Oracle Data Guard, Oracle Data Guard Broker and Oracle Active Data Guard are the commercial names for technologies that allows physical and logical standby (slave) databases to be configured and managed with Oracle Database Enterprise Edition

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What are the Oracle Dataguard Implications of Migrating to a PDB?

If I have an OLTP database with two physical standby instances (one remote) what are the implications of migrating the primary DB to being an Oracle 12c PDB? i.e. Does the process of migrating to ...
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1answer
804 views

Oracle: How to gather stats in a logical standby database?

I have a Primary and a (logical) Standby Database. The Schema 'APP' gets synced. Now a User has performance issues running a query against some tables in this 'APP' schema of the Standby Database. On ...
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Standby controlfile error

I am doing dataguard. I have manually done a backup for the standby database. It was working fine. Problem arose when I used the standby controlfile. On the primary, I have created a standby ...
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1answer
210 views

How does direct path load work when dataguard is enabled?

There's a few posts about direct path and dataguard but I just want to understand exactly how it actually works. How maybe I made an incorrect assumption, but if direct path means it writes to the ...
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271 views

How to retire a physical standby in Oracle 11.2

I have a production Oracle 11gR2 RAC database with a single node physical standby. Now it has become the time to retire the old standby and pass that role to a RAC on fresher hardware. We don't use ...
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4k views

Oracle RAC with single node Data Guard physical standby

Best practices for Oracle 11gR2 Data Guard implies that the primary and standby databases should have the same layout, eg. RAC to RAC. What special considerations would one need to take into account ...
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344 views

Ora - 00088 error: command cannot be executed by shared server

I get this error from the database when I run the query: select status, error from v$archive_dest where dest_id=2; It's a dataguard environment. I have never seen this problem before. I'm not ...
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40 views

Oracle DataGuard: Find primary from standby DB

I have SYS access to a data guard standby DB, but i need to find the primary one. I was searching in Oracle Docs but couldn't find anything that could help.
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128 views

Error while duplicating Oracle database after failover, using 11.2.0.4

I've recently updated oracle from version 11.2.0.1 to 11.2.0.4 and my redundant system is no longer able to recover from failover. I'm using scripts both on primary and standby node to get back to a ...
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1answer
46 views

How to verify that a certain commit has been transmitted to standby

Scenario: Oracle Data guard 12c with 1 primary and 1 standby, Max. Av. protection mode Primary open, standby mounted (all green in OEM) Perform a dummy CTAS in primary Question: Without opening ...
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2k views

Startup NOMOUNT and Startup MOUNT on dataguard oracle

I have a question here about Oracle data guard. After performing a switchover, we shutdown the new standby database and startup it. At this stage, sometimes I find DBA performance in 2 different ...
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1answer
158 views

Can a production Oracle DB server also have a dataguard active standby for a different production database?

If you have a production oracle database (PRIM1) protected using Oracle Dataguard to a standby (STBY1) physical server in a different data centre, the standby server needs to be a similar ...
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Oracle DataGuard [closed]

Maximum performance and Maximum Availability modes has only difference right? Former is async mode and the latter is sync mode wherein it waits for acknowledgement for up to a time and after that it ...
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731 views

What is the nature of “LGWR: Setting 'active' archival for destination LOG_ARCHIVE_DEST_2”?

I'm not sure when this started, but for the time being the primary database instances in a physical standby configuration logs this message on every redo log switch. ...
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3answers
600 views

How to tell from the OS whether Oracle instance is a standby, assuming no DB access?

One can easily check via SELECT database_role FROM v$database; whether your Oracle database is a primary or standby database. Is it possible to make the same determination without database access, ...
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180 views

ERP (Oracle) real time backup [closed]

I work in a small company, that runs an ERP that holds about 600MB of data. My task at hand is, to find a way to always have real time backup of the erp (Oracle 11g) that can be retrieved easily (so ...
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3answers
104 views

Oracle Data Guard - redo logs not in chronological order?

The disadvantages section of the Wikipedia entry for Oracle Data Guard says: If the network link connecting primary and standby is over-subscribed, the redo logs are not applied in chronological ...
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232 views

RAC, data guard, physical stand by and impdp

We're setting up a RAC 2 nodes data guard 11g environment, with a remote physical standby (2 nodes also) We receive the client's data he exports with expdp. We have imported his dump in the primary ...
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74 views

Modify an Oracle Dataguard destination database

I'd like to set up some Oracle triggers to take action after rows are inserted, but I can't do this on our production database because it's controlled by a vendor. One alternative I was looking at is ...
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1answer
35 views

Strange error in trace file for NSAn standby process

One of the Oracle databases I help manage is the primary in a standby configuration, with two standby databases. I started finding repeated entries in the alert log on the primary for a failure to ...
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61 views

scipt for rman configuration & database backup in dataguard environment

environment Oracle Solaris 10 -> 5.10 Generic_147147-26 sun4v sparc Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit production Oracle Solaris Cluster 3.3u2 for Solaris 10 sparc ...
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62 views

flashback recovery in RAC enviorment using Data Guard Broker (oracle 12c)

I am trying to flashback recover using DGMGRL from the current primary node. I am running the following command at current primary: dgmgrl> reinstate database pri but I am getting the error ...
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102 views

Oracle 11G DataGuard: infrequent change of Log Archive Destination Role

currently we have the weired behavior of our DataGuard-Setup, in which the primary database somtetimes changes the role of "log_archive_dest_1" from "valid_for=(ALL_LOGFILES,ALL_ROLES)" to ...
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80 views

Error While Restoring Standby Database from RMAN Backup of Primary Database

On standby database i got error while restoring rman backup of primary database. Some targets not found. ORA 06100 no channel to restore a backup or copy of datafile datafile_number
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Oracle dataguard - Redo apply

In a low bandwidth environment when a transaction commits that generates a large amount of redo data will cause other independent transactions to slow down. This is because the redo data of small ...
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2k views

ORA-12514: TNS:listener does not currently know of service requested in connect descriptor at the time of switchover using data guard broker

I have a oracle data guard setup with nodes - one as primary and other as physical standby. I also, have configured the data guard broker on it. The problem is when I tried to switch over , I just ...
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57 views

Error While Restoring Standby Database from RMAN Backup of Primary Database

My Standby Database was corrupted. So i took primary database backup using RMAN. Transferred to my standby database. On standby, on startup nomount, restored standby control file then on mount stage, ...
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544 views

Oracle 10gR2 Data Guard Switchover

I need some help! I have a scenario of oracle 10gR2 database replication using data guard. I have selected the data guard command line interface. After my initial setup I can ship and apply logs from ...