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- Does DMS for RabbitMQ Support Data Persistence? How Do I Perform Scheduled Data Backups?
- How Do I Obtain the Certificate After SSL Has Been Enabled?
- Can I Change the SSL Setting of a RabbitMQ Instance?
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Connections
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User Guide (ME-Abu Dhabi Region)
- Service Overview
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- Process of Using RabbitMQ
- Permissions Management
- Buying a RabbitMQ Instance
- Configuring Virtual Hosts
- Accessing a RabbitMQ Instance
- Managing Messages
- Advanced Features
-
Managing Instances
- Viewing and Modifying Basic Information of a RabbitMQ Instance
- Viewing RabbitMQ Client Connection Addresses
- Managing RabbitMQ Instance Tags
- Resetting the RabbitMQ Instance Password
- Enabling RabbitMQ Plug-ins
- Using the rabbitmq_tracing Plug-in
- Exporting the RabbitMQ Instance List
- Deleting a RabbitMQ Instance
- Logging In to RabbitMQ Management UI
- Modifying RabbitMQ Instance Specifications
- Migrating RabbitMQ Services
- Applying for Increasing RabbitMQ Quotas
- Viewing Metrics and Configuring Alarms
- Viewing RabbitMQ Audit Logs
-
FAQs
-
Instances
- What RabbitMQ Version Does DMS for RabbitMQ Use?
- What SSL Version Does DMS for RabbitMQ Use?
- Why Can't I View the Subnet and Security Group Information During Instance Creation?
- How Are Requests Evenly Distributed to Each VM of a Cluster RabbitMQ Instance?
- Do Queues Inside a Cluster RabbitMQ Instance Have Any Redundancy Backup?
- Does DMS for RabbitMQ Support Data Persistence? How Do I Perform Scheduled Data Backups?
- How Do I Obtain the Certificate After SSL Has Been Enabled?
- Can I Change the SSL Setting of a RabbitMQ Instance?
- Can RabbitMQ Instances Be Scaled Up?
- Does RabbitMQ Support Two-Way Authentication?
- Does DMS for RabbitMQ Support CPU and Memory Upgrades?
- How Do I Disable the RabbitMQ Management UI?
- Can I Change the AZ for an Instance?
- How Do I Obtain the Region ID?
- Why Can't I Select Two AZs?
- How to Change Single-node RabbitMQ Instances to Cluster Ones?
- Can I Change the VPC and Subnet After a RabbitMQ Instance Is Created?
-
Connections
- How Do I Configure a Security Group?
- Why Does a Client Fail to Connect to a RabbitMQ Instance?
- Does DMS for RabbitMQ Support Public Access?
- Does DMS for RabbitMQ Support Cross-Region Deployment?
- Do RabbitMQ Instances Support Cross-VPC Access?
- Do RabbitMQ Instances Support Cross-Subnet Access?
- What Should I Do If I Fail to Access a RabbitMQ Instance with SSL Encryption?
- Can I Access a RabbitMQ Instance Using DNAT?
- Why Can't I Open the Management Web UI?
- Can a Client Connect to Multiple Virtual Hosts of a RabbitMQ Instance?
- Why Does a RabbitMQ Cluster Have Only One Connection Address?
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Instances
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User Guide (Kuala Lumpur Region)
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FAQs
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Instances
- What RabbitMQ Version Does DMS for RabbitMQ Use?
- What SSL Version Does DMS for RabbitMQ Use?
- Why Can't I View the Subnet and Security Group Information During Instance Creation?
- What If One RabbitMQ VM Fails to Be Restarted When a Cluster RabbitMQ Instance Is Being Restarted?
- How Are Requests Evenly Distributed to Each VM of a Cluster RabbitMQ Instance?
- Do Queues Inside a Cluster RabbitMQ Instance Have Any Redundancy Backup?
- Does DMS for RabbitMQ Support Data Persistence? How Do I Perform Scheduled Data Backups?
- How Do I Obtain the Certificate After SSL Has Been Enabled?
- Can I Change the SSL Setting of a RabbitMQ Instance?
- Can RabbitMQ Instances Be Scaled Up?
- Does DMS for RabbitMQ Support MQTT?
- How Do I Clear Queue Data?
- Does DMS for RabbitMQ Support CPU and Memory Upgrades?
- How Do I Disable the RabbitMQ Management UI?
- Can I Change the AZ for an Instance?
-
Connections
- How Do I Configure a Security Group?
- Why Does a Client Fail to Connect to a RabbitMQ Instance?
- Does DMS for RabbitMQ Support Public Access?
- Does DMS for RabbitMQ Support Cross-Region Deployment?
- Does DMS for RabbitMQ Support Cross-VPC Access?
- Does DMS for RabbitMQ Support Cross-Subnet Access?
- What Should I Do If I Fail to Access a RabbitMQ Instance with SSL Encryption?
- Can I Access a RabbitMQ Instance Using DNAT?
- Why Can't I Open the Management Web UI?
- Can a Client Connect to Multiple Virtual Hosts of a RabbitMQ Instance?
- Why Does a RabbitMQ Cluster Have Only One Connection Address?
- Plug-ins
- Messages
- Monitoring & Alarm
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Instances
- Change History
- API Reference (Kuala Lumpur Region)
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User Guide (ME-Abu Dhabi Region)
- General Reference
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Configuring RabbitMQ TTL
TTL (time to live) indicates the expiration time. If a message that has stayed in a queue for longer than the TTL, the message will be discarded. If a dead letter exchange has been configured for the queue, the message will be sent to the dead letter exchange, and then routed to the dead letter queue. For more information about TTL, see TTL.
You can configure TTL for messages and queues. Message TTL can be configured in the following ways:
- Configure a TTL in queue properties: All messages in the queue have the same expiration time.
- Configure a TTL for each message: Each message has a dedicated TTL.
If both methods are used, the smaller TTL value is used.
TTL is a RabbitMQ feature that must be used with caution because it may adversely affect system performance.
Configuring Queue TTL
The x-expires parameter in the channel.queueDeclare argument is used to control how long a queue will remain active after being unused before it is automatically deleted. "Unused" indicates that the queue has no consumer and is not re-declared, and the Basic.Get command is not called before expiration. The value of x-expires must be an integer other than 0, in milliseconds.
The following example shows how to configure a queue TTL on a Java client.
Map<String, Object> args = new HashMap<String, Object>(); args.put("x-expires", 1800000); // Set queue TTL to 1,800,000 ms. channel.queueDeclare("myqueue", false, false, false, args);
Configuring Message TTL
- In the queue configuration
Add the x-message-ttl parameter to the channel.queueDeclare argument. The value must be an integer other than 0, in milliseconds.
The following example shows how to configure a message TTL in queue properties on a Java client.
Map<String,Object> arg = new HashMap<String, Object>(); arg.put("x-message-ttl",6000); // Set queue TTL to 6,000 ms. channel.queueDeclare("normalQueue",true,false,false,arg);
- For a dedicated message
Add the expiration parameter to the channel.basicPublish argument. The value must be an integer other than 0, in milliseconds.
The following example shows how to set a per-message TTL on a Java client.
byte[] messageBodyBytes = "Hello, world!".getBytes(); AMQP.BasicProperties properties = new AMQP.BasicProperties.Builder() .expiration("60000") // Set message TTL to 60,000 ms. .build(); channel.basicPublish("my-exchange", "routing-key", properties, messageBodyBytes);
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