Oracle can store different kind of files under FRA: – backupset: for RMAN regular backups. – datafile: for RMAN image copies. – autobackup: for control file autobackups. – flashback: If…

The database control file is a small binary file associated with only one database. Each database has one unique control file, although multiple identical copies are permitted. Use of Control…

A checkpoint is a crucial mechanism in consistent database shutdowns, instance recovery, and Oracle Database operation generally. The term has the following related meanings: • A data structure that indicates…

A lock is a mechanism that prevents destructive interactions. Interactions are destructive when they incorrectly update data or incorrectly alter underlying data structures, between transactions accessing shared data. Locks play…

Problem:While patching 19.3 GRID_HOME with July2019 RU patch 19.4 I got this error: [root@localhost bin]# export PATCH_LOCATION=/u01/oracle/RU_PATCHES/29708769 [root@localhost bin]# $GRID_HOME/OPatch/opatchauto apply $PATCH_LOCATION -oh $GRID_HOME OPatchauto session is initiated at Mon…

Instance recovery is the process of applying records in the online redo log to data files to reconstruct changes made after the most recent checkpoint. Instance recovery occurs automatically when…

Typically, you manually start an instance, and then mount and open the database, making it available for users. You can use the SQL*Plus STARTUP command, Oracle Enterprise Manager (Enterprise Manager),…

The most crucial structure for recovery is the online redo log, which consists of two or more preallocated files that store changes to the database as they occur. The online…