Oracle RAC performance and Tuning part-1How to tune global cache services and ggc cr multi block request wait event?LMS process called as Lock Manager Server Process , also called the GCS (Global Cache Services) process. Main work of this process is to transport blocks across to the nodes of Oracle RAC for cache fusion supportability. If any consistent read request found from another connected node then LMS process makes consistent read image of block and transport it to across the nodes for full feeling client consistent read request. This images transports using High Speed Interconnect process to and from remote nodes.Multi block read called as full table scan and it uses multiple blocks and mode large read request. While during cache fusion, a global cache service makes same blocks to consistent read images and transport same blocks to remote node across Oracle Real Application Clusters (RAC). Wait event ggc cr multi block request reflects problem of transporting data across to nodes in cluster specially when found mode CPU consume and mode network busy during operations.For more details kindly download document called Performance and Tuning of Oracle RAC databases-1from our website as per following