Reference
max_outstanding_catchup
Max in-flight bytes for stream catch-up. This was introduced to control how much bandwidth should be dedicated during catch-up to guard against saturating and degrading performance of the network.
- Default value: 
32M - Hot reloadable: Yes
 
Values
| Type | Description | Choices | 
|---|---|---|
storage | Size in bytes or string with a metric unit such as 100K, 50M, 3G, or 1T. | - |