Queue Size Metric Exposed
In versions prior to MarkLogic 11.2, a metric called “queue-size” is collected and stored in the Meters database but it is not exposed via the Monitoring History or the App Server status UIs. This metric represents an internal request queue for each app server and can be a useful metric to understand if requests the system cannot keep up with the incoming request load. This should not be confused with the app server “Backlog” setting though as that controls the socket-level connection backlog which is separate from the internal request queue.
MarkLogic 11.2 exposes the “queue-size” metric in the App Server status UI as the “Queued” column as well as in the Monitoring History UI under the “Servers Detail” as the “Queue Size (HTTP)” metric.
See the Server performance data section of the monitoring history documentation for more information.