How do I know if my standby database is in sync

Check the name and status of database.Check for GAP on standby.Check redo received on standby.Check redo applied on standby.Identify missing archive log files.Copy archive log files.Register archive log files with standby.

How do I check my production database and standby database sync?

Following command will help to check the Standby is sync with Primary Database in Oracle Dataguard Environment. select thread#, max(sequence#) “Last Standby Seq Applied” from v$archived_log val, v$database vdb where val. resetlogs_change# = vdb.

How do I check standby database?

Query the physical standby database to monitor Redo Apply and redo transport services activity at the standby site. SELECT PROCESS, STATUS, THREAD#, SEQUENCE#, BLOCK#, BLOCKS FROM V$MANAGED_STANDBY; To determine if real-time apply is enabled, query the RECOVERY_MODE column of the V$ARCHIVE_DEST_STATUS view.

How do I sync my standby database?

Find the current SCN of standby database. …
On the primary database – create the needed incremental backup from the above SCN. …
create a new standby controlfile from production. …
Cancel managed recovery on standby.

What is far sync standby database?

15/04/2014 Dataguard / Standby. Oracle Far Sync is an Oracle 12c new feature for Oracle Data Guard. This feature is meant to resolve the performance problems induced by network latency when you maintain a standby database geographically distant of the primary database.

How do I check my standby backlog?

How to find out the backlog of standby? from v$archived_log a, (select process,SEQUENCE#, status from v$managed_standby where process like ‘%MRP%’)m where a. SEQUENCE#=(m. SEQUENCE#-1);

How do I view stand logs in standby database?

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

How do I move archive logs from primary 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 recover my physical standby database?

Step 1: Check the sync status of primary and standby site. …
Step 2: Simulate a gap between the primary and standby. …
Step 3: Incremental backup. …
Step 4: Back up the standby control file. …
Step 5: Ship the backups across to the standby site.

How do I find my primary standby hostname?

You need to create a script for sqlplus. In the script, you first get the tns_alias standby bd from the log_archive_dest parameter. Then connect to standby bd as sysdba. Uodate 1 You can run the query on the main server and see the active sessions from the standby server.

Article first time published on

How do I sync my Primaryby database with standby 12c?

Create standby control file from PROD and move to standby.
Note down the SCN number of Secondary DB and start the RMAN backup from that SCN on Primary.
Copy the backup to Standby.
Mount the standby DB with new standby control file created.

What is V Archived_log?

V$ARCHIVED_LOG displays archived log information from the control file, including archive log names. An archive log record is inserted after the online redo log is successfully archived or cleared (name column is NULL if the log was cleared).

What is fast sync in Oracle 12c?

Fast Sync is a new Data Guard capability available with Oracle Database 12c. Fast Sync enables use of the destination parameter NOAFFIRM which specifies that the standby acknowledge receipt of redo without waiting for the write to the standby redo log file to complete.

How do I know if real time apply is enabled on standby database?

For logical standby databases, issue the statement, ALTER DATABASE START LOGICAL STANDBY APPLY IMMEDIATE; To determine if real time apply is enabled, you can query the recovery_mode column in the v$archive_dest_status view. It will display MANAGED REAL TIME APPLY when real time apply is enabled.

What is Fal_server and Fal_client in Data Guard?

Answer: The fal_server and fal_client are init. ora parameters are used for the gap resolution. … The fal_client specifies the FAL (fetch archive log) client name that is used by the FAL service, configured through the fal_server initialization parameter, to refer to the FAL client.

How do I check my MRP process in standby database?

1.To Start media recovery on standby database : SQL> alter database recover managed standby database disconnect from session;
Perform few log switch on Primary database. SQL> Alter system switch logfile; SQL> / SQL> /
Monitor Various process on standby database by :

How many standby databases we can create in 12c?

2 Standby Databases. A standby database is a transactionally consistent copy of the primary database. Using a backup copy of the primary database, you can create up to thirty standby databases and incorporate them into an Oracle Data Guard configuration.

What is V Log_history?

V$LOG_HISTORY displays log history information from the control file.

How do you resolve MRP stuck issues on a physical standby database?

% ps -ef |grep -i mrp. …
PROCESS THREAD# SEQUENCE# STATUS. …
SQL>recover managed standby database cancel; …
DGMGRL> EDIT DATABASE ‘<standby db_unique_name>’ SET STATE=’APPLY-OFF’;

How do you check whether physical standby is in sync with the primary or not and resolved gap?

Check the name and status of database.
Check for GAP on standby.
Check redo received on standby.
Check redo applied on standby.
Identify missing archive log files.
Copy archive log files.
Register archive log files with standby.

How do I know if my database is primary or standby?

You can use the DGMGRL show configuration and show database database_name commands to confirm the Data Guard Standby database configuration before enabling a standby database. Here is how you enable your primary and standby databases using the DGMGRL command: DGMGRL> enable configuration; Enabled.

How do I manually reset my standby database?

Use SQL*Plus to connect to the standby instance and then start the Oracle instance at the standby database. …
Mount the standby database: ALTER DATABASE MOUNT STANDBY DATABASE;

How do I rebuild my standby?

run { allocate channel c1 device type disk format ‘/backup/nsmdb/NSMDB_%U’; …
rman target / backup current controlfile for standby format ‘/backup/nsmdb/NSMDB_stby_ctl’;
rman target / startup nomount. …
SQL> alter database mount standby database; …
run { …
set lines 150.

How do I manually log in archive 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 restore a standby database from a missing archive log?

sqlplus “/ as sysdba” SQL>alter database recover managed standby database cancel; Media recovery complete. Step 4: scp the backup files to standby server to /tmp folder.

How enable Data Guard in Oracle?

Set the Database ARCHIVELOG Mode and FORCE LOGGING Mode.
Configure the Size of Redo Log Files and Groups Appropriately.
Use a Fast Recovery Area.
Enable Flashback Database.
Set FAST START MTTR TARGET Initialization Parameter.
Protect Against Data Corruption.
Set DISK_ASYNCH_IO Initialization Parameter.

How do I restore my Datafile from standby to primary?

On the primary database, take backup of all the datafiles which reside on /u05/PROD/ mountpoint. …
Transfer the backup pieces to the standby database.
On the physical standby database, catalog the backuppieces. …
Stop redo apply/MRP on the physical standby database.

How do I backup my standby Controlfile?

Take a backup of the controlfile for the standby database. Create necessary directories on the standby server. Create the initialization parameter, make necessary changes and copy it to the standby server. Copy password file to the standby server.

How do I roll forward a standby database using RMAN incremental backup in 11g?

Preliminary steps. 1.1 – Stop the recovery process on the standby. …
Perform RMAN incremental backups. …
Transfer the resulting backups on the standby server. …
Recover the standby database. …
Flashback mode.

What is V database?

V$DATABASE displays information about the database from the control file. … If the control file was re-created using the CREATE CONTROLFILE statement, then this column displays the date that the control file was re-created.

How do I find my archive log list?

Issue the archive log list command: SQL> archive log list.
Issue the show parameter command: SQL> show parameter db_recovery_file_dest.
Query the v$archive_dest view: SQL> select dest_name, status, destination from v$archive_dest;