# HStream Metrics
Table of metrics, and for usage, please refer to Monitoring chapter.
Note: For metrics with intervals, such as stats in categories like stream and subscription, users can specify intervals (default intervals [1min, 5min, 10min]). The smaller the interval, the closer it gets to the rate in real-time.
|stream_counter||append_total||#||Total number of append requests of a stream|
|append_failed||#||Total number of failed append request of a stream|
|stream||append_in_bytes||B/s||Rate of bytes received and successfully written to the stream.|
|append_in_records||#/s||Rate of records received and successfully written to the stream|
|append_in_requests||#/s (QPS)||Rate of append requests received per stream|
|append_failed_requests||#/s (QPS)||Rate of failed append requests received per stream|
|subscription_counter||resend_records||#||Total number of resent records per subscription|
|subscription||send_out_bytes||B/s||Rate of bytes sent by the server per subscription|
|acks / acknowledgements||#/s||Rate of acknowledgements received per subscription|
|request_messages||#/s||Rate of requests received from clients per subcription|
|response_messages||#/s||Rate of response sent to clients per subscription|