Used in: packet-delivery.
The flow-control element contains configuration information related to packet throttling and remote GC detection.
Remote Pause detection allows Coherence to detect and react to a cluster node becoming unresponsive (likely due to a long GC). Once a node is marked as paused, packets addressed to it will be sent at a lower rate until the node resumes responding. This remote GC detection is used to avoid flooding a node while it is incapable of responding.
Flow control allows Coherence to dynamically adjust the rate at which packets are transmitted to a given cluster node based on point to point transmission statistics.
The following table describes the elements you can define within the flow-control element.
| Element | Required/Optional | Description |
|---|---|---|
| <enabled> | Optional | Specifies if flow control is enabled. Default is true |
| <pause-detection> | Optional | Defines the number of packets that will be resent to an unresponsive cluster node before assuming that the node is paused. |
| <outstanding-packets> | Optional | Defines the number of unconfirmed packets that will be sent to a cluster node before packets addressed to that node will be deferred. |