For example, when a session on an instance is looking for a . Lost blocks due to Interconnect or CPU. GC cr grants congested. Cluster wait events are caused by multiple nodes in the cluster needing access to the same set of data.
RAC Performance Tuning. These must be tracked down on an individual basis. Real Application Clusters Administration and Deployment Guide》.
Hot Blocks - multiple . Detecting Right Growing Index (RGI) Performance Issues. Events that are associated with all such waits are known as wait events. Following are the top wait events associated with CR mode transfers:. Problem Description: Database version: 11.
Foreground wait events. Time breakdown statistics. Background wait events. Performance Analyst reports on historical and current wait events at the session level . They are composed of Memory.
What are the causes for those wait event and how you can. We are facing performance issues in RAC. Basically the waiting session is not able to pin a block, and will wait on this event until it can pin the block.
Oracle documentation says:. Analyzing and interpreting what causes sessions to wait . V$SYSSTAT, V$ SESSTAT (join to V$STATNAME). The presence of this event in the Top list indicated that the. I tried to get a call stack trace only for this wait event in a separate.