This value determines the percentage of total disk space that can be taken up by the event store before cleanup is triggered.

Default: 90

The total disk space that is available to the event store is calculated as the sum of the current event store size and free disk space. When the threshold is reached, the oldest partition is either unmounted (converted to cold) or deleted from disk, based on value of AlwaysDeleteColdPartitions.

Note: The default was raised to 90 (percent) in version 6.1. Beginning with version 6.1, the behavior of the parameter is affected by the AlwaysDeleteColdPartitions parameter.