Below are the most effective techniques used by Oracle DBAs to speed up RMAN backups. 1. Increase RMAN Channels (Parallelism) RMAN uses channels as streams for reading data files and writing backup pieces. Increasing the number of channels enables parallel backup operations, significantly improving throughput. Example: CONFIGURE DEVICE TYPE DISK PARALLELISM 4; Or manually allocate […]
1. Clarify the Problem Scope First establish what exactly is slow. Key questions: Useful checks: Example query: SELECT sql_id, sql_textFROM v$sqlWHERE parsing_schema_name = ‘SCHEMA_NAME’ORDER BY elapsed_time DESC; This helps identify top SQL consuming resources. 2. Check Current Database Activity Verify if the issue is currently happening. Key views: Example: SELECT sid, serial#, username, sql_id, event, […]
1. DB Time Much Higher Than DB CPU Pattern Meaning Sessions are mostly waiting, not using CPU. Likely Causes Example Metric Value DB Time 8000 sec DB CPU 1200 sec This clearly indicates wait-based performance issues. 2. High db file sequential read Pattern Top Timed Event shows: db file sequential read Meaning Excessive single-block reads, […]
In the rapidly evolving data landscape where enterprises demand real-time analytics and operational agility, Oracle 19c elevates the In-Memory Column Store (IMCS) with a powerful capability: automatic memory management. This enhancement streamlines the way memory is allocated for in-memory objects, ensuring performance tuning becomes more adaptive, resilient, and aligned with dynamic workloads. It brings a […]