How to Fix ORA-20001 and KUP-04027 Errors in DBMS_QOPATCH When ORACLE_HOME Uses a Symbolic Link
Introduction Oracle Database provides the DBMS_QOPATCH package to expose information about installed patches and the OPatch inventory. It is commonly ...
Tag: Oracle Troubleshooting
Troubleshooting Slow RMAN Backup Performance – Step-by-Step Oracle DBA Guide
RMAN Backup Performance is a critical part of any Oracle DBA’s life.When backups start taking hours longer than usual — ...
Troubleshooting Database Performance After Patching or Upgrade – A Real-World Oracle DBA Guide
Database Performance After Patching or Upgrade can sometimes take a hit — even when the update was supposed to improve ...
Resolving High CPU Usage in Oracle Database – Real-World DBA Troubleshooting Guide
You log into the server, and your monitoring tool screams:CPU usage 99% — Oracle taking it all. Your users complain ...
ORA-00257: Archiver Error – Connect Internal Only, Until Freed (Oracle DBA Fix Guide)
It’s late in the day, your production database starts throwing errors, and your application logs fill up with this message: ...
ORA-15041: Diskgroup Space Usage Too High – How to Resolve ASM Storage Alerts (Real Oracle DBA Guide)
ORA-15041: Diskgroup Space Usage Too High is one of those Oracle ASM alerts that catches DBAs off guard — often ...
Top 10 SQL Performance Bottlenecks and How to Fix Them – Real Oracle DBA Guide
SQL Performance Bottlenecks in Oracle are every DBA’s daily challenge.One poorly written query or missing index can cause CPU spikes, ...
ORA-12541: TNS No Listener – Oracle Connectivity Fix Guide for DBAs
ORA-12541: TNS No Listener is one of those errors every Oracle DBA encounters — especially when databases are restarted, listeners ...
How to Monitor and Tune Oracle Undo Tablespace (Avoid ORA-01555 & ORA-30036)
Oracle Undo Tablespace is one of the most critical — yet often neglected — components of Oracle Database.It plays a ...
Reducing Oracle CPU Usage with SQL Plan Baselines and Adaptive Query Optimization
High CPU usage is one of the most common — and often misunderstood — performance issues in Oracle Database environments.When ...
