“Can you please add 50 G to/u01 for me?” Many Oracle DBAs or system Admins are nervous about making changes to their Linux systems specially on a ODA (Oracle Database Appliance). ⇒ As you will see it’s very easy! The default size of 99GB for /u01 may not be sufficient and must be increased to […]
Author: Vincent
listener.log too big
My listener.log file is growing and now it is very big; I have difficulties to open it. What can I do when the listener.log is growing? Indeed, if you delete the LISTENER.LOG, the file will be recreated only after stopping and starting the listener … I want to archive it without boucing the listener (online […]
RAC architecture concepts
Oracle Real Application clusters (RAC) allows multiple instances to access a single Oracle database. These instances often run on multiple nodes. The Component Diagram with explanation shows all the components that inter-relate to each other and together make up THE “Oracle RAC architecture“. RAC is the principal component for the Oracle Grid Architecture. It’s […]
View Oracle hidden parameters
Hidden parameters in Oracle always start with an underscore. It is not possible for the DBA to see the hidden parameters with the SQL*Plus command “show parameter” or by querying v$parameter. Unless the hidden parameter is explicitly set in spfile/init.ora file. How Can I list all Hidden Parameters set in The database? As they are […]
Ultimate Database Health Check (DBMS_HM)
The Oracle DBA wants to run Health Checks command with Health Monitor upon his database. With Oracle 12c/18c, these checks can be done on a regular basis daily/monthly: – DB Structure Integrity Check – CF Block Integrity Check – Data Block Integrity Check – Redo Integrity Check – Transaction Integrity Check – Undo Segment Integrity […]