ORACLE LOCAL REGISTRY (OLR)

In Oracle Clusterware 11g Release 2 an additional component related to the OCR called the Oracle Local Registry (OLR) is installed on each node in the cluster. The OLR is a local registry for node specific resources. THe OLR is not shared by other nodes in the cluster. It is installed and configured when Oracle … Continue reading ORACLE LOCAL REGISTRY (OLR)

Voting Disks in Oracle 11gR2 RAC

http://sandeepnandhadba.blogspot.in/2014/07/voting-disks-in-oracle-11gr2-rac.html Voting disks are important component of Oracle Clusterware. Clusterware uses voting disk to determine which nodes are members of the cluster.  After ASM is introduced to store these files, these are called as VOTING FILES. Primary function of voting disks is to manage node membership and prevent SPLITBRAIN Syndrome in which 2 or more … Continue reading Voting Disks in Oracle 11gR2 RAC

CLUSTERWARE PROCESSES in 11g RAC R2 Environment

i).Cluster Ready Services (CRS) $ ps -ef | grep crs | grep -v grep root 25863 1 1 Oct27 ? 11:37:32 /opt/oracle/grid/product/11.2.0/bin/crsd.bin reboot crsd.bin => The above process is responsible for start, stop, monitor and failover of resource. It maintains OCR and also restarts the resources when the failure occurs. This is applicable for RAC … Continue reading CLUSTERWARE PROCESSES in 11g RAC R2 Environment

Automatic Segment Space Management and LMT

Starting in Oracle8i, Oracle began to automate the management of objects within a tablespace. The first enhancement was called locally managed tablespaces (or LMTs). In an LMT, Oracle moves the tablespace information out of the data dictionary tablespace and stores it directly within the tablespace itself. The second major tablespace enhancement in Oracle9i, was automatic … Continue reading Automatic Segment Space Management and LMT

Increasing swap space on Oracle Linux

Refer to Original URL for details- https://matthiashoys.wordpress.com/2012/06/19/increasing-swap-space-on-oracle-linux/   Environment: Oracle Linux 6.2 64-bit, Oracle VM VirtualBox 4.1 Whenever you increase the physical memory of a Linux server, you probably also need to increase the swap space. There are several ways you can do this. In most cases, the swap space is present as a separate swap … Continue reading Increasing swap space on Oracle Linux