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The new era of spam? Technical-related comments that defeat anti-spam filters
Part of the tasks of every blogger is to update the anti-spam filters (a WordPress plugin in my case, akismet), read the comments in quarantine and either approve them, delete them or mark them as spam...
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First draft of a Common Oracle Environment… for the Cloud Database (and not...
I have just published on GitHub a draft of a common Oracle environment scripts that make the shell environment a little bit smarter than what it is by default. It uses some function and aliases that I...
View Article(unsupported) DST_UPGRADE_STATE is DATAPUMP(1) but no data pump jobs are...
This blog post contains unsupported commands. Do not try to use them without the supervision of Oracle Support! I have just run across an Oracle Database who had a broken configuration in...
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Oracle Grid Infrastructure 19c does not configure the local-mode automaton by...
I have been installing Grid Infrastructure 18c for a while, then switched to 19c when it became GA. At the beginning I have been overly enthusiast by the shorter installation time: Grid Infra 19c...
View ArticleOracle SW_ONLY install leads to relink with rac_off at every attachHome
OK, I really do not know what other title I should use for this post. I have developed and presented a few times my personal approach to Oracle Home provisioning and patching. You can read more in this...
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How to install and access Oracle Weblogic 12.2 in the Oracle Cloud...
I put here the steps required to install and access Weblogic in the OCI (mostly for me in case I need to do it again ). The assumptions are: you already have an account for the Oracle Cloud...
View ArticleSteps to remove/add node from a cluster if RHP fails to move gihome
I am getting more and more experience patching clusters with the local-mode automaton. The whole process would be very complex, but the local-mode automaton makes it really easy. I have had...
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Install and configure CMAN 19c in the Oracle Cloud, step by step
Installing and configuring CMAN is a trivial activity, but having the steps in one place is better than reinventing the wheel. Prepare for the install Download the Oracle Client 19.3.0.0 in the Oracle...
View ArticleParameter REMOTE_LISTENER pointing to a TNS alias? Beware of how it registers.
On an Oracle Database instance, if I set:alter system set remote_listener='cluster-scan:1521';The instance tries to resolve the cluster-scan name to detect if it is a SCAN address. So, after it solves,...
View ArticleChecking usage of HugePages by Oracle databases in Linux environments
Yesterday several databases on one server started logging errors in the alert log:ORA-00603: ORACLE server session terminated by fatal error ORA-27504: IPC error creating OSD context ORA-27300: OS...
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Duplicating a DB and setting up Data Guard through CMAN and SSH tunnel
I am fascinated about the new Zero Downtime Migration tool that has been available since November 28th. Whilst I am still in the process of testing it, there is one big requirement that might cause...
View ArticleORA-02002 and ORA-00942 while upgrading OWM to 19c
This is a quick post about a problem that we have had while upgrading a DB to 19c. At 91% of the upgrade, the OWM (Workspace Manager) upgrade was failing with this error error:*** WARNING: ERRORS FOUND...
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Understand your Database through graphs
During the last months I have had to deal with highly consolidated databases, where there was no basic rule to achieve something maintainable. Over many years (some schemas are 30 years old) the number...
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20 years… down the memory lane (and a complimentary news at the end!)
February 22nd, 2000. I was 20 when I started working as Junior Database Administrator for the service provider SemaGroup, who was born as a branch of the dying Olivetti. 20 years ago, tomorrow! In 20...
View ArticleParallel Oracle Catalog/Catproc creation with catpcat.sql
With Oracle 19c, Oracle has released a new script, annotated for parallel execution, to create the CATALOG and CATPROC in parallel at instance creation. I have a customer who is in the process of...
View ArticleMultitenant Pills – Change DBID for an existing PDB
When you plug the same PDB many times you have to specify “AS COPY” in the syntax:CREATE PLUGGABLE DATABASE ludo AS CLONE USING '/u01/app/oradata/ludo/ludo.xml';Otherwise, you will get an error similar...
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Multitenant Pills: Pushing your PDB to the Cloud in one step?
The Oracle Multitenant architecture introduces some nice opportunities, including local and remote cloning (see this example on ORACLE_BASE blog). However, the only available cloning procedure use the...
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Multitenant Pills: Partial PDB cloning (and cleanup)
When consolidating to multitenant, there are several consolidation patterns. Big, complex databases usually have special requirements for which it might be a good choice to go to single-tenant (a...
View ArticleAwk to format the files .ora (listener.ora, tnsnames.ora, etc)
Tired of formatting the tnsnames.ora to make it more readable, I have taken the nice awk examples from Jeremy Schneider: https://ardentperf.com/2008/11/28/parsing-listenerora-with-awk-and-sed/ and...
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How to get the Data Guard broker configuration from a SQL query?
Everybody knows that you can get the Data Guard configuration in dgmgrl with the command:show configuration;but few know that this information is actually available in x$drc:SQL> desc x$drc Name...
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