“Opinions expressed are solely my own and do not express the views or opinions of my employer.” Oracle Data Guard is a great Oracle product that ensures high availability, data protection, and disaster recovery for enterprise data. However, as with any other product, sometimes there are some issues that appear and it is needed to be solved. Therefore, the post today will be about the error “ORA-01110: data file 0000: ‘$ORACLE_HOME/dbs/UNNAMED0ZZZ’”. Many causes can lead to this error but one that I can point out is when the primary database…
Category: Oracle Database General
Finding the alert log file anywhere
“Opinions expressed are solely my own and do not express the views or opinions of my employer.” Some database administrators have a hard time finding the alert log file in systems that they are not familiar with. Therefore, I decided to share two simple techniques to find the alert log file regardless of whether you know the system. Thus, the first technique is to check the alert log being connected to the SQL prompt using the x$dbgalertext view that brings the current information of the alert log. Therefore, this SQL…
ORAPWD : Password complexity failed for SYS user
I was creating an Oracle Data Guard environment when I got the following error while I was creating the password file: And the reason behind this error is that Oracle Corporation has been working hard to ensure more security in their database releases. Therefore, from the Oracle database release version 12.2, Oracle has changed some policies within passwords, and due to it, no longer weak passwords are allowed unless you want to. The new requirements about passwords that are allowed can be found in the chapter “3 Configuring Authentication” of…
Implementing Oracle Data Guard Broker 19c in an Oracle Standby RAC Database
Before I start, I would like to do a disclaimer and say that this is a procedure that might help you. However, I do not recommend you test it in a production environment before reading Oracle documentation and notes to understand the concepts that I will write here. Oracle Data Guard Broker is a utility that can help you manage your Oracle Data Guard. Among many benefits of using this utility, I highlight that while using it, it will not need manual intervention to recover the databases or eventually a…
Oracle Data Guard 19c: rfs (PID:11969): Possible network disconnect with primary database
One of the essential things in the configuration of Oracle Data Guard and Oracle Data Guard Broker is where the file tnsnames.ora is placed, which by default, from some other early releases of 19c it has been defined at $ORACLE_HOME/network/admin. However, in one of the environments that I was providing some job as a consultant, I could see the following outputs from the Oracle Data Guard broker utility : Just a brief explanation on the output above to make it easier to understand from now on: Standby database has db_unique_name…
Using Oracle Data Guard with Oracle Data Guard Broker? Disable your LOG_ARCHIVE_n parameters and reconfigure your Oracle Data Guard Broker settings
When configuring Oracle Data Guard Broker to be used in your Oracle Data Guard configuration, you must disable the parameter log_archive_dest_n to Null at Primary and Standby before starting your setup. Otherwise, you are going to receive the following error on your Data Guard configuration: “Error: ORA-16698: LOG_ARCHIVE_DEST_n parameter set for object to be added”. It’s effortless to modify this parameter, and an example on an Oracle RAC database it is as it is below on the Primary and Standby databases: #Primary: #Standby: The idea is the Broker control LOG_ARCHIVE_*…
PLS-00201: identifier ‘DBMS_JAVA.GRANT_PERMISSION’ must be declared
I was doing the deployment of data in one database when I got the following error message: After some researches, I found that the Oracle Database Java Packages component was invalid in the database as below: And the documentation that helped to find out it was (Doc ID 397770.1) and (Doc ID 2314363.1). This documentation helps you identify invalid components in the registry of your database and recreate this component in case one of them is with the INVALID status. After the procedure of creating any invalid features again, the…
ORA-01261: Parameter db_recovery_file_dest destination string cannot be translate
I was configuring an Oracle Data Guard 19c database, and when I tried to start the database, I received the following error: After some analysis, I concluded that the error was the “*.db_recovery_file_dest” parameter configured in the database. When you use a location on ASM, it is only necessary to specify the name of the disk group and not the directories inside the disk group. Knowing that I configured the parameter from : To: After the modification the pfile had the output below: Consequently, the startup worked after that: brunorsHi!…
AWR Snapshot listing empty results Oracle Database 12c Release 2 (12.2.0.1)
I was checking some performance issues in some databases and one of the issues I found was that I couldn’t get the snapshot IDs to choose the interval between “Begin” and “End” snapshot to create my report. I started to find the reason for not showing the expected output as I can list as below: Check tablespace SYSAUX usage: I had 25GB free of 75GB; So, OK. Parameter “statistics_level” was configured to TYPICAL; Thus, OK. Parameter “control_management_pack_access” was configured to “DIAGNOSTIC+TUNING”. So, OK. I checked MOS and started to do…
Services Summary…Service “86b637b62fdf7a65e053f706e80a27ca” has 1 instance(s). Don’t freak out!
Those who install and create a database running in the Oracle release 12.2.0.3 launched by Oracle Corporation in February 2019 might get surprised about the unknown hash services shown in the listener due to the PDB databases. I must say that my first thought was, “What?????”. Write in the comments how was yours. My first information is: don’t freak out! This service was introduced by the Oracle Database release 12cR2 due to the possibility of creating a PDB as a Proxy PDB. Thus, what you can see of new in…