. To prevent this, you can adjust the PASSWORD_LIFE_TIME parameter to control the lifespan of passwords.

1.1 Adjusting PASSWORD_LIFE_TIME: The PASSWORD_LIFE_TIME parameter controls the lifespan of passwords, which is set to 180 days by default. Adjusting this parameter ensures that passwords remain valid without causing database connection issues due to expiration.

2. Performance Tuning is key to maintaining database efficiency. Proper performance tuning can significantly improve the response time and throughput of the database.

1.2 Setting Dump File Size Limit: The size of dump files directly impacts database performance. Setting an appropriate limit for dump file size can enhance database performance.

1.3 Adjusting Default Partition Size: Default partition size adjustments can affect database performance. A reasonable partition size will help improve response time.

1.4 Disabling Automatic Undo Retention Adjustment: Disabling this feature can help optimize database performance.

1.5 Setting Parallel Process Limits: The number of parallel processes directly affects performance. Proper limits can improve database responsiveness.

1.6 Controlling the Retention Time of Control Files: Adjusting control file retention times enhances database security.

1.7 Disabling Delayed Initialization of Extents in 11g: Disabling delayed extent initialization can improve performance.

1.8 Disabling Result Cache: Turning off the result_cache improves performance by reducing resource consumption.

1.9 Disabling Login/Logout Auditing: Disabling login and logout auditing can significantly improve database performance.

1.10 Adjusting AWR Retention Time: Proper AWR retention time helps in optimizing database performance.

1.11 Disabling Adaptive Cursor Sharing: Turning off adaptive cursor sharing will reduce resource consumption and enhance performance.

1.12 Disabling Cardinality Feedback: Disabling cardinality feedback helps improve performance and reduce resource usage.

1.13 Configuring Events 28401 and 10949: Configuring these events can affect database performance and efficiency."