ora.qosmserver

Resolving Memory Stress

Memory Guard continuously monitors and ensures the availability of cluster nodes by preventing the nodes from being evicted when the nodes are stressed due to lack of memory.

Memory Guard is implemented as a daemon running as an MBean in a J2EE container managed by Cluster Ready Services (CRS).

Memory Guard is hosted on the qosmserver resource that runs on any cluster node for high availability.

Memory Guard Architecture

[grid@caiqidb1 audit]$ srvctl status qosmserver
QoS Management Server is enabled.
QoS Management Server is running on node caiqidb2           

參考手冊：

Autonomous Health Framework User’s Guide

https://docs.oracle.com/en/database/oracle/oracle-database/12.2/atnms/purpose-of-memory-guard.html#GUID-5EBC917F-2810-469D-9DAE-EA6EB2F123D8