Oracle Database Error Solutions & DBA Guide

Oracle EBS Cloning with File System Synchronization (Complete Oracle Apps DBA Guide) 📅 Last Updated: August 2026 This guide has been completely updated for Oracle E-Business Suite R12.1 and R12.2 running on Oracle Database 11g, 12c, 19c, 21c, and Oracle Database 23ai. It explains Oracle Rapid Clone, file system synchronization, Oracle EBS dual file system architecture (fs1/fs2), AutoConfig, WebLogic considerations, post-clone validation, and production best practices for Oracle Apps DBAs. Oracle E-Business Suite cloning is one of the most common administrative tasks performed by Oracle Apps DBAs. Organizations regularly clone production environments to development, testing, quality assurance, disaster recovery, and training systems. Although Oracle Rapid Clone automates most of the cloning process, a successful clone involves much more than copying database files and application binaries. Oracle EBS administrators must ensure that configuration files, context fil...

FNDCPASS – Change SYSADMIN and APPS Passwords in Oracle E-Business Suite (Complete Oracle Apps DBA Guide) 📅 Last Updated: August 2026 This guide has been completely updated for Oracle E-Business Suite R12.1 and R12.2 running on Oracle Database 11g, 12c, 19c, 21c, and Oracle Database 23ai. It covers the legacy FNDCPASS utility, Oracle's recommended AFPASSWD utility, APPS/APPLSYS password synchronization, SYSADMIN password management, AutoConfig, WebLogic considerations, security best practices, and production troubleshooting. Managing passwords securely is one of the most important responsibilities of an Oracle E-Business Suite (EBS) Applications DBA. Password changes are required during system hardening, security audits, user administration, cloning activities, password expiration, and compliance with organizational security policies. Oracle E-Business Suite provides the FNDCPASS utility for changing passwords of application users, the APPS/APPLSYS account...

ORA-00845: MEMORY_TARGET Not Supported on This System – Complete Oracle DBA Guide 📅 Last Updated: August 2026 This guide has been completely updated for Oracle Database 11g, 12c, 18c, 19c, 21c, and Oracle Database 23ai running on Oracle Linux, Red Hat Enterprise Linux (RHEL), CentOS, Rocky Linux, AlmaLinux, and other supported Linux distributions. It explains Oracle Automatic Memory Management (AMM), Linux shared memory ( /dev/shm ), MEMORY_TARGET configuration, root causes of ORA-00845, and production-ready troubleshooting techniques. One of the most common Oracle startup errors encountered after installing Oracle Database or changing memory parameters is: ORA-00845: MEMORY_TARGET not supported on this system This error usually appears when starting the database after enabling Automatic Memory Management (AMM) by configuring the MEMORY_TARGET or MEMORY_MAX_TARGET initialization parameters. Although the error appears to indicate an Oracle configuration p...

Blank Oracle E-Business Suite R12 Login Page – Complete Troubleshooting Guide 📅 Last Updated: August 2026 This guide has been completely updated for Oracle E-Business Suite R12.0, R12.1, and R12.2 running on Oracle Linux, Red Hat Enterprise Linux (RHEL), and other supported platforms. It covers Apache, OACore, OA Framework, JSP cache corruption, AutoConfig, GUEST account synchronization, log analysis, and production troubleshooting techniques used by Oracle Apps DBAs. One of the most frustrating issues faced by Oracle Applications DBAs is opening the Oracle E-Business Suite login URL only to find a completely blank page. Instead of displaying the familiar Oracle EBS login screen, the browser may show a white page with no errors, no login fields, and no useful information. In some environments, the problem occurs intermittently, while in others it prevents all users from accessing Oracle E-Business Suite. Although the symptom appears simple, the root cause ma...

SYS AS SYSDBA Should Require Password? Oracle Authentication Explained (Complete Guide) 📅 Last Updated: August 2026 This guide has been completely updated for Oracle Database 11g, 12c, 18c, 19c, 21c, and Oracle Database 23ai. It explains how SYSDBA authentication works, the difference between operating system authentication and password file authentication, why sqlplus / as sysdba does not require a password, how remote SYSDBA authentication works, and Oracle security best practices for production environments. One of the most common questions asked by Oracle Database Administrators is: "Why can I connect using sqlplus / as sysdba without entering the SYS password?" Many administrators assume that SYSDBA authentication should always require a password. However, Oracle Database supports multiple authentication mechanisms, and the answer depends on how the connection is being established. When connecting locally on the database server, Oracle ...