Oracle Real Application Clusters (RAC) is an option for Oracle Databases. It is a cluster database with a shared cache architecture that increases scalability and availability. Oracle RAC support is included in the Oracle Database Standard Edition and is an extra cost option for Enterprise Edition.

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Oracle RAC VIP issue

I have a two node RAC setup where my scan ips are registered in DNS and my public Ips are also registered in the dns. Now while connecting from my windows machine through oracle client in sql ...
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326 views

changing Virtual IP interface names on RAC nodes - how to reconfigure

We are adding an extra interface on our nodes and we are going to bond these so the VIP interface will change from eth5 to bond3. Can someone point on documentation on what to do to reconfigure the ...
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144 views

unable to connect to specific instance ORacle RAC

I did several operations by connecting successfully to all 4 instances but suddenly during one of the jobs, it failed with a TNS error. I checked the connect from SQL and one of the nodes is giving an ...
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92 views

Could we delete old database and grid version?

We upgraded rac system and I want to ask, could I delete old grid and database version? [oracle@orcl1 app]$ cd 11.2.0.3/ 12.1.0.2/ Middleware/ oraInventory/ 11.2.0.4/ grid/ ...
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32 views

Connecting to Standalone/RAC

I would like to know if SERVICE_NAME is always configured for a Oracle standalone and RAC setup or it's optional to set up. In my code I would like to connect to Database using SERVICE_NAME. But if ...
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508 views

Slowness after migration to RAC 11gr2

we are getting slowness after migrate from ORacle 10gr2 single db to Oracle 11204 oracle rac (standard ed) with asm, on oracle solaris 11. at this momento we have only one node. In the next days we ...
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0answers
138 views

Should an SCN obtained from one RAC node be immediately usable on other RAC nodes?

I'm seeing ORA-08181: specified number is not a valid system change number and don't understand why. The error happens around once a month from a process that runs every few minutes - so very rarely. ...
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154 views

Oracle Rac With Scan Error

I have installed Oracle RAC with ASM on Oracle Linux 5.8. My database version is 11.2.0.1. I have 2 node in my plan and all of them are active. I set scan in my DNS server but I can not connect to ...
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30 views

Changing database parameters after removing a node from RAC oracle

Oracle 11.2.0.3 on SunOS 5.1 i have a client who is running a 2 node RAC environment but has shutdown the instance on one of the nodes. I was wondering whether after doing this they should change the ...
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82 views

From RAC to Standby RAC With Active Dataguard

I have oracle database 11.2.0.3 with RAC feature , with 2 node on oracle linux 6.4 : ol6-112-rac1 and ol6-112-rac2 I want to create active data guard with RAC feature from this database , these ...
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145 views

Oracle RAC Database software installation failing after successful Grid installation

2 node installation. Grid successfully installed. RAC DB software installation fails on node 2. Logs below: ****Oracle Services For Microsoft Transaction Server failed**** Node 1 (installation ...
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684 views

Oracle Grid installation failing on all nodes other than node where installation is started from

[Please forgive the untidy ctrl+v here as i am not able to preserve the formatting when i paste it here ) Folks, Any clues what I am doing wrong here ? Trying to install a 2-node RAC and as a ...
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25 views

How can I debug this RAC IP issue?

I have a two node RAC database with 5 scan IPs. Issue is i'm able to ping all the scan ips from my database server whereas when I try to ping the same from my local pc, one of the scan ips is not ...
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168 views

Issues with SCAN IPs in Oracle RAC

I have 5 SCAN IPs running in my two node RAC database - 12c. Thing is that one scan listener is running in my node 1 and other listeners are running in node 2. When I try to ping the one scan listener ...
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199 views

Oracle 12c 2-node RAC, after first reboot CRS is hanging/stuck on octssd on the second node

My issue is with the Cluster Time Sync Service on the second node of an Oracle 12c RAC 2-node cluster on Oracle Linux. After the first reboot the second node is stuck on the octssd.bin process. I ...
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79 views

10.2.0.5 RAC instance running on Linux-64 recieved KEWRRFC: Remote Flush slave Failed, return code: 2

Last Friday one of two instances in our 10.2.0.5 RAC cluster was non-responsive after logging the following messages. We ended up rebooting the node and it came up successfully. While I will likely ...
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66 views

How to forwarding connection between 2 Oracle Database?

I have 2 Databases on independent 2 Linux server. I'm using Oracle 10G and 11G. I have this stage: client -> connect to Server A -> check Database A (check specific tablespace or database A is ...
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96 views

SYS_CONTEXT INSTANCE changing on failover?

When using Oracle RAC with either Fast Connection Failover or TAF (Transparent Application Failover), for a given database connection, is SYS_CONTEXT('USERENV', 'INSTANCE') going to change when ...