RAC Background Processes LMSn LMSn Global Cache Service Process Manage requests for data access across cluster Up to 20 in Oracle 10.1 LMS0-LMS9 LMSa-LMSj Up to 36 in Oracle 10.2 LMS0-LMS9 LMSa-LMSz In Oracle 10.1 and above, number of GCS server processes can be configured using gcs_server_processes parameter articles: RDBMS Server. Many Oracle databases are configured with a database block size of 8KB. Measuring Global cache traffic using AWR reports was not precise. UDP is one of the protocol used for cache fusion traffic in RAC and it is the Oracle recommended protocol. This provides end-to-end unattended recovery, rolling changes by workload, and full location transparency. Oracle RAC uses the cluster interconnect to send buffer cache blocks between instances running on different nodes. Data blocks requested from the Global Cache are of two types: current and consistent-read (CR) blocks. This post points out the issues surrounding Ethernet Jumbo Frame usage for the Oracle Real Application Cluster (RAC) Interconnect. Non-Oracle software and Oracle software not listed above, however, will not be able to benefit from this feature. Letâs demonstrate : Current configuration : Cluster name : cluster01 nodes ⦠In our case we will change the private interface name from eth7 to eth8(after confirmation from network team). a) Check for "gc cr lost blocks" wait event in Automatic Workload Repository (AWR)/sysstats. These baselines should be considered when deploying the Oracle Clusterware interconnect in an Shared Ethernet network topology. Oracle RAC comprises two or more Oracle database instances running on two or more clustered machines and accessing a shared storage device via cluster technology. Letâs demonstrate : Current configuration : Cluster name : cluster01 nodes ⦠If certified Network-attached Storage (NAS) is used for Oracle RAC and this storage is connected through Ethernet-based networks, then you must have a third network interface for NAS I/O. I'm in process of building Oracle RAC with 2 Oracle VM machines ebdb1 and ebdb2. Right away, we can see a problem with the MTU limitation for Oracle RAC's Cluster Interconnect. Oracle uses scp to perform the installation. It will not be able to perform its heartbeat with the cluster. From: "Tanel Poder"
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