ORA-12537 Overview There're several possible causes to raise ORA-12537: Incorrect File Permission White or Black List ORA-12537 Caused by Incorrect File Permission Incorrect file permission… Read More »How to Resolve ORA-12537:TNS:connection closed
After installing grid infrastructure, you will have Oracle Clusterware, also called Cluster Ready Service, CRS controls all Oracle cluster components as resources, and manages the… Read More »How to Automatically Startup RAC Database after System Reboots
How to Resolve CRS-4995: The command 'Modify resource' is invalid in crsctl. Use srvctl for this command.
CRS-4995 For Oracle 11g, we can modify the attribute of a resource like this: [grid@primary01 ~]$ crsctl modify resource ora.dbname.db -attr AUTO_START=always [grid@primary01 ~]$ crsctl… Read More »How to Resolve CRS-4995: The command 'Modify resource' is invalid in crsctl. Use srvctl for this command.
After a fast-start failover, the broker will try to reinstate the standby database (former primary database) for sustaining data guard architecture. While reinstating, the broker… Read More »How to Resolve ORA-16649 after a Fast-Start Failover
Before enabling fast-start failover in data guard broker, the only required precondition is enabling Flashback Database. But before enabling Flashback Database, you must enable Flash… Read More »How to Implement Fast-Start Failover 11g
Since a fast-start failover (automatic failover) could become a false failover when the observer or the standby database cannot connect to the primary database within… Read More »How to Failover to a Standby Database Manually and Rebuild Data Guard - By Example