Oracle DBA

XTTS (Cross-Platform Transportable Tablespaces) is used to migrate large Oracle databases between different platforms while minimizing downtime.It combines three technologies: The idea is: Below is the full operational procedure used in real migrations. Step 1 — Verify Platform Compatibility Identify the source and target platform endian format. SELECT platform_name, endian_formatFROM v$transportable_platformORDER BY platform_name; Confirm the […]

Transportable Tablespaces (TTS) is a powerful Oracle migration technique used to move large datasets quickly by transporting datafiles instead of exporting rows. The migration mainly uses: Below is the complete step-by-step process, where the RMAN conversion step is included when required. Step 1 — Check Platform Compatibility First determine whether the source and target platforms […]

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, […]