http://docs.aws.amazon.com/elasticsearch-service/latest/developerguide/es-managedomains.html
To prevent overloading a dedicated master node, you can monitor usage with the Amazon CloudWatch metrics that are shown in the following table. Use a larger instance type for dedicated master nodes when these metrics reach their respective maximum values.
FreeStorageSpace (Minimum) | Specifies the free space, in megabytes, for the single data node with the least available free space in a cluster. Amazon ES throws a ClusterBlockException when this metric reaches 0 . To recover, you must either delete indices, add larger instances, or add EBS-based storage to existing instances. For more information, see Recovering from a Lack of Free Storage Space.
Relevant statistics: Minimum
|
CloudWatch Metric | Guideline |
MasterCPUUtilization | Measures the percentage utilization of the CPU for the dedicated master nodes. We recommend increasing the size of the instance type when this metric exceeds 40% with a domain status of Active and exceeds 60% with a domain status of Processing. |
MasterJVMMemoryPressure | Measures the percentage utilization of the JVM memory for the dedicated master nodes. We recommend increasing the size of the instance type when this metric exceeds 60% with a domain status of Active and exceeds 85% with a domain status of Processing. |