Guidelines

How do I know if archive logs are applied to standby database?

How do I know if archive logs are applied to standby database?

When querying the v$archived_log view for log_archive_dest_2 we can check what files are applied on the standby:

  1. select dest_id , sequence# , applied.
  2. from v$archived_log.
  3. where dest_id = 2.
  4. and sequence# > ( select max(sequence#) – 10 from v$archived_log )
  5. order by sequence#
  6. /
  7. DEST_ID SEQUENCE# APPLIED.

How do I find missing archive logs on standby?

At standby site, Do the log file registration at the standby site until all the missing log files are registered, Use this below command. SQL> alter database register logfile ‘/log/file/location/log_file_name_n. arc’; Now apply would take place and your standby will become sync with the primary.

How do I check my MRP process in standby database?

Make sure that Redo Apply is running (so that the change is applied to the standby database). If the following query returns the MRP or MRP0 process, Redo Apply is running. SQL> SELECT PROCESS, STATUS FROM V$MANAGED_STANDBY; To verify that deleted datafiles are no longer part of the database, query the V$DATAFILE view.

How can I tell if a database is standby?

On the primary database, check the last sequence that is generated. SQL> select max(sequence#) from V$archived_log; 4. On the standby database, check the last sequence that is applied….Using DGbrocker.

  1. Set proper ORACLE_SID, ORACLE_HOME.
  2. dgmgrl.
  3. connect /
  4. show configuration;
  5. show database ‘DB name’;

How do I check logical standby sync status?

If you would like to know the brief status of the logical standby sql apply status, we can query “v$logstdby_state” this view provides consolidated information from views v$logstdby and v$logstdby_stats.

How do I manually archive log to standby?

Copy the archive logs from primary to standby (Dbvisit ARCHDEST location), rename the files and then run dbvisit to apply logs. Copy the archive logs from primary to standby (Dbvisit ARCHDEST location), use RMAN to catalog the files and then apply them using RMAN.

How do I manually reset my standby database?

ora SQL> ALTER DATABASE MOUNT STANDBY DATABASE; Recover the database using the AUTOMATIC option: SQL> ALTER DATABASE RECOVER AUTOMATIC STANDBY DATABASE; The AUTOMATIC option automatically generates the name of the next archived redo log file needed to continue the recovery operation.

How do I check standby database?

  1. Step 1 : Check the status of database on both server.
  2. Step 2 : Check for GAP on Standby.
  3. Step 3 & 4: Check redo received and applied on standby.
  4. Step 5: Identify the missing archive log file.
  5. Step 6: Copy missing archive log file.
  6. Step 7: Register archive logfile with standby.

How do I start an active standby database?

8.1. 1 Starting Up a Physical Standby Database

  1. Start the database: SQL> STARTUP NOMOUNT;
  2. Mount the standby database: SQL> ALTER DATABASE MOUNT STANDBY DATABASE;
  3. Start the managed recovery operation: SQL> ALTER DATABASE RECOVER MANAGED STANDBY DATABASE 2> DISCONNECT FROM SESSION;

What should I check on my standby generator?

• Check the battery cables and connections. • Inspect drive belts. • Inspect the coolant heater. • Check coolant lines and connections. • Check for oil leaks and inspect lubrication system hoses and connectors. • Inspect the exhaust system, muffler and exhaust pipe. • Check and clean air cleaner units.

How to recover a standby database from primary?

STANDBY_SQL > alter database recover managed standby database disconnect from session; Database altered. Now the standby is completely in sync with primary and recovery is running fine. Lets check that. Now check the archive status in both the databases. 1. [Primary] Find current_scn from primary.

How to recover standby database when archive logs are missing?

In oracle 12c , We can use the rolling forward method to fix it . See Full article Here i have created a setup where archive is missing before it is being applied in the physical standby.

Why are archives not in sync with standby?

Normally in DR setup, the archives from primary shipped to standby and applied there. Suppose some of the archives hasn’t been shipped to secondary .But due to intermittence error or human error, the archives has been deleted from primary. So without those archives, standby can’t be in sync with primary.

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02/07/2021