By default, data related to resolved event groups is retained indefinitely. You can set a retention limit to make the system automatically delete resolved event group data after a certain number of days.
You can also limit the amount of memory that event data can occupy on your cluster. By default, the limit is 1 megabyte of memory for every 1 terabyte of total memory on the cluster. You can adjust this limit to be between 1 and 100 megabytes of memory. For smaller clusters, the minimum amount of memory that will be set aside is 1 gigabyte.
When your cluster reaches a storage limit, the system will begin deleting the oldest event group data to accommodate new data.