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12c Compression Comparison
OLTP Table compression introduced during 11g is called Advanced Row Compression in 12c. However the old syntax still works on 12c as well. Advance row compression maintains compression during all types...
View ArticleConvert Single Instance DB to RAC DB - Manual Method
There are many ways to convert a single database to RAC. Using database template, rconfig or the manual method. This post shows the steps for manual method of converting a single instance database to...
View ArticleMoving Grid Infrastructure Management Repository (GIMR) Database (MGMTDB) Out...
With 12.1.0.2 creation of Grid Infrastructure Management Repository (GIMR) is mandatory. This results in a CDB called -MGMTDB being created at the end of the GI installation. This CDB (-MGMTDB)...
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12c Encryption
This post gives a highlight of using TDE in 12c. For detail information refer advance security guide. In 12c the orapki/alter system commands related to key management has been replaced with ADMINISTER...
View ArticleRelink Fails due to Requirement Checks Failure
Oracle recommends re-linking oracle binaries after OS upgrade. There are few earlier posts on this topic. In this case the server in question was a Amazon EC2 server and didn't have any swap...
View ArticleParameterizing Backup Tags
At times it may be necessary to customize the back tag value. This could be achieved in two ways.First method is used when a backups are run using a separate rman backup script file, which is used by...
View ArticleDirect NFS Setup
This post shows steps for setting up directNFS for 11.2 and 12.1 (steps are identical). For 11.1 please refer here.Direct NFS requires a working NFS setup to already exists. Create a NFS setup and...
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Changing The Cluster Name
This post shows the steps for renaming the cluster. The cluster consists of two nodes and current resources are$ crsctl stat res...
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For input string: SP2-0640: Not connected
Upgrade of a 11.1.0.7 instance to 11.2.0.4 fails with the following error message on DBUA. Following errors could be seen when DBUA trace.log is examined.[Thread-12] [ 2016-01-15 11:43:16.187 GMT ]...
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Installing 11.2.0.4 Standalone Server with ASM and Role Separation on RHEL 7
There are two earlier posts which shows the highlights of installing 11gR2 on standalone server with ASM and role separation on RHEL 6 and RHEL 5. This posts only mention the steps that are different...
View ArticleRestoring OCR and Vote Disks on Block Devices in a 11gR2 Cluster (11.2.0.4)
Using block or raw devices for OCR and vote disks is not supported for new installation of 11.2. However it is supported for upgraded systems. Following is from the Oracle clusterware admin guide...
View ArticleChanging Hostname in a Standalone DB Configuration with ASM
Grid infrastructure software is required to setup ASM in a standalone DB configuration. GI has hostname dependent directory paths and components. Changing the hostname in a such configuration requires...
View ArticleOpatch util Cleanup and .patch_storage
During a recent PSU apply it was noticed that grid home has grown to a considerable size.du -sh grid416G grid4Out of the 16GB majority of space was consumed by the .patch_storage directorydu -sh...
View ArticleUpgrading RHEL 7 OS in a 11gR2 (11.2.0.4) and 12cR1 (12.1.0.2) Oracle Restart...
As per Oracle documentation "You must relink the Oracle Clusterware and Oracle ASM binaries every time you apply an operating system patch or after an operating system upgrade." There are two earlier...
View ArticleValid Node Checking For Registration (VNCR)
Valid Node Checking for Registration (VNCR) allows restriction of instance registration to come only from know servers. This has replaced the use of COST (setting up COST for 11gR1 SE and 11gR2 SE) for...
View ArticleChanging SCAN Setting
The post lists steps for changing the SCAN setting in a cluster. This is a test system where the SCAN is currently resolved via the /etc/hosts file with a single IP.$ srvctl config scanSCAN name:...
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Identity Column Vs Trigger/Sequence Method for Populating Primary Key Column
Oracle 12c introduced a new featured called identity column which allows auto population of primary key columns, perfect for database models that use surrogate keys. Before the identity column was...
View Articlemount to NFS server failed: RPC Error: Program not registered.
Mounting to an NFS location was failing with following error. This was an existing NFS mount location which worked fine earlier.mount -t nfs -o...
View ArticleSecure External Password Store and Oracle Restart with Role Separation
Oracle secure external password store allows storing of password needed for database connection in a client side Oracle wallet. It allows password-less connection to the database and useful in running...
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Moving Role Separated Oracle Restart Setup to Single User Setup
Oracle role separation setup involves installing the grid infrastructure and oracle database software as different users. Commonly GI is installed as grid user and oracle database software as oracle...
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