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DBA’s often kill the blocking sessions and from 19c (not sure which patch set) we have new parameter called MAX_IDLE_BLOCKER_TIME parameter which helps to specifies the maximum number of minutes that a blocking session can be idle. After that point, the session is automatically terminated. A session is considered to be a blocking […] EZConnect is something very useful to make fast connection calls without requiring a TNS. Problem is that, until now, if you want to use some value pairs likes SDU, RETRY_COUNT, CONNECT_TIMEOUT, this wasn’t possible and you would end-up using TNS. Now in 19c you will be able to write something like: sqlplus user/pwd@//DB:1521/host?connect_timeout=100&transport_connect_timeout=10&retry_count=3 […] In Oracle 19c, one can submit the DML to readonly standby database. the internals of the database detect a dml on standby and redirect that dml to primary apply it on primary and apply to standby back. However this require careful consideration of redo generation and identify the potential dml’s or occasional dml;s that […] As per recent update in blogs.oracle.com, Oracle is planning to include a Standard Edition High Availability solution with Oracle Grid Infrastructure that provides cluster-based failover for Standard Edition Oracle Databases using Oracle Clusterware. Image Source: Blogs.oracle.com This will help customers who are on standard edition license to level high availability features that are […] Previous versions of Oracle database needs to manually manage the flashback area i.e flashback_retention_target to adjust according to growth of flashback logs Or manually backup the logs/backupsets to tape or to delete them But from Oracle 19c onwards, the management of space in the fast recovery area is simplified. Oracle Database monitors flashback logs […] In Oracle 19c Grid, Run the Oracle Grid Infrastructure installer in dry-run upgrade mode to determine if the system is ready for upgrade. To perform Oracle Grid Infrastructure dry-run upgrade, create a new Grid home with the necessary user group permissions, extract the Oracle Grid Infrastructure 19c gold image to the new Grid home, and […] Starting 19c, We can run DML operations on Active Data Guard standby databases. This enables you to run read-mostly applications, which occasionally execute DMLs, on the standby database. Automatic redirection of DML operations to the primary can be configured at the system level or the session level. The session level setting overrides the system level […] In Previous versions Oracle, When a service moves to an available instance, Oracle Database does not automatically move the service back to the preferred instance when the preferred instance restarts because: The service is running on the desired number of instances. Maintaining the service on the current instance provides a higher level of service availability. […] ADDM does not work in a pluggable database (PDB) by default, because automatic AWR snapshots are disabled by default in a PDB. Starting 19c , To use ADDM in a PDB, you must enable automatic AWR snapshots in the PDB by setting the AWR_PDB_AUTOFLUSH_ENABLED initialization parameter to TRUE and AWR snapshot interval greater than […] When flashback or point-in-time recovery is performed on the primary database, a standby that is in mounted mode can automatically follow the same recovery procedure performed on the primary. When flashback or point-in-time recovery is performed either on a primary database or a PDB in the primary database, the primary database or PDB is moved […] |
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Oracle 23c New Features for DBA's
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