Oracle Dba

Sample tnsnames.ora Dedicated Server Entry (with ASM) Purpose The tnsnames.ora file is the client-side address book for Oracle Net. Each entry maps a short alias (SCR9) to a full network address — protocol, host, port, and target service. Without a working tnsnames.ora entry, sqlplus, rman, and any application using …

Sample listener.ora with Static SID_LIST and Extproc Purpose The listener.ora file is the server-side configuration for the Oracle Net listener — the process that accepts incoming client connections and hands them off to a database server process. The sample below — taken straight from the shutdownabort.com DBA Quick …

Delete the 500 Oldest Files in a Directory (Oracle DBA) Purpose Oracle's diagnostic destination (DIAGNOSTIC_DEST), audit file destination (AUDIT_FILE_DEST, also known as adump), and per-process trace directories collect thousands of small files over time. Inode counts, not bytes, are usually the limit that bites first …

List Files Opened by an Oracle Process with lsof -p Purpose lsof (LiSt Open Files) is the UNIX tool for inspecting which processes have which files open. For an Oracle DBA it is the fastest answer to four common questions: which datafiles is this server process touching, which trace file is PMON writing into right now, …

Oracle Data Pump Export Schema with expdp Command Guide Oracle Data Pump's expdp utility lets you take a fast, flexible logical backup of any schema in your Oracle database. This post breaks down a simple schema-level export command, explains each parameter, and shows you how to run it safely. What This Command Does …

Oracle RMAN Delete Obsolete Backups with Maintenance Channel Purpose The Oracle RMAN (Recovery Manager) commands shown in this script help database administrators manage backup storage by automatically removing old, unnecessary backup files. These commands allocate a maintenance channel for disk operations and delete …

Oracle RMAN Delete Expired Backup: Complete Guide to Repository Maintenance The DELETE EXPIRED BACKUP command in Oracle RMAN (Recovery Manager) removes expired backup records from the RMAN repository after they have been identified as inaccessible during a crosscheck operation. This command is essential for maintaining …

Oracle RMAN Restore Database Validate - Check Backup Integrity The RESTORE DATABASE VALIDATE command is one of the most critical proactive health check operations in Oracle Recovery Manager (RMAN) that allows database administrators to verify backup integrity without performing an actual restore operation. This command …

Oracle RMAN Report Obsolete Redundancy Command Guide Purpose The report obsolete redundancy = 2 command in Oracle Recovery Manager (RMAN) identifies database backups that are no longer necessary for recovery operations based on a redundancy-based retention policy. This command helps database administrators determine …

Oracle RMAN Crosscheck Archivelog - Fix RMAN-06059 Error Purpose The change archivelog all crosscheck command is an Oracle Recovery Manager (RMAN) utility that synchronizes the RMAN repository metadata with the physical reality of archived redo log files. This command specifically resolves the RMAN-06059 error, which …