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Oracle Database Audit using SYSLOG to capture Oracle Database can be configured to log events into a database table, XML files or syslog. To configure Oracle Database to log events using syslog: Configure SYSLOG 1. Execute the following commands: mkdir -p /var/log/oracledb/ touch /var/log/oracledb/oracledb.log 2. Add the following line to… Continue Reading Oracle Database Audit FGA using SYSLOG to capture

This note describes the procedure of implementing the GoldenGate plug-in for Oracle Cloud Control 13cR2. These versions are required for installing the plug-in: Enterprise Manager Cloud Control 13c Bundle Patch 1 (13.2.0.0.0) and later Oracle GoldenGate 12c (12.3.0.1.0) and later Oracle GoldenGate Plug-in for EMCC Release 13c http://www.oracle.com/technetwork/middleware/goldengate/downloads/index.html Download, install… Continue Reading Implementing the Golden Gate plug-in monitor for Oracle Cloud Control 13cR2(13.2.0.0.0)

This document will help you providing guideline to upgrade Oracle 11g RAC to Oracle 12c RAC clusterware  and Database . Author:-Saibal Ghosh https://www.linkedin.com/in/saibal-ghosh-ccsk-prince2-%C2%AE-469b0a7/ 1 Tasks Before Upgrade 1.1 Backup the Database: Before we start the upgrade, it is a best practice to backup the database, Oracle Cluster Registry (OCR) and… Continue Reading Upgrade of Oracle 11g RAC database to Oracle 12c RAC DBUA

Error in dataguard alert log/start managed recovery process:- SYS@XXX>alter database recover managed standby database; alter database recover managed standby database * ERROR at line 1: ORA-00283: recovery session canceled due to errors ORA-01111: name for data file 61 is unknown – rename to correct file ORA-01110: data file 61: ‘/u01/app/oracle/product/12.1.0/db_1/dbs/UNNAMED00061’… Continue Reading ORA-01111: name for data file is unknown – rename to correct file

Overview of New PULL method The original “push” process is based on image copies.With Oracle Database 12c, a “pull” (or restore) process is based on backup sets. A connection is first established with the source database. The auxiliary instance then retrieves the required database files from the source database as… Continue Reading Active RMAN duplicate clone 12c using section size and compress backupset

##Connecting RMAN############## rman TARGET SYS/target_pwd@target_str # connects in NOCATALOG mode rman TARGET / CATALOG rman/rman@rcat rman TARGET / CATALOG rman/rman@rcat AUXILIARY sys/aux_pwd@aux_str ##Create user and catalog in RMAN database ######## CREATE USER rman_dba IDENTIFIED BY rman_dba TEMPORARY TABLESPACE temp DEFAULT TABLESPACE rman_dba QUOTA UNLIMITED ON rman_dba; GRANT RECOVERY_CATALOG_OWNER TO rman_dba;… Continue Reading rman command reference

Database backup and restore after manual catalog RMAN backup 1.Please take backup of primary database ORCL rman target / nocatalog log=/tmp/rman_bkp.log << EOF1 run { backup as compressed backupset database format ‘/opt/app/oratest1/bkp/ORCL_%U’; backup as compressed backupset archivelog all format ‘/opt/app/oratest1/bkp/ORCL_ARCH_%U’; } exit; EOF1 Please copy it in backup location to… Continue Reading Database backup and restore after manual catalog RMAN backup

Cost Calculation for Full table Scan How FTS cost depends on system statistics Gather statistics manually on load: The following command will start to gather system statistics. SQL> execute DBMS_STATS.GATHER_SYSTEM_STATS (‘START’); Please wait for system warm up and stop gather system statistics after work load. This is called workload statistics.… Continue Reading ORACLE OPTIMIZER COST CALCULATIONS BASIC OVERVIEW

Prepare by: Nurullah Sharif Scope: Undo Advisor   Undo Advisor help to estimate the undo tablespace size and also advise of undo retention. SQL> @db NAME      OPEN_MODE ——— ——————– COLLPROD  READ WRITE   Undo retention is 900 sec which 15 min SQL> sho parameter undo NAME                                 TYPE        VALUE ———————————— ———–… Continue Reading Undo Advisor help to estimate the undo tablespace size and undo retention to avoid ORA-1555

Author: Saibal Ghosh About author: I am an Oracle professional with twenty plus years of experience and have deep knowledge and understanding of various facets of Oracle technology including basic Oracle Database Administration, Performance Tuning, Real Application Clusters, Data Guard and Maximum Availability Architecture. I also work a lot in… Continue Reading How to check and implement best practice for Oracle Database 11g onwards