👀 Views: 50 💬 Answers: 1 📅 Created: 2025-08-21

spring-boot rabbitmq performance Java

I've been researching this but I'm experiencing high latency in my Spring Boot microservice that processes messages from RabbitMQ. The payloads can sometimes reach up to 5MB, and I've noticed the processing time increases significantly as the payload size increases. I'm using Spring Boot 2.5.4 with RabbitMQ 3.8.9. The messages are being consumed asynchronously using `@RabbitListener`, but the average processing time for larger messages can exceed 3 seconds, which is unacceptable for our use case. Here's a simplified version of my consumer code: ```java @RabbitListener(queues = "myQueue") public void receiveMessage(byte[] message) { try { String json = new String(message, StandardCharsets.UTF_8); // Simulate processing time Thread.sleep(2000); processJson(json); } catch (Exception e) { System.err.println("behavior processing message: " + e.getMessage()); } } ``` I’ve tried increasing the prefetch count using `simpleRabbitListenerContainerFactory.setPrefetchCount(10);` to allow the consumer to fetch multiple messages at once, but it didn’t seem to improve the latency much. I also considered using a message compression strategy to reduce the payload size, but I’m worried about the added complexity and whether it will actually yield a performance gain. Additionally, I'm using a connection pool for the RabbitMQ connections, but I haven't adjusted any parameters yet. Here's how I configured the connection factory: ```java ConnectionFactory factory = new ConnectionFactory(); factory.setHost("localhost"); factory.setPort(5672); factory.setUsername("guest"); factory.setPassword("guest"); return new CachingConnectionFactory(factory); ``` Has anyone faced similar issues? Are there specific configurations or optimizations that could help reduce the processing time for larger payloads? Any suggestions would be greatly appreciated! This issue appeared after updating to Java LTS.