# Elemental Inference performance metrics
<a name="inference-metrics-performance"></a>

## GetMetadata request count
<a name="inference-metrics-getmetadata-count"></a>

The number of GetMetadata API requests made to retrieve metadata. 

**Details**
+ Name: GetMetadataRequestCount
+ Supported dimension sets:
  + Feed
  + Feed, StatusCode: to monitor API requests that result in a specific category HTTP response codes.
+ Recommended statistic: Sum
+ Units: Count
+ Meaning of zero: This metric will never emit zero.
+ Meaning of no datapoints: There were no GetMetadata API calls on the specified feed.

## Processing fault count
<a name="inference-metrics-processing-fault"></a>

The total number of processing failures.

**Details**
+ Name: ProcessingFaultCount
+ Supported dimension sets: Feed
+ Recommended statistic: Sum
+ Units: Count
+ Meaning of zero: All video segments submitted to the feed were processed successfully without any failures.
+ Meaning of no datapoints: No video segments were submitted. (PutMedia hasn’t been called.) 

## Processing latency
<a name="inference-metrics-processing-latency"></a>

The end-to-end time from when a video segment is submitted using PutMedia until the metadata is available to be retrieved using GetMetadata.

**Details**

Name: ProcessingLatency

Supported dimension sets:
+ Feed
+ Feed, Feature

Recommended statistics: p50, p95, p99, Average

Units: Milliseconds

Meaning of zero: There is probably an issue with the source media. For example, if the timestamp is wrong, it’s possible that the latency will seem to be 0. 

Meaning of no datapoints: No video segments were submitted (PutMedia hasn’t been called.)

## PutMedia request count
<a name="inference-metrics-putmedia-count"></a>

The number of PutMedia API requests made to submit video segments for processing.

**Details**
+ Name: PutMediaRequestCount
+ Supported dimension sets:
  + Feed, 
  + Feed, StatusCode: to monitor API requests that result in a specific category HTTP response codes.

  Recommended statistic: Sum
+ Units: Count
+ Meaning of zero: This metric will never emit zero.
+ Meaning of no datapoints: There were no PutMedia API calls on the specified feed.