Local Undo in 12.2 PDB in RAC
In 12.1 all PDBs shared a single undo tablespace. With 12.2 oracle introduced local undo, where each container has it's own undo tablespace on each instance it is opened. Which mode is currently used...
View ArticleChanging ORACLE_BASE, ORACLE_HOME and GI_HOME in a Oracle Restart Setup
This post gives the steps for changing the location of ORACLE_BASE, ORACLE_HOME, oracle Inventory and Grid Infrastructure in a Oracle restart setup. The current and new paths for these items are given...
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RAC DB on OCI PaaS
Unlike other cloud vendors, in OCI it is possible to create a 2 node RAC without any third party software. The minimum shape needed for creating a 2 node RAC for virtual machine type is...
View ArticleUpdating the OS and Patching OCI PaaS DB Using DBCLI
OCI provide a command line interface for managing the PaaS DB (DBCLI) beside the console. This post shows the steps for updating the OS and patching the DB System and the DB using DBCLI.Updating the OS...
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Backup and Recover Using DBCLI on OCI PaaS DB
OCI Paas DBs could be configured with automatic backup in which case OCI would take care of the backup. The database gets backed up to an object storage. But the backup files or the object storage...
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Installing 18c (18.3) RAC on RHEL 7 with Role Separation - Clusterware
This post is not a step by step guide to installing 18c RAC but list the main differences in the installation process compared to previous versions and things to look out for. Similar to 12cR2...
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Installing 18c (18.3) RAC on RHEL 7 with Role Separation - Database
Following the 18c clusterware installation the next step is to install database software and create the database. The database software installation is not much different from that of 12.2 database...
View ArticleDIA-49802: missing read, write, or execute permission on specified ADR home...
Executing an 18c (18.5) Oracle restart reconfiguration after a hostname change resulted in following error. #myDIV { border: 1px solid black; background-color: white; height:500px; overflow: scroll;...
View ArticleCreating Gold Images on 18c
#myDIV { border: 1px solid black; background-color: white; overflow: scroll; } Both gridSetup.sh in grid infrastructure and runInstaller in Oracle database software has the option to create gold...
View ArticleAdd or Remove Database Options with chopt
chopt tool allows easier way of enabling or disabling certain database options after the database software installation. chopt does the binary relinking as part of enabling or disabling. Following...
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Deleting a Node From 18c RAC
Deleting a node from a 18c RAC is similar deleting a node from 12cR1 RAC. Deletion has three distinct phases, that is removing of the database instance, removing of Oracle database software and finally...
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Upgrading Oracle Restart from 18c (18.6) to 19c (19.3)
This post lists the steps for upgrading an Oracle restart environment (Single instance non-CDB on ASM) from 18.6 to 19.3. The 18c setup is on RHEL 7. The OS and kernel versions are as followscat...
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Adding a Node to 18c RAC
This post list the steps for adding a node to 18c RAC which is similar to that of adding a node to 12cR1 RAC. Node addition is done in three phases. Phase one is to add the clusterware to the new node....
View ArticleORA-03186: Cannot start Oracle ADG recovery on a non-Oracle Cloud database on...
ORA-03186 occurs on a data guard configuration if the standby (or one of the standbys in a multiple standby configuration) was open for read only when the primary is restarted (or switchover happens...
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Adding a Node to 18c RAC Using Cloning
This post shows steps of adding a node by way of cloning on 18c. On 19c, extending RAC by way of cloning is depreciated. However, the steps are still listed on 19c clusterware. The post assumes all...
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Root.sh Fails with CLSRSC-119: Start of the exclusive mode cluster failed
On a two node cluster setup on 19c, running root.sh on the first node fails as below.Using configuration parameter file: /opt/app/19.x.0/grid/crs/install/crsconfig_paramsThe log of current session can...
View Article4K Sector, compatible.rdbms and Redo Log File Block Size
Disks these days comes in 512 or 4K sector sizes. Oracle DB is aware of the 4K sector size and supports it(including on ASM). The 4K sector size mainly affect the redo logs, standby redo log and...
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Changing OCI PaaS DB Shape
Currently the OCI PaaS DB doesn't have a way of changing its shape once created. For example if the DB is doing more load than initially anticipated and require more CPU power to be added then there's...
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Installing Enterprise Manager Cloud Control 13c (13.3)
This post gives the highlights of installing EM Cloud Control 13c (13.3). There are earlier post of installing grid control 11g and upgrading grid control to 12c.Database repository templates are...
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Installing 19c (19.3) RAC on RHEL 7 Using Response File
This post shows the steps for installing 19c RAC using response file (silent installation). This post is not a step by step guide to installing 19c RAC. The majority of the pre-reqs are same as that of...
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