# 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.

Category
Metrics
Unit
Description
stream_counterappend_total
#
Total number of append requests of a stream
append_failed#
Total number of failed append request of a stream
append_in_bytes#
Total payload bytes successfully written to the stream
append_in_records#
Total payload records successfully written to the stream
streamappend_in_bytesB/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_countersend_out_bytes#Number of bytes sent by the server per subscription
send_out_records#Number of records successfully sent by the server per subscription
send_out_records_failed#Number of records failed to send by the server per subscription
resend_records#Number of successfully resent records per subscription
resend_records_failed#Number of records failed to resend per subscription
received_acks#Number of acknowledgements received per subscription
request_messages#Number of streaming fetch requests received from clients per subscription
response_messages#Number of streaming send requests successfully sent to clients per subscription, including resends
subscriptionsend_out_bytesB/sRate of bytes sent by the server per subscription
acks / acknowledgements
#/sRate of acknowledgements received per subscription
request_messages#/sRate of streaming fetch requests received from clients per subscription
response_messages#/sRate of streaming send requests successfully sent to clients per subscription, including resends