# Monitor metrics
<a name="apache-iceberg-metric"></a>

For data delivery to Apache Iceberg Tables, Firehose emits the following CloudWatch metrics at a stream level.


| Metric | Description | 
| --- | --- | 
| DeliveryToIceberg.Bytes | The number of bytes delivered to Apache Iceberg Tables over the specified time period.<br />Units: Bytes | 
| DeliveryToIceberg.IncomingRowCount | Number of records that Firehose attempts to deliver to Apache Iceberg Tables. <br />Units: Count | 
| DeliveryToIceberg.SuccessfulRowCount | Number of successful rows delivered to Apache Iceberg Tables.<br />Units: Count | 
| DeliveryToIceberg.FailedRowCount | Number of failed rows delivered to S3 backup bucket.<br />Units: Count | 
| DeliveryToIceberg.DataFreshness | The age (from getting into Firehose to now) of the earliest record in Firehose. Any record earlier than this age has been delivered to Apache Iceberg Tables.Units: Seconds | 
| DeliveryToIceberg.Success | Sum of successful commits to Apache Iceberg Tables. | 
| JQProcessing.Duration | The amount of time it took to run the JQ expression.Units: Milliseconds |