serviceMetrics.enabled
serviceMetricsEventListener.maxPoolSize

Create a policy with the following properties:
Policy Type:
Policy-Backed Service Operation Policy Fragment
Policy Tag:
com.l7tech.external.assertions.pbsmel.server.ServiceMetricsProcessor
Action:
process
This action creates a backing policy that is assigned to a policy-backed service. In the policy window, the context variable metrics is the single input to the policy-backed operation.
Craft a backing policy to manipulate the metrics data according to your needs.
Design your backing policy to be as efficient as possible, as it is called once for each request that is processed by the Gateway.
Run the Manage Policy-Backed Services task.
Click
Create
and enter a name for your policy-backed service.
In the
Type
drop-down list, select
com.l7tech.external.assertions.pbsmel.server.ServiceMetricsProcessor
.
Select the line that appears in the table and click
Assign
. Then select the policy that you created in step 1.

{  "time" : 1518734278251,
   "formattedTime" : "2018-02-15T14:37:58.251-08:00",
   "nodeId" : "48b5a4bc60fd4db191ddd5258eab0a35",
   "nodeName" : "Gateway1",
   "nodeIp" : "10.242.45.121",
   "serviceId" : "13df5d4767ea633273940598aa2f323c",
   "serviceName" : "Test Service 1",
   "serviceUri" : "/test1",
   "totalFrontendLatency" : 234,
   "totalBackendLatency" : 123,
   "isPolicySuccessful": true,
   "isPolicyViolation" : false,
   "isRoutingFailure" : false
}