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 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.
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"
}
}