IIS application_pool metricset

This is the application_pool metricset of the module iis.

This metricset allows users to retrieve relevant metrics for the application pools running on IIS.

Metric values are divided in several groups:

The process object contains System/Process counters like the overall server and CPU usage for the IIS Worker Process and memory (currently used and available memory for the IIS Worker Process).

The net_clr object which returns ASP.NET error rate counter values. Users can specify the application pools they would like to monitor using the configuration option application_pool.name, else, all application pools are considered.

Dashboard

metricbeat iis application pool overview

Fields

For a description of each field in the metricset, see the exported fields section.

Here is an example document generated by this metricset:

{
    "@timestamp": "2026-01-31T00:26:10.412Z",
    "event": {
        "dataset": "iis.application_pool",
        "module": "iis",
        "duration": 32222100
    },
    "iis": {
        "application_pool": {
            "name": "DefaultAppPool",
            "process": {
                "working_set": 19296256,
                "virtual_bytes": 2203429777408,
                "page_faults_per_sec": 0,
                "io_write_operations_per_sec": 0.500673761687841,
                "private_bytes": 6021120,
                "thread_count": 22,
                "handle_count": 239,
                "cpu_usage_perc": 1.5646088737165276,
                "io_read_operations_per_sec": 0.500673761687841
            },
            "host": {
                "cpu": {
                    "count": 16
                }
            }
        }
    },
    "metricset": {
        "name": "application_pool",
        "period": 10000
    },
    "process": {
        "pid": 24056
    },
    "service": {
        "type": "iis"
    }
}