Reference of the metrics that each Feast component exports:
For how to configure Feast to export Metrics, see the Metrics user guide.
Exported Metrics
Feast Core exports the following metrics:
| Metrics | Description | Tags |
|---|---|---|
feast_core_request_latency_seconds |
Feast Core's latency in serving Requests in Seconds. | service, method, status_code |
feast_core_feature_set_total |
No. of Feature Sets registered with Feast Core. | None |
feast_core_store_total |
No. of Stores registered with Feast Core. | None |
feast_core_max_memory_bytes |
Max amount of memory the Java virtual machine will attempt to use. | None |
feast_core_total_memory_bytes |
Total amount of memory in the Java virtual machine | None |
feast_core_free_memory_bytes |
Total amount of free memory in the Java virtual machine. | None |
feast_core_gc_collection_seconds |
Time spent in a given JVM garbage collector in seconds. | None |
Metric Tags
Exported Feast Core metrics may be filtered by the following tags/keys
| Tag | Description |
|---|---|
service |
Name of the Service that request is made to. Should be set to CoreService |
method |
Name of the Method that the request is calling. (ie ListFeatureSets) |
status_code |
Status code returned as a result of handling the requests (ie OK). Can be used to find request failures. |
Exported Metrics
Feast Serving exports the following metrics:
| Metric | Description | Tags |
|---|---|---|
feast_serving_request_latency_seconds |
Feast Serving's latency in serving Requests in Seconds. | method |
feast_serving_request_feature_count |
No. of requests retrieving a Feature from Feast Serving. | project, feature_name |
feast_serving_not_found_feature_count |
No. of requests retrieving a Feature has resulted in a NOT_FOUND field status. |
project, feature_name |
feast_serving_stale_feature_count |
No. of requests retrieving a Feature resulted in a OUTSIDE_MAX_AGE field status. |
project, feature_name |
feast_serving_grpc_request_count |
Total gRPC requests served. | method |
Metric Tags
Exported Feast Serving metrics may be filtered by the following tags/keys
| Tag | Description |
|---|---|
method |
Name of the Method that the request is calling. (ie ListFeatureSets) |
status_code |
Status code returned as a result of handling the requests (ie OK). Can be used to find request failures. |
project |
Name of the project that the FeatureSet of the Feature retrieved belongs to. |
feature_name |
Name of the Feature being retrieved. |
Feast Ingestion computes both metrics an statistics on data ingestion. Make sure you familar with data ingestion concepts before proceeding.
{% hint style="info" %} For documentation on Feature value statistics computed by the Ingestion Job see Statistics {% endhint %}
Metrics Namespace
Metrics are computed at two stages of the Feature Row's/Feature Value's life cycle when being processed by the Ingestion Job:
Inflight- Prior to writing data to stores, but after successful validation of data.WriteToStoreSucess- After a successful store write.
Metrics processed by each staged will be tagged with metrics_namespace to the stage where the metric was computed.
Metrics Bucketing
Metrics with a {BUCKET} are computed on a 60 second window/bucket. Suffix with the following to select the bucket to use:
min- minimum value.max- maximum value.mean- mean value.percentile_90- 90 percentile.percentile_95- 95 percentile.percentile_99- 99 percentile.
Exported Metrics
| Metric | Description | Tags |
|---|---|---|
feast_ingestion_feature_row_lag_ms_{BUCKET}
|
Lag time in milliseconds between succeeding ingested Feature Rows. |
|
feast_ingestion_feature_value_lag_ms_{BUCKET}
|
Lag time in milliseconds between succeeding ingested values for each Feature. |
|
feast_ingestion_feature_value_{BUCKET}
|
Last value feature for each Feature. | feast_store, feature_project_name, feast_feature_name,feast_featureSet_name, ingest_job_name, metrics_namepace
|
feast_ingestion_feature_row_ingested_count
|
No. of Ingested Feature Rows |
|
feast_ingestion_feature_value_missing_count
|
No. of times a ingested Feature values did not provide a value for the Feature. |
|
feast_ingestion_deadletter_row_count
|
No. of Feature Rows that that the Ingestion Job did not successfully write to store. | feast_store, feast_project_name,feast_featureSet_name,ingestion_job_name
|
Metric Tags
Exported Feast Ingestion Job metrics may be filtered by the following tags/keys
| Tag | Description |
|---|---|
feast_store |
Name of the target store the Ingestion Job is writing to. |
feast_project_name |
Name of the project that the ingested FeatureSet belongs to. |
feast_featureSet_name |
Name of the Feature Set being ingested. |
feast_feature_name |
Name of the Feature being ingested. |
ingestion_job_name |
Name of the Ingestion Job performing data ingestion. Typically this is set to the Id of the Ingestion Job. |
metrics_namespace |
Stage where metrics where computed. Either Inflight or WriteToStoreSuccess |