The Sync Service exposes a collection of metrics that are useful in managing the Sync Service. These metrics can be accessed using JMX (see bean metrics) or a REST call:
GET https://localhost:9090/alfresco/api/-default-/private/alfresco/versions/1/metrics
The response is JSON and contains all the metrics collected by the Sync Service. In particular:
| Metric Name | Type | Description |
| nodeEventLag | Timer | Specifies the time taken for events sent by the repository to be consumed by the Sync Service. It is measured in milliseconds. Note: Timer measures the rate that a particular piece of code is called and the distribution of its duration. See Timers. |
| nodeEventsBrokerTime | Timer | Specifies the amount of time the event spends in the (ActiveMQ) broker. |
| nodeEventBrokerLag | Timer | Specifies the lag between events being sent to the (ActiveMQ) broker by the repository and the time at which the broker receives the event. |
| nodeEventConsumerLag | Timer | Specifies the lag between the broker sending out events and the Sync Service consuming them. |
| lagBetweenEventCreateAndSend | Timer | Specifies the lag between the event creation time and the time the event is sent to the (ActiveMQ) broker. |
| syncsTimedOut | Meter | Specifies the syncs that have timed out (possibly due to long query times). Note: Meter measures the rate of events over time, for example, requests per seconds. See Meters. |
| syncFailuresMeter | Meter | Specifies the sync failures. |
| syncsTimer | Timer | Specifies the distribution of sync times. |
| timePerCommit | Timer | Specifies the node event database commit times. |
| timePerEventUpdate | Timer | Specifies the node event database insert times. |
| timePerGetChanges | Timer | Specifies the sync query times. |
| numActiveClusterMembers | Gauge | Number of active Sync Service cluster members. Note: Gauge is an instantaneous measurement of a value. See Gauges. |