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RAC Wait Event Naming Conventions Events that start with “GCS%” and “gc%” are Cache Fusion-related waits. In other word, they have to do with waits experienced in shipping current or consistent-read versions of blocks across instances in a RAC cluster Events that start with “ges%’ are related to Global Enqueue Services Block-Oriented RAC Waits […] I raised a SR that am not able to see the gc buffer busy wait event as expected and eventually got to know that it is no more. Before proceeding, what is gc buffer busy? Event ‘gc buffer busy’ event means that a session is trying to access a buffer,but there is an open request […] In RAC, you may all know about a TAF services which gives the failover capability to availability instances when the preferred failed. But how does this can work in when you have a Dataguard Environment with Primary and standby. Well answer is until 10g/11gR1 create a trigger like below and manage the service based upon […]
We all know that CGS (when 10g CRS uses, its OCSSD), (When used third party clusterware, CM) will provide Cluster group service which manages nodes integrity and restart them when there is node level (hardware,network,OS, scheduling) issues happens. So it means the CGS will manage the node level issues and also manages the cluster […] Modifying the VIP or VIP Hostname of a 10g Oracle Clusterware Node Reference Notes: Note 283684.1 How to Change Interconnect/Public Interface IP Subnet in a 10g Cluster For complete srvctl syntax on 10gR1, Refer to Appendix B of the RAC Admin Guide: http://download-west.oracle.com/docs/cd/B13789_01/rac.101/b10765/toc.htm Changing the VIP involves modification of the nodeapps, which includes the […] |
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Oracle 23c New Features for DBA's
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