How can I increase the performance of my RabbitMQ?
Part 2: RabbitMQ Best Practices for High Throughput (High Throughput)
- Keep your tail short (if possible)
- Set a maximum queue length if necessary.
- Remove the policy for lazy queues.
- Use transient messages.
- Use multiple queues and consumers.
- Split your tails into different nuclei.
- Disable manual acknowledgments and post confirmations.
Table of Contents
What happens if a message queue fails?
When a subscriber is unable to process a message, it can send it for retry, send it to a failed exchange, or discard it. Messages that are sent for a retry are sent to an exchange/backoff queue where it waits for the length of time the subscriber has dictated, and then is returned to the consumer’s queue.
Is the RabbitMQ queue persistent?
Persistent messages will be written to disk as soon as they hit the queue, while transient messages will be written to disk only so they can be evicted from memory while under memory pressure. Tail mirroring is an “upper layer” persistence.
What happens when the dead-letter queue is full?
In some implementations of IBM® MQ, the dead-letter queue is called the dead-letter queue. When this occurs on a message source node and the local transmission queue is full, the application PUT fails. …
What happens when the MQ queue is full?
In IBM® MQ applications, queues must not be filled. If they do, applications can no longer put messages on the queue they specify. Although the message is not lost if this occurs, a full queue can cause considerable inconvenience. Divert some messages to another queue.
How do I make my RabbitMQ queue persistent?
Create a durable queue by specifying durable as true during your queue creation. You can check in the RabbitMQ admin UI under the queue tab that the queue is marked with a “D” to make sure the queue is durable.
How are queues ordered and served in RabbitMQ?
Queues in RabbitMQ are ordered collections of messages. Messages are queued and dequeued (delivered to consumers) on a FIFO basis.
What happens to the expiration time of a RabbitMQ message?
The original expiration time of a message is preserved if it is requeued (for example, due to the use of an AMQP method that presents a queue parameter, or due to a channel being closed). Setting the TTL to 0 causes messages to expire on arrival at a queue, unless they can be delivered to a consumer immediately.
Message brokers are key here because they provide a point of contact or interface between the producing and consuming application or process. In a real life scenario, we can harness the powers of RabbitMQ by defining a queue (usually a string), sending messages to the predefined queue through an exchange, and then consuming messages from them.
Is there a way to delay a message in RabbitMQ?
Both solutions are valid, but the second solution is relatively simple compared to solutions based on Dead Letter Exchanges and TTL messages. The RabbitMQ delayed message plugins add a new exchange type to RabbitMQ that will store messages internally, using Mnesia, until they are scheduled for delivery.
