Cloud Monitor (recommended)

Step 1: Create a service linked role

When you use the monitoring and alerting feature provided by Cloud Monitor for the first time, Message Queue for Apache RocketMQ automatically creates the service linked role AliyunServiceRoleForOns for you to access cloud resources of Cloud Monitor. For more information about the service linked role for Message Queue for Apache RocketMQ, see Service linked role for.

1. Log on to the Message Queue for Apache RocketMQ console.
2. In the top navigation bar, select the target region.
3. On the Instances page, find the target instance and click Details in the Actions column.
4. In the left-side navigation pane, click Monitoring and Alerts (Recommended).
5. In the Service Linked Role dialog box, click OK.
   

Step 2: View monitoring report information

1. Log on to the Message Queue for Apache RocketMQ console.
2. In the top navigation bar, select the target region.
3. On the Instances page, find the target instance and click Details in the Actions column.
4. In the left-side navigation pane, click Monitoring and Alerts (Recommended), and select the resource whose monitoring data you want to view.
   

   • To view the alert information of an instance, choose Instance > Monitoring Statistics, as shown in the following figure.
     Note

     MessageRetentionPeriod

     This metric indicates the maximum retention period of all messages in the current cluster. It is available only in Enterprise Platinum Edition instances. To ensure the continuous availability of Message Queue for Apache RocketMQ, when the disk space occupied has reached the disk capacity specification of your Enterprise Platinum Edition instance, Message Queue for Apache RocketMQ deletes the messages with the earliest storage time in the first-in-first-out (FIFO) order.

     You can use this metric to measure the capacity of your Enterprise Platinum Edition instance, and the results are to be taken into account of when you upgrade or downgrade the capacity of your Enterprise Platinum Edition instance.

     The horizontal axis represents the time point, and the vertical axis represents the message retention period. For example, the time point on the horizontal axis is 21:00, and the corresponding value on the vertical axis is 10, which means that the message retention period of the Enterprise Platinum Edition instance is 10 hours at 21:00. If you want to retain these messages for a longer period, you must expand the capacity of the disk.

   • To view the alert information under a topic, choose Topic > Monitoring Statistics, as shown in the following figure.
   • To view the alert information under a group ID, choose Group > Monitoring Statistics, as shown in the following figure.
     Note

     ConsumerLag(unit)

     This metric indicates the number of accumulated messages under the group ID. For more information, see Terms.

You can view the data of the last 1 hour, 3 hours, 6 hours, 12 hours, 1 day, 3 days, 7 days, or 14 days, or click the rightmost time picker to customize a time range.

If you want to customize a time range, you can view data of up to the last 31 days. Data generated prior to the last 31 days is not retained. That is, if the end time in the time picker is the current system time, the earliest start time can be 31 days prior to the current date. If the end time is not the current system time, you can view data of up to 7 consecutive days within the last 31 days.

Step 3: Set alert rules

1. Log on to the Message Queue for Apache RocketMQ console.
2. In the top navigation bar, select the target region.
3. On the Instances page, find the target instance and click Details in the Actions column.
4. In the left-side navigation pane, click Monitoring and Alerts (Recommended), and select the resource whose monitoring data you want to view.
5. Find the target resource and click Set Alerts in the Actions column.
6. On the Create Alarm Rule page, set the alert rule and notification method. For more information, see Create a threshold-triggered alert rule.
   

   Note To receive SMS notifications, log on to the Cloud Monitor console. On the Overview page, click Purchase SMS to purchase the SMS service.

   The following table lists the Message Queue for Apache RocketMQ monitoring items.

   Metric	Unit	Metric	Dimensions	Statistics
   ConsumerLag	count	ConsumerLag	userId, instanceId, and groupId	Sum
   ConsumerLagPerGidTopic	count	ConsumerLagPerGidTopic	userId, instanceId, groupId, and topic	Sum
   MessageRetentionPeriod	hour	MessageRetentionPeriod	userId and instanceId	Minimum
   ReceiveMessageCountPerGid	count/min	ReceiveMessageCountPerGid	userId, instanceId, and groupId	Sum
   ReceiveMessageCountPerGidTopic	count/min	ReceiveMessageCountPerGidTopic	userId, instanceId, topic, and groupId	Sum
   Number of messages received by an instance per minute.	count/min	ReceiveMessageCountPerInstance	userId and instanceId	Sum
   ReceiveMessageCountPerTopic	count/min	ReceiveMessageCountPerTopic	userId, instanceId, and topic	Sum
   SendDLQMessageCountPerGid	count/min	SendDLQMessageCountPerGid	userId, instanceId, and groupId	Sum
   SendDLQMessageCountPerGidTopic	count/min	SendDLQMessageCountPerGidTopic	userId, instanceId, groupId, and topic	Sum
   SendMessageCountPerGid	count/min	SendMessageCountPerGid	userId, instanceId, and groupId	Sum
   SendMessageCountPerGidTopic	count/min	SendMessageCountPerGidTopic	userId, instanceId, topic, and groupId	Sum
   SendMessageCountPerInstance	count/min	SendMessageCountPerInstance	userId and instanceId	Sum
   SendMessageCountPerTopic	count/min	SendMessageCountPerTopic	userId, instanceId, and topic	Sum

   On the Alert Rule Configuration tab of the corresponding resource, you can view the created alert rule information.