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Oracle Team

Oracle Team

Getting in touch with shareplex

By | Database Administration & Monitoring | No Comments

Tuesday this week I had the opportunity to get in touch with shareplex, Quest’s replication solution. This product does not rely on Oracle licenses, so can also be used with Standard Edition. It is competitor of Oracle’s GoldenGate an used for asynchronous replication, too. An interesting feature is that not only committed transactions can be replicated, which is an advantage with big transactions. With this feature replication latencies within seconds can be realized. Also migrations…

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Oracle Team

Schema only account with Oracle 18.3

By | Database Administration & Monitoring | No Comments

With Oracle 18.3, we have the possibility to create schemas without a password. Effectively in a perfect world, we should not be able to connect to application schemas. For security reasons it is a good thing that nobody can connect directly to the application schema. A good way is to use proxy connections, in fact connect as app_user but using the psi_user password for example: Let’s create a user named app_user: SQL> connect [email protected] as…

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Oracle Team

How to migrate Grid Infrastructure from release 12c to release 18c

By | Application integration & Middleware, Database Administration & Monitoring, Database management, Oracle | No Comments

Oracle Clusterware 18c builds on this innovative technology by further enhancing support for larger multi-cluster environments and improving the overall ease of use. Oracle Clusterware is leveraged in the cloud in order to provide enterprise-class resiliency where required and dynamic as well as online allocation of compute resources where needed, when needed. Oracle Grid Infrastructure provides the necessary components to manage high availability (HA) for any business critical application. HA in consolidated environments is no…

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Oracle Team

PDB Snapshot Carousel Oracle 18.3

By | Database Administration & Monitoring | One Comment

A new feature with Oracle 18c is the PDB snapshot carousel. As indicated by its name a PDB snapshot is a copy of a PDB at a specific point in time. You have the possibility to create up to eight snapshots, when you reach the maximum number of snapshots, the last snapshot is over written. The snapshot carousel is obviously the name of all your PDB snapshots. We have the possibility to create automatic snapshots…

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Oracle Team

SQL Plan stability in 11G using stored outlines

By | Uncategorized | No Comments

Plan stability preserves execution plans in stored outlines. An outline is implemented as a set of optimizer hints that are associated with the SQL statement. If the use of the outline is enabled for the statement, then Oracle Database automatically considers the stored hints and tries to generate an execution plan in accordance with those hints (Oracle documentation). Oracle Database can create a public or private stored outline for one or all SQL statements. The…

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Oracle Team

Configure AFD with Grid Infrastructure software (SIHA & CRS) from very beginning.

By | Cloud, Database Administration & Monitoring, DevOps, Operation systems, Oracle | One Comment

Introduction : Oracle ASM Filter Driver (Oracle ASMFD) simplifies the configuration and management of disk devices by eliminating the need to rebind disk devices used with Oracle ASM each time the system is restarted. Oracle ASM Filter Driver (Oracle ASMFD) is a kernel module that resides in the I/O path of the Oracle ASM disks. Oracle ASM uses the filter driver to validate write I/O requests to Oracle ASM disks. In this blog I will…

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Oracle Team

PDB lockdown with Oracle 18.3.0.0

By | Uncategorized | No Comments

The PDB lockdown feature offers you the possibility to restrict operations and functionality available from within a PDB, and might be very useful from a security perspective. Some new features have been added to the 18.3.0.0 Oracle version: You have the possibility to create PDB lockdown profiles in the application root like in the CDB root. This facilitates to have a more precise control access to the applications associated with the application container. You can…

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Oracle Team

SCAN listener does not know about service

By | Database Administration & Monitoring | One Comment

When trying to connect to a database via SCAN listener in a RAC environment with sqlplus, an ORA-12514 error is thrown. Tnsping can resolve the connect string. Whereas connecting to the same database over node listener with sqlplus succeeds. One possible reason could be, that the parameter remote_listener of the database to be connected is not set to SCAN listener of RAC cluster. So try to set remote_listener to SCAN_LISTENER_HOST:SCAN_LISTENER_PORT like (e.g. host is scan_host,…

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Oracle Team

RMAN PITR recover table Oracle 12c

By | Database Administration & Monitoring | No Comments

At one client’s site, I had to restore a table someone had partially deleted one week before. Before Oracle 12c, we had to duplicate the target database to another server, and then to export and import data to the target database. But depending on the database size, it could cost a lot of time, and as nobody knew when the delete action happened, it was more practical to use the rman recover table command in…

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Oracle Team

The size of Oracle Home: from 9GB to 600MB – What about SQL Server?

By | Database Administration & Monitoring | No Comments

Holidays is over and let’s start working with a funny write-up. I was reading interesting stuff done by my colleagues Franck Pachot and Daniel Westermann about reducing the size of Oracle / PostgreSQL binaries at the minimum in the context of a Docker images. I was curious what can be done on SQL Server side on Linux environment but just keep in mind that some operations performed in this post are probably not supported in…

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