Alok Giri Oracle

Migrating Oracle databases can be a complex process, especially when aiming to minimize downtime and data loss. Here are some tricks and techniques to facilitate a smoother Oracle database migration: 1. Pre-Migration Planning and Assessment Thorough Assessment : Conduct a thorough assessment of the source and target environments, including database versions, configurations, schemas, and data size. Compatibility Check : Ensure compatibility between source and target Oracle database versions. Use Oracle's Database Pre-Upgrade Information Tool ( dbupgdiag.sql ) to identify potential issues. Licensing Considerations : Verify licensing requirements and compliance on the target environment. 2. Choosing the Right Migration Method Oracle Data Pump : Best for one-time migrations with minimal downtime. Use parallelism ( PARALLEL ) to speed up data export and import. Oracle GoldenGate : Ideal for zero or near-zero downtime migrations. It allows real-time replication between the source and tar...

Setting up Oracle Data Guard on Oracle Cloud Infrastructure (OCI) involves several steps to ensure data protection and disaster recovery for Oracle databases. Below is a high-level overview of the process: 1. Prerequisites and Preparation Oracle Database Versions : Ensure that both the primary and standby databases are running supported Oracle Database versions. OCI Setup : You need an OCI tenancy with necessary permissions, VCNs (Virtual Cloud Networks), and subnets configured. Networking : Ensure the network configuration allows communication between the primary and standby instances. Access : SSH access to the database servers and Oracle Cloud Console access are required. 2. Prepare the Primary Database Configure Archiving : Enable archive log mode and set up the archive destination. Configure Initialization Parameters : Set necessary initialization parameters like DB_NAME , DB_UNIQUE_NAME , LOG_ARCHIVE_CONFIG , LOG_ARCHIVE_DEST_n , FAL_SERVER , etc. Create a Backup : Take a backup ...

  Oracle latch management is a critical component of the Oracle Database's concurrency control mechanism. Latches are low-level serialization mechanisms used to protect shared memory structures from simultaneous access by multiple sessions, ensuring data integrity and consistency. They are lightweight, in-memory locks that prevent contention and manage the allocation of resources among different processes. Here's a detailed explanation of Oracle latch management: Key Concepts.. Latches vs. Locks : Latches are designed for short-term protection of shared memory structures and are held for a very short time. They are primarily used to ensure that multiple sessions do not simultaneously modify shared data structures, preventing corruption. Locks are used to manage concurrent access to database objects like tables and rows, and they can be held for a longer duration. Types of Latches : Exclusive Latches : Only one process can hold an exclusive latch at a time, ensuring exclusive ...