DMS for RocketMQ Metrics

Introduction

This section describes the metrics that DMS for RocketMQ reports to Cloud Eye. You can view metrics and alarms by using the DMS for RocketMQ console.

Namespace

SYS.DMS

Instance Metrics

**Table 1** Instance metrics
Metric ID	Metric Name	Description	Value Range	Unit	Conversion Rule	Dimension	Monitoring Period (Raw Data)
instance_produce_msg	Created Messages	Number of messages received by the instance per minute	> 0	Count	N/A	reliablemq_instance_id	1 minute
instance_consume_msg	Retrieved Messages	Number of messages retrieved from the instance per minute	> 0	Count	N/A	reliablemq_instance_id	1 minute
current_topics	Topics	Number of topics in the instance NOTE: This metric is supported for instances purchased on or after May 16, 2022.	≥ 0	Count	N/A	reliablemq_instance_id	1 minute
current_queues	Queues	Number of queues in the instance	≥ 0	Count	N/A	reliablemq_instance_id	1 minute
instance_accumulation	Accumulated Messages	Total number of messages accumulated in all consumer groups of the instance	≥ 0	Count	N/A	reliablemq_instance_id	1 minute
instance_produce_scheduled_msg	Scheduled Messages Created	Number of scheduled messages received by the instance per minute	≥ 0	Count	N/A	reliablemq_instance_id	1 minute
instance_retention_period	Instance Message Retention Period	Message retention period of the instance	≥ 0	Hour	N/A	reliablemq_instance_id	1 minute
instance_disk_usage	Instance Disk Usage	Disk usage of the instance	≥ 0	%	N/A	reliablemq_instance_id	1 minute
instance_produce_rate	Instance Creation Rate	Creation rate of the instance	≥ 0	Count/s	N/A	reliablemq_instance_id	1 minute
instance_consume_rate	Instance Retrieval Rate	Retrieval rate of the instance	≥ 0	Count/s	N/A	reliablemq_instance_id	1 minute
instance_produce_rate_for_ratelimit	Converted Production TPS	Production TPS converted by message size and type, for rate limiting NOTE: Available only for RocketMQ 5.x instances.	≥ 0	Count/s	N/A	reliablemq_instance_id	1 minute
instance_consume_rate_for_ratelimit	Converted Consumption TPS	Consumption TPS converted by message size and type, for rate limiting NOTE: Available only for RocketMQ 5.x instances.	≥ 0	Count/s	N/A	reliablemq_instance_id	1 minute
instance_produce_ratelimit_percentage	Proportion of Production TPS	Proportion of production TPS limit that is converted NOTE: Available only for RocketMQ 5.x instances.	≥ 0	%	N/A	reliablemq_instance_id	1 minute
instance_consume_ratelimit_percentage	Proportion of Consumption TPS	Proportion of consumption TPS limit that is converted NOTE: Available only for RocketMQ 5.x instances.	≥ 0	%	N/A	reliablemq_instance_id	1 minute
instance_produce_ratelimit_times	Production Rate Limits	Number of production rate limit occurrences in one minute NOTE: Available only for RocketMQ 5.x instances.	≥ 0	Count	N/A	reliablemq_instance_id	1 minute
instance_consume_ratelimit_times	Consumption Rate Limits	Number of consumption rate limit occurrences in one minute NOTE: Available only for RocketMQ 5.x instances.	≥ 0	Count	N/A	reliablemq_instance_id	1 minute

Broker Metrics

Available for RocketMQ 4.8.0 instances.

**Table 2** Broker metrics
Metric ID	Metric Name	Description	Value Range	Unit	Conversion Rule	Dimension	Monitoring Period (Raw Data)
broker_produce_msg	Created Messages	Number of messages received by the broker per minute	> 0	Count	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_consume_msg	Retrieved Messages	Number of messages retrieved from the broker per minute	> 0	Count	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_produce_rate	Message Creation Rate	Number of messages received by the broker per second	> 0	Count/s	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_consume_rate	Message Retrieval Rate	Number of messages retrieved from the broker per second	> 0	Count/s	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_total_bytes_in_rate	Inbound Traffic	Inbound traffic to the broker per second	> 0	Byte/s	1024(IEC)	reliablemq_instance_id,reliablemq_broker	1 minute
broker_total_bytes_out_rate	Outbound Traffic	Outbound traffic from the broker per second	> 0	Byte/s	1024(IEC)	reliablemq_instance_id,reliablemq_broker	1 minute
broker_cpu_core_load	Average Load per CPU Core	Average load of each CPU core in the broker VM	> 0	N/A	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_disk_usage	Disk Capacity Usage	Disk usage of the broker VM	0–100	%	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_memory_usage	Memory Usage	Memory usage of the broker VM	0–100	%	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_alive	Broker Status	Indicates whether the broker is alive.	1: alive 0: not alive	N/A	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_connections	Connections	Number of connections used by the VM	≥ 0	Count	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_cpu_usage	CPU Usage	CPU usage on the VM	≥ 0	%	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_disk_read_await	Average Disk Read Time	Average time for each disk I/O read	≥ 0	ms	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_disk_write_await	Average Disk Write Time	Average time for each disk I/O write	≥ 0	ms	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_produce_p99	Message Creation Processing (99th Percentile)	The 99th percentile of time taken to process all creation requests, in ascending order	≥ 0	ms	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_produce_p999	Message Creation Processing (99.9th Percentile)	The 99.9th percentile of time taken to process all creation requests, in ascending order	≥ 0	ms	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_retention_period	Message Retention Period	How long ago the earliest message was saved on the broker	≥ 0	Hours	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_produce_success_rate	Creation Success Rate	Percentage of creations that were successfully requested on the broker	≥ 0	%	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_produce_scheduled_msg	Scheduled Messages Created per Minute	Number of scheduled messages created on the broker per minute	≥ 0	Count	N/A	reliablemq_instance_id,reliablemq_broker	1 minute
broker_disk_read_rate	Disk Read Speed	Read traffic on the disk	≥ 0	Byte/s	1024(IEC)	reliablemq_instance_id,reliablemq_broker	1 minute
broker_disk_write_rate	Disk Write Speed	Write traffic on the disk	≥ 0	Byte/s	1024(IEC)	reliablemq_instance_id,reliablemq_broker	1 minute

Topic Metrics

**Table 3** Topic metrics
Metric ID	Metric Name	Description	Value Range	Unit	Conversion Rule	Dimension	Monitoring Period (Raw Data)
topic_produce_msg	Created Messages	Number of messages received by the topic per minute	> 0	Count	N/A	reliablemq_instance_id,reliablemq_topics	1 minute
topic_consume_msg	Retrieved Messages	Number of messages retrieved from the topic per minute	> 0	Count	N/A	reliablemq_instance_id,reliablemq_topics	1 minute
topic_produce_rate	Message Creation Rate	Number of messages received by the topic per second	> 0	Count/s	N/A	reliablemq_instance_id,reliablemq_topics	1 minute
topic_consume_rate	Message Retrieval Rate	Number of messages retrieved from the topic per second	> 0	Count/s	N/A	reliablemq_instance_id,reliablemq_topics	1 minute
topic_bytes_in_rate	Message Creation	Message creation traffic of the topic	≥ 0	Byte/s	1024(IEC)	reliablemq_instance_id,reliablemq_topics	1 minute
topic_bytes_out_rate	Message Retrieval	Message retrieval traffic of the topic	≥ 0	Byte/s	1024(IEC)	reliablemq_instance_id,reliablemq_topics	1 minute

Consumer Group Metrics

**Table 4** Consumer group metrics
Metric ID	Metric Name	Description	Value Range	Unit	Conversion Rule	Dimension	Monitoring Period (Raw Data)
group_consume_msg	Retrieved Messages	Number of messages retrieved by the consumer group per minute NOTE: This metric is available only when Topic is set to All topics on the By Consumer Group tab page.	> 0	Count	N/A	reliablemq_instance_id,reliablemq_groups	1 minute
group_accumulation	Available Messages	Number of messages accumulated in the consumer group Unit: count NOTE: This metric is available only when Topic is set to All topics on the By Consumer Group tab page.	> 0	Count	N/A	reliablemq_instance_id,reliablemq_groups	1 minute
group_topic_consume_msg	Retrieved Messages	Number of messages in the specified topic that are retrieved by the consumer group per minute NOTE: This metric is available only when Topic is set to a specified topic on the By Consumer Group tab page.	> 0	Count	N/A	reliablemq_instance_id,reliablemq_groups,reliablemq_groups_topics	1 minute
group_topic_consume_rate	Message Retrieval Rate	Number of messages in the specified topic that are retrieved by the consumer group per second NOTE: This metric is available only when Topic is set to a specified topic on the By Consumer Group tab page.	> 0	Count/s	N/A	reliablemq_instance_id,reliablemq_groups,reliablemq_groups_topics	1 minute
group_topic_accumulation	Available Messages	Number of messages in a specific topic NOTE: This metric is available only when Topic is set to a specified topic on the By Consumer Group tab page.	> 0	Count	N/A	reliablemq_instance_id,reliablemq_groups,reliablemq_groups_topics	1 minute

Dead Letter Queue Metrics

**Table 5** Dead letter queue metrics
Metric ID	Metric Name	Description	Value Range	Unit	Conversion Rule	Monitored Object (Dimension)	Monitoring Period (Raw Data)
dlq_accumulation	Messages in the Dead Letter Queue	Number of messages in the dead letter queue	≥ 0	Count	N/A	reliablemq_instance_id,reliablemq_dlq_topics	1 minute

If a monitored object has multiple dimensions, the dimensional level of specific metrics is required when you use APIs to query the metrics.

For example, to query the number of accumulated messages (group_accumulation) of a consumer group, its dimension is "reliablemq_instance_id,reliablemq_groups", indicating that reliablemq_instance_id is numbered 0 and reliablemq_groups is numbered 1.

To query a single metric by calling the API, the reliablemq_groups dimension is used as follows:
```
dim.0=reliablemq_instance_id,6a0df74a-fxxx-497bfdda6c8e&dim.1=reliablemq_groups,10
```
6a0df74a-fxxx-497bfdda6c8e and 10 are the dimension values of reliablemq_instance_id and reliablemq_groups. For details about how to obtain them, see the guide in the Dimension table.

To batch query metrics by calling the API, the reliablemq_groups dimension is used as follows:

"dimensions": [ 
                 { 
                     "name": "reliablemq_instance_id", 
                     "value": "6a0df74a-fxxx-497bfdda6c8e"    
                 }, 
                 { 
                     "name": "reliablemq_groups", 
                     "value": "10" 
                 } 
             ]

6a0df74a-fxxx-497bfdda6c8e and 10 are the dimension values of reliablemq_instance_id and reliablemq_groups. For details about how to obtain them, see the guide in the Dimension table.

Dimensions

Key	Value
reliablemq_instance_id	RocketMQ instance ID, for example, 6a0df74a-fxxx-497bfdda6c8e. To obtain the value, call the Listing All Instances API and extract the value from the response parameters.
reliablemq_broker	RocketMQ instance broker. The broker ID starts from 0 and increases in ascending order. For example, if an instance has three brokers, they are broker-0, broker-1, and broker-2. To obtain the value, call the Querying Instance Monitoring Dimensions API and extract the value from the response parameters.
reliablemq_topics	Topic name, for example, topic-01. To obtain the value, call the Querying Instance Monitoring Dimensions API and extract the value from the response parameters.
reliablemq_groups	RocketMQ instance consumer group, for example, group-01. To obtain the value, call the Querying Instance Monitoring Dimensions API and extract the value from the response parameters.
reliablemq_groups_topics	Name of the topic consumed, for example, topic-01. To obtain the value, call the Querying Instance Monitoring Dimensions API and extract the value from the response parameters.
reliablemq_dlq_topics	Name of the dead letter queue of the RocketMQ instance, for example, DLQ_group-1. To obtain the value, call the Querying Instance Monitoring Dimensions API and extract the value from the response parameters.