Oracle DBA

Monitoring Oracle Data Guard environments—especially in mission-critical setups—requires a robust and proactive approach. Oracle 19c provides a suite of dynamic performance views (V$ views), built-in diagnostics, and enterprise-grade tools to monitor and troubleshoot both Redo Transport Services and Redo Apply Services. This post highlights the essential views, tools, and practical metrics DBAs should leverage to […]

These questions focus on architectural depth, troubleshooting acumen, performance tuning, HA/DR integrations, and strategic considerations, aligning with enterprise-level expectations. 1. Explain the internals of Oracle RAC interconnect. How do you troubleshoot interconnect latency or packet loss? 2. How does Oracle 19c handle split-brain scenarios? What improvements were made over previous versions? 3. What are the […]

With the widespread adoption of Oracle Multitenant Architecture in enterprise environments, understanding how Data Guard operates with Container Databases (CDBs) and Pluggable Databases (PDBs) is critical. Oracle 19c, being a Long-Term Support (LTS) release, offers mature support for CDB-based Data Guard configurations. However, DBAs and architects must factor in specific considerations to ensure a robust, […]

Oracle Database 19c introduces a significant enhancement to the LISTAGG function by supporting the DISTINCT keyword directly within the aggregation clause. This simplifies query logic and improves readability when deduplicating values in aggregated string lists. Problem Statement The traditional LISTAGG function aggregates values into a delimited string but does not inherently remove duplicates, potentially leading […]