Dataguard for oracle RAC

I have to implement Dataguard or Physical Standby for a RAC primary node. Kindly share any docs or urls if you have;
TIA
Phani krishna.

Thanks Krish,
Lemme put my question in a clear way.
I want to copy a RAC database to a standby server. In regular scenes we take a hot backup and restore the same.
Am just thinking of copying from RAC to a flat file server.
Can i go ahead with export/import or any other solution available.
Warm Regards
Phani Krishna.

Similar Messages

Any Oracle best practice/standards for inter-DataCente links for Oracle RAC

Hello Oracle Experts,
Am working for a customer to set up Oracle RAC architecture hosting SAP/Non-SAP applications per SLA levels(MC/BC/Standard) specs. Currently my network team needs calculation to arrive at whether we will go for a (1), (2) or (3) 10Gig links for inter DC (Data-Center) for Oracle RAC.. below is additional background:
•     Porting all client SAP/Non-SAP Oracle databases to new 2 data-centers.
•     There will be 10 blades (4x BL680s and 6x BL460s) in each DC (can scale-up/out later on).
•     Clusters architecture to support Extended/Stretched RAC cluster feature
•     Clusters 2-node each(1-datacenter1, 1-datacenter2) and nodes distributed across 2 x c7000 such that no cluster has more than one node in an enclosure.
•     Each node will have - 4 NIC ports ( 2 x public and 2 x private) , 2 dual-port HBA
•     Oracle ASM/ACFS (ASM Cluster File System), Voting Disk, OCR and Database files
•     the versions are Oracle 11g RAC, Oracle 10g RAC and Oracle 9i (for DataGuard/Standby) on RHEL 6 on Proliant Blades (x86) + BladeMatrix
My network colleagues considering using DWDM across the 2 DCs(given the lesser cost?). Am still looking around if there are any Oracle/industry-best practices around this and having a calculation to support that..
Many Thanks in advance..
Regards,
Abhijit

Hi ,
There are no specific set of steps / practices for batch loading contents to ucm . It would be very much dependent on how many contents does the user have to load to UCM and how well the server is configured in terms of performance .
You can get more details from the following documentation link : http://docs.oracle.com/cd/E21043_01/doc.1111/e10792/c02_settings009.htm
Thanks,
Srinath

OIM 9.1.0.2 - Weblogic JDBC Multi Data Sources for Oracle RAC

Does OIM OIM 9.1.0.2 BP07 support Weblogic JDBC Multi Data Sources (Services>JDBC>Multi Data Sources) for Oracle RAC instead of inserting the "Oracle RAC JDBC URL" on JDBC Data Sources for xlDS and xlXADS (Services>JDBC>Data Sources> xlDS|xlXADS > Connection Poll> URL) ?
If yes, is there are any other modifications that need to be made on OIM, or just changing the data sources?

Yes, it's supported. You install against one instance directly of the Rac Server. Then you update the config.xml file and the jdbc resource in your weblogic server with the full rac address. It is documented for installation against RAC. http://docs.oracle.com/cd/E14049_01/doc.9101/e14047/database.htm#insertedID2
-Kevin

Encountered ora-29701 during Sun Cluster for Oracle RAC 9.2.0.7 startup (UR

Hi all,
Need some help from all out there
In our Sun Cluster 3.1 Data Service for Oracle RAC 9.2.0.7 (Solaris 9) configuration, my team had encountered
ora-29701 *Unable to connect to Cluster Manager*
during the startup of the Oracle RAC database instances on the Oracle RAC Server resources.
We tried the attached workaround by Oracle. This workaround works well for the 1^st time but it doesnt work anymore when the server is rebooted.
Kindly help me to check whether anyone encounter the same problem as the above and able to resolve. Thanks.
Bug No. 4262155
Filed 25-MAR-2005 Updated 11-APR-2005
Product Oracle Server - Enterprise Edition Product Version 9.2.0.6.0
Platform Linux x86
Platform Version 2.4.21-9.0.1
Database Version 9.2.0.6.0
Affects Platforms Port-Specific
Severity Severe Loss of Service
Status Not a Bug. To Filer
Base Bug N/A
Fixed in Product Version No Data
Problem statement:
ORA-29701 DURING DATABASE CREATION AFTER APPLYING 9.2.0.6 PATCHSET
*** 03/25/05 07:32 am ***
TAR:
PROBLEM:
Customer applied 9.2.0.6 patchset over 9.2.0.4 patchset.
While creating the database, customer receives following error:
ORA-29701: unable to connect to Cluster Manager
However, if customer goes from 9.2.0.4 -> 9.2.0.5 -> 9.2.0.6, the problem does not occur.
DIAGNOSTIC ANALYSIS:
It seems that the problem is with libskgxn9.so shared library.
For 9.2.0.4 -> 9.2.0.5 -> 9.2.0.6, the install log shows the following:
installActions2005-03-22_03-44-42PM.log:,
[libskgxn9.so->%ORACLE_HOME%/lib/libskgxn9.so 7933 plats=1=>[46]langs=1=> en,fr,ar,bn,pt_BR,bg,fr_CA,ca,hr,cs,da,nl,ar_EG,en_GB,et,fi,de,el,iw,hu,is,in, it,ja,ko,es,lv,lt,ms,es_MX,no,pl,pt,ro,ru,zh_CN,sk,sl,es_ES,sv,th,zh_TW, tr,uk,vi]]
installActions2005-03-22_04-13-03PM.log:, [libcmdll.so ->%ORACLE_HOME%/lib/libskgxn9.so 64274 plats=1=>[46] langs=-554696704=>[en]]
For 9.2.0.4 -> 9.2.0.6, install log shows:
installActions2005-03-22_04-13-03PM.log:, [libcmdll.so ->%ORACLE_HOME%/lib/libskgxn9.so 64274 plats=1=>[46] langs=-554696704=>[en]] does not exist.
This means that while patching from 9.2.0.4 -> 9.2.0.5, Installer copies the libcmdll.so library into libskgxn9.so, while patching from 9.2.0.4 -> 9.2.0.6 does not.
ORACM is located in /app/oracle/ORACM which is different than ORACLE_HOME in customer's environment.
WORKAROUND:
Customer is using the following workaround:
cd $ORACLE_HOME/rdbms/lib make -f ins_rdbms.mk rac_on ioracle ipc_udp
RELATED BUGS:
Bug 4169291

Check if following MOS note helps.
Series of ORA-7445 Errors After Applying 9.2.0.7.0 Patchset to 9.2.0.6.0 Database (Doc ID 373375.1)

Gig Ethernet V/S SCI as Cluster Private Interconnect for Oracle RAC

Hello Gurus
Can any one pls confirm if it's possible to configure 2 or more Gigabit Ethernet interconnects ( Sun Cluster 3.1 Private Interconnects) on a E6900 cluster ?
It's for a High Availability requirement of Oracle 9i RAC. i need to know ,
1) can i use gigabit ethernet as Private cluster interconnect for Deploying Oracle RAC on E6900 ?
2) What is the recommended Private Cluster Interconnect for Oracle RAC ? GiG ethernet or SCI with RSM ?
3) How about the scenarios where one can have say 3 X Gig Ethernet V/S 2 X SCI , as their cluster's Private Interconnects ?
4) How the Interconnect traffic gets distributed amongest the multiple GigaBit ethernet Interconnects ( For oracle RAC) , & is anything required to be done at oracle Rac Level to enable Oracle to recognise that there are multiple interconnect cards it needs to start utilizing all of the GigaBit ethernet Interfaces for transfering packets ?
5) what would happen to Oracle RAC if one of the Gigabit ethernet private interconnects fails
Have tried searching for this info but could not locate any doc that can precisely clarify these doubts that i have .........
thanks for the patience
Regards,
Nilesh

Answers inline...
Tim
Can any one pls confirm if it's possible to configure
2 or more Gigabit Ethernet interconnects ( Sun
Cluster 3.1 Private Interconnects) on a E6900
cluster ?Yes, absolutely. You can configure up to 6 NICs for the private networks. Traffic is automatically striped across them if you specify clprivnet0 to Oracle RAC (9i or 10g). That is TCP connections and UDP messages.
It's for a High Availability requirement of Oracle
9i RAC. i need to know ,
1) can i use gigabit ethernet as Private cluster
interconnect for Deploying Oracle RAC on E6900 ? Yes, definitely.
2) What is the recommended Private Cluster
Interconnect for Oracle RAC ? GiG ethernet or SCI
with RSM ? SCI is or is in the process of being EOL'ed. Gigabit is usually sufficient. Longer term you may want to consider Infiniband or 10 Gigabit ethernet with RDS.
3) How about the scenarios where one can have say 3 X
Gig Ethernet V/S 2 X SCI , as their cluster's
Private Interconnects ? I would still go for 3 x GbE because it is usually cheaper and will probably work just as well. The latency and bandwidth differences are often masked by the performance of the software higher up the stack. In short, unless you tuned the heck out of your application and just about everything else, don't worry too much about the difference between GbE and SCI.
4) How the Interconnect traffic gets distributed
amongest the multiple GigaBit ethernet Interconnects
( For oracle RAC) , & is anything required to be done
at oracle Rac Level to enable Oracle to recognise
that there are multiple interconnect cards it needs
to start utilizing all of the GigaBit ethernet
Interfaces for transfering packets ?You don't need to do anything at the Oracle level. That's the beauty of using Oracle RAC with Sun Cluster as opposed to RAC on its own. The striping takes place automatically and transparently behind the scenes.
5) what would happen to Oracle RAC if one of the
Gigabit ethernet private interconnects fails It's completely transparent. Oracle will never see the failure.
Have tried searching for this info but could not
locate any doc that can precisely clarify these
doubts that i have .........This is all covered in a paper that I have just completed and should be published after Christmas. Unfortunately, I cannot give out the paper yet.
thanks for the patience
Regards,
Nilesh

Copper cable / GigE Copper Interface as Private Interconnect for Oracle RAC

Hello Gurus
Can some one confirm if the copper Cables ( Cat5/RJ45) can be used for Gig Ethernet i.e. Private interconnects for deploying Oracle RAC 9.x or 10gR2 on Solaris 9/10 .
i am planning to use 2 X GigE Interfaces (one port each from X4445 Quad Port Ethernet Adapters) & Planning to connect it using copper cables ( all the documents that i came across is been refering to the fiber cables for Private Interconnects , connecting GigE Interfaces , so i am getting bit confused )
would appretiate if some one can throw some lights on the same.
regards,
Nilesh Naik
thanks

Cat5/RJ45 can be used for Gig Ethernet Private interconnects for Oracle RAC. I would recommend trunking the two or more interconnects for redundancy. The X4445 adapters are compatible with the Sun Trunking 1.3 software (http://www.sun.com/products/networking/ethernet/suntrunking/). If you have servers that support the Nemo framework (bge, e1000g, xge, nge, rge, ixgb), you can use the Solaris 10 trunking software, dladmin.
We have a couple of SUN T2000 servers and are using the onboard GigE ports for the Oracle 10gR2 RAC interconnects. We upgraded the onboard NIC drivers to the e1000g and used the Solaris 10 trunking software. The next update of Solaris will have the e1000g drivers as the default for the SUN T2000 servers.

Why do we use reverse proxy for Oracle RAC Cluster setup

Hello All,
I got this question lately.. "why do we use reverse proxy for Oracle RAC Cluster setup". I know we use the reverse proxy at Middleware level for multiple security reasons.
Thanks..

"why do we use reverse proxy for Oracle RAC Cluster setup".
I wouldn't. I wouldn't use a proxy of any sort for the Cluster Interconnect for sure.
Cheers,
Brian

Cat 6K configuration settings for Oracle RAC

Does anyone have experience with Cat6K design and configuration best practices for Oracle RAC?
TIA
Bill

Bill, personally I have not supported oracle real app clustering, however,I think you may find very good architecture information on this pdf link, is this more or less what you are looking for?
http://www.cisco.com/application/pdf/en/us/guest/netsol/ns50/c649/ccmigration_09186a00807688ce.pdf
you may find other docs here as well.
http://www.cisco.com/en/US/netsol/ns656/networking_solutions_program_home.html
Rgds
Jorge

Considering shared storage for Oracle RAC 10g

Hi, guys!
My Oracle RAC will be run on VMware ESXI 5.5. So, both 2 nodes and shared storage are on VM. Don't blame for this, I dont have another choice.
I am choosing shared storage for Oracle RAC. I am choosing between NFS and ISCSI server, both can be done in RedHat linux or FreeNAS.
Can u, guys, help me to do the choise?
RedHat or FreeNAS
ISCSI or NFS
Any help will be appreciated.

JohnWatson написал(а):
NFS is really easy. Create your zero-filled files, set the ownership and access modes, and point your asm_diskstring at them. Much simpler than configuring an iSCSI target and initiators, and then messing about with ASMlib or udev.
I recorded a public lecture that (if I remember correctly) describes it here, Oracle ASM Free Tutorial
I will be using OCFS2 as cluster FS. Does it make any difference for NFS vs ISCSI?

Need clarification for firmware & MPIO version for Oracle RAC

Dear All,
We have two-node Oracle RAC configuration 10gR2, Windos 2033 R2, 64-Bit OS using ASM and Oracle 11gR1 clusterware on HP Blades. The SAN storage is from IBM. We want to upgrade the firmware and MPIO version as per vendor recommendation.
Is there any requirement for Oracle RAC to have specific version of firmware and MPIO? Is there any matrix available for this? Or is it like both nodes should be able to see same SAN storage (LUN) irrespective of version used?
Thanks

Please note that Oracle RAC doesnt have requirement any sepcific firm ware. If you upgrade the firmware, it should not break any existing config, so pls check with IBM.
Also if you are doing any specific firmware upgrade then IBM should provide the supported version list.
Hope this help,
Regards
Satishbabu Gunukula
http://www.oracleracexpert.com

Adding Box for Oracle RAC(Clustering) to BIW 3.5 Oracle/Linus

Hai Gurus,
Suppose if we have 1 box with Bw3.5 Linux/Oracle and add another box to do Oracle RAC(clustring). Do we need to re-instal the Box 1 also or we can do that with small configuration changes.
Guide me.
Regards,
Mano

Hi Mano
As in most cases there is a short answer and a longer one. Short:
If your system is RAC ready, switching from single instance to cluster database and adding a new node is quite simple. From pure application side there will not be major changes necessary.
Long:
What do i need for oracle RAC, what do i have to do to make my system RAC ready?
Hardware / OS
You will need shared disks, cluster fs, on linux mostly OCFS2. If you don't have it yet, you need to get it and move your database on to it. You would probably need an additional lan interface for the interconnect.
Oracle / Database
You would have to install CRS, that is the oracle cluster software. Your oracle instance, listener will run as services controlled by CRS when RAC is enabled. You will need to configure separate redo threads and undo tablespaces for each node you add. Not least you would probably need an additional costly RAC extension license from your favorite oracle sales rep.
SAP
You should think about separate enqueue server and enqueue replication, although this is not mandatory. This is dependent on your reasons for using RAC. If it is high availability you should go for it.
This is not a complete list, i just wanted to give you an initial idea, please ask if you need further details. If you start into RAC just now, you will have a long way to go, otherwise the short answer will apply.
Best regards
Michael

Dataguard vs Oracle RAC

Could anybody please letme know what are the main 10 points of difference between ORACLE RAC AND DATA GUARD

In short, Oracle RAC and Oracle Dataguard are focusing on multiply different aspects of Database, they are mutual supplementation. However it's not cheap to have them both.
Oracle RAC is one Database Data storage with multiple hosts. One host down, database is still running virtually no downtime for swithover. When Data Storages down all hosts down.
Oracle DataGuard is multiple hosts with multiple data storages, one host down need a bit fail over time. when data storage down will also require a little fail over time.

How to configure Oracle Dataguard for Oracle 10g database

Hi Friends,
I would like to configuer Oracle Dataguard for my Oracle 10g Database.
Please provide me the configuration document.(step by step guide)
Regards,
DB

Hi
Go throw below link. This would be help to configure ODG..,
http://blogs.oracle.com/AlejandroVargas/2007/09/data_guard_physical_standby_im.html
http://blogs.oracle.com/AlejandroVargas/2007/10/data_guard_broker_observer_and.html
Thanks,
Mayilselvan.S

How to configure sun application server 8.2 for Oracle RAC 10g

Hello,
We have numerous boxes running the sun platform application server 8.2 and 2 boxes running enterprise version 8.2 all connecting to a 4 node Oracle RAC 10 G release 2 database. We have the system up and working. The application servers are connecting just fine to the database and the apps don't have any problems querying, inserting, etc. However, when we try to do failover testing of situations when a node or nodes of the Oracle RAC database goes down the application server does not gain new valid connections. Our configuration is this, OracleDataSource for the data source, table validation turned on with a valid table, ONS configuration set in properties, connectionCache enabled, and fastconnectionfailover enabled as well in the properties. We have that long oracle rac url with load balancing turned on set fot the database URL. We have the checkbox checked to fail all connections on any failure. ONS is configured properly within the database because we have a java application that runs outside of the application server that uses all the same settings described above (only set manually in our code for the OracleDataSource). This application works seemlessly when DB nodes are shutdown. We can shutdown all but one node and it's still humming along without skipping a beat. Start up one of the others, kill the last node, it still hums along nicely without skipping a beat. We'd really like to get the applications running in the application server to work the same way. Any help would be greatly appreciated. We've tried all the combinations that we can think of with configuration settings in the application server and it never works. Am tempted to rip out the database connection pool from inside the application server and configure it manually in the code but we are using entity beans and this is the much easier approach, if it will work. It's down to the point of does sun application server actually work with oracle RAC for connection failovers.

Hi,
We are also facing similar execption. Here is the error, we are getting, when a node is failed on RAC.
[#|2007-11-11T12:43:53.685+0000|WARNING|sun-appserver-ee8.1_02|javax.enterprise.system.core.transaction|_ThreadID=38;|JTS5041: The resource manager is doing work outside a global transaction
oracle.jdbc.xa.OracleXAException
at oracle.jdbc.xa.OracleXAResource.checkError(OracleXAResource.java:1270)
at oracle.jdbc.xa.client.OracleXAResource.start(OracleXAResource.java:318)
at com.sun.gjc.spi.XAResourceImpl.start(XAResourceImpl.java:184)
at com.sun.jts.jta.TransactionState.startAssociation(TransactionState.java:258)
at com.sun.jts.jta.TransactionImpl.enlistResource(TransactionImpl.java:181)
at com.sun.enterprise.distributedtx.J2EETransaction.enlistResource(J2EETransaction.java:397)
at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.enlistResource(J2EETransactionManagerImpl.java:312)
at com.sun.enterprise.distributedtx.J2EETransactionManagerOpt.enlistResource(J2EETransactionManagerOpt.java:114)
at com.sun.enterprise.resource.ResourceManagerImpl.registerResource(ResourceManagerImpl.java:113)
at com.sun.enterprise.resource.ResourceManagerImpl.enlistResource(ResourceManagerImpl.java:71)
at com.sun.enterprise.resource.PoolManagerImpl.getResource(PoolManagerImpl.java:176)
at com.sun.enterprise.connectors.ConnectionManagerImpl.internalGetConnection(ConnectionManagerImpl.java:268)
at com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:193)
at com.sun.enterprise.connectors.ConnectionManagerImpl.allocateConnection(ConnectionManagerImpl.java:122)
at com.sun.gjc.spi.DataSource.getConnection(DataSource.java:70)
at com.syntegra.nasp.etp.dax.DBManager.getConnection(DBManager.java:192)
at com.syntegra.nasp.etp.dax.DBManager.createDBCommand(DBManager.java:241)
at com.syntegra.nasp.etp.dax.DBManager.createDBCommand(DBManager.java:251)
at com.syntegra.nasp.etp.dax.sp.SPS_PRESCRIPTION_GUID_PROC.getCommand(SPS_PRESCRIPTION_GUID_PROC.java:31)
at com.syntegra.nasp.etp.dax.sp.SPS_PRESCRIPTION_GUID_PROC.execute(SPS_PRESCRIPTION_GUID_PROC.java:23)
at com.syntegra.nasp.etp.dax.PrescriptionBaseDataMapper.loadPresciptionByGUID(PrescriptionBaseDataMapper.java:203)
at com.syntegra.nasp.etp.model.PrescriptionBase.findByPrescriptionGUID(PrescriptionBase.java:176)
at com.syntegra.nasp.etp.messages.PatientPrescriptionReleaseRequest.execute(PatientPrescriptionReleaseRequest.java:120)
at com.syntegra.nasp.etp.service.ETPSLBean.processMessage(ETPSLBean.java:159)
at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:147)
at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:128)
at $Proxy6.processMessage(Unknown Source)
at com.syntegra.nasp.etp.listener.RequestListener.onRequest(RequestListener.java:204)
at com.syntegra.spine.csf.consumer.mdb.CSFListenerRegisteringConsumer.onRequest(CSFListenerRegisteringConsumer.java:54)
at com.syntegra.spine.csf.consumer.mdb.CSFConsumerBase.invokeListener(CSFConsumerBase.java:267)
at com.syntegra.spine.csf.consumer.mdb.CSFConsumerBase.processMessage(CSFConsumerBase.java:180)
at com.syntegra.spine.csf.consumer.mdb.CSFConsumerBase.onMessage(CSFConsumerBase.java:102)
at sun.reflect.GeneratedMethodAccessor96.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.sun.enterprise.security.SecurityUtil$2.run(SecurityUtil.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.enterprise.security.application.EJBSecurityManager.doAsPrivileged(EJBSecurityManager.java:955)
at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:158)
at com.sun.ejb.containers.MessageBeanContainer.deliverMessage(MessageBeanContainer.java:956)
at com.sun.ejb.containers.MessageBeanListenerImpl.deliverMessage(MessageBeanListenerImpl.java:42)
at com.sun.enterprise.connectors.inflow.MessageEndpointInvocationHandler.invoke(MessageEndpointInvocationHandler.java:130)
at $Proxy9.onMessage(Unknown Source)
at com.sun.genericra.inbound.DeliveryHelper.deliverMessage(DeliveryHelper.java:183)
at com.sun.genericra.inbound.DeliveryHelper.deliver(DeliveryHelper.
Regards
Selvan.

RCA for Oracle RAC Performance Issue

Hi DBAs,
I have setup a 2 node Oracle RAC 10.2.0.3 on Linux 4.5 (64 bit) with 16 GB memory and 4 dual core CPUs each. The database is serving a web application but unfortunately the system is at its knees. The performance is terrible. The storage is a EMC SAN but ASM is not implemented with a fear to further degrade the performance or not to complicate the system further.
I am seeking the expert advises from some GURUs from this forums to formulate the action plan to do the root cause analysis to the system and database. Please advise me what tools I can use to gather the information about the Root Cause. AWR Report is not very helpful. The system stats with top, vmstat, iostat only show the high resource usage but difficult to find the reason. OEM has configured and very frequently report all kind of high wait events.
How I can use effectively find Network bottle necks (netstat command which need to be really helpful to understand).
How I can see the system I/O (iostats) which can provide me some useful information. I don't understand what sould be the baseline or optimal values to compare the I/O activities.
I am seeking help and advised to diagnose the issue. I also want to represent this issue as a case study.
Thanks
-Samar-

First of all, RAC is mainly suited for OLTP applications.
Secondly, if your application is unscalable (it doesn't use bind variables and no SQL statements have been tuned and/or it has been ported from Sukkelserver 200<whatever>) running it against RAC will make things worse.
Thirdly: RAC uses a chatty Interconnect. If you didn't configure the Interconnect properly,and/or are using slow Network cards (1 Gb is mandatory), and/or you are not using a 9k MTU on your 1 Gb NIC, this again will make things worse.
You can't install RAC 'out of the box'. It won't perform! PERIOD.
Fourthly: you might suffer from your 'application' connecting and disconnecting for every individual SQL statement and/or commit every individual INSERT or UPDATE.
You need to address this.
Using ADDM and/or AWR is compulsory for analysing the problem, and/or having read Cary Millsaps book on Optimizing Oracle performance is compulsory.
You won't come anywhere without AWR and OS statistics will not provide any clue.
Because, paraphrasing William Jefferson Clinton, former president of the US of A:
It's the application, stupid.
99 out of 100 cases. Trust me. All developers I know currently are 100 percent clueless.
That said, if you can't be bothered to post the top 5 AWR events, and you aren't up to using AWR reports, maybe you should hire a consultant who can.
Regards,
Sybrand Bakker
Senior Oracle DBA

Dataguard for oracle RAC

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