---
id: 1deb6a54-b1b4-4c83-a23b-6a546b4a028c
---

# RabbitMQ Queue Backlog Incident
---

A RabbitMQ Queue Backlog Incident refers to a situation where the RabbitMQ message queue is experiencing a backlog of messages. This means that the messages are not being processed as quickly as they are being received, leading to a buildup of messages in the queue. This can cause delays in message delivery and processing, which can impact the performance of applications that rely on RabbitMQ for message passing.

### Parameters
```shell
export CONNECTION_PID="PLACEHOLDER"

export BATCH_SIZE="PLACEHOLDER"

export CONCURRENCY_LEVEL="PLACEHOLDER"

export RABBITMQ_CONFIG_FILE_PATH="PLACEHOLDER"

export PREFETCH_COUNT="PLACEHOLDER"
```

## Debug

### Check RabbitMQ status
```shell
sudo systemctl status rabbitmq-server
```

### Check if the RabbitMQ service is running
```shell
sudo rabbitmqctl status
```

### Check the number of messages in the queue
```shell
sudo rabbitmqctl list_queues name messages_ready messages_unacknowledged
```

### Check the number of connections to RabbitMQ
```shell
sudo rabbitmqctl list_connections
```

### Check the number of channels for each connection
```shell
sudo rabbitmqctl list_channels ${CONNECTION_PID}
```

### Check the number of consumers for each queue
```shell
sudo rabbitmqctl list_consumers
```

### Check the number of exchanges
```shell
sudo rabbitmqctl list_exchanges
```

### Check the number of bindings
```shell
sudo rabbitmqctl list_bindings
```

### Check the number of nodes in the RabbitMQ cluster
```shell
sudo rabbitmqctl cluster_status
```

## Repair

### Tune RabbitMQ configuration - Tweaking the configuration of RabbitMQ based on the specific requirements of your system can help to optimize its performance and reduce the queue backlog issue.
```shell
bash

#!/bin/bash



# Set the RabbitMQ configuration file path

RABBITMQ_CONF="${RABBITMQ_CONFIG_FILE_PATH}"



# Set the configuration parameters to be tuned

PREFETCH_COUNT="${PREFETCH_COUNT}"

BATCH_SIZE="${BATCH_SIZE}"

CONCURRENCY_LEVEL="${CONCURRENCY_LEVEL}"



# Stop the RabbitMQ service

sudo systemctl stop rabbitmq-server



# Update the configuration file with the new parameters

sudo sed -i "s/^prefetch_count = .*/prefetch_count = $PREFETCH_COUNT/" $RABBITMQ_CONF

sudo sed -i "s/^batch_size = .*/batch_size = $BATCH_SIZE/" $RABBITMQ_CONF

sudo sed -i "s/^concurrency = .*/concurrency = $CONCURRENCY_LEVEL/" $RABBITMQ_CONF



# Start the RabbitMQ service

sudo systemctl start rabbitmq-server



echo "RabbitMQ configuration has been tuned successfully."


```

A RabbitMQ Queue Backlog Incident refers to a situation where the RabbitMQ message queue is experiencing a backlog of messages. This means that the messages are not being processed as quickly as they are being received, leading to a buildup of messages in the queue. This can cause delays in message delivery and processing, which can impact the performance of applications that rely on RabbitMQ for message passing.


```shell
export CONNECTION_PID="PLACEHOLDER"

export BATCH_SIZE="PLACEHOLDER"

export CONCURRENCY_LEVEL="PLACEHOLDER"

export RABBITMQ_CONFIG_FILE_PATH="PLACEHOLDER"

export PREFETCH_COUNT="PLACEHOLDER"
```


### Check RabbitMQ status

```shell
sudo systemctl status rabbitmq-server
```

### Check if the RabbitMQ service is running

```shell
sudo rabbitmqctl status
```

### Check the number of messages in the queue

```shell
sudo rabbitmqctl list_queues name messages_ready messages_unacknowledged
```

### Check the number of connections to RabbitMQ

```shell
sudo rabbitmqctl list_connections
```

### Check the number of channels for each connection

```shell
sudo rabbitmqctl list_channels ${CONNECTION_PID}
```

### Check the number of consumers for each queue

```shell
sudo rabbitmqctl list_consumers
```

### Check the number of exchanges

```shell
sudo rabbitmqctl list_exchanges
```

### Check the number of bindings

```shell
sudo rabbitmqctl list_bindings
```

### Check the number of nodes in the RabbitMQ cluster

```shell
sudo rabbitmqctl cluster_status
```


### Tune RabbitMQ configuration - Tweaking the configuration of RabbitMQ based on the specific requirements of your system can help to optimize its performance and reduce the queue backlog issue.

```shell
bash

#!/bin/bash



# Set the RabbitMQ configuration file path

RABBITMQ_CONF="${RABBITMQ_CONFIG_FILE_PATH}"



# Set the configuration parameters to be tuned

PREFETCH_COUNT="${PREFETCH_COUNT}"

BATCH_SIZE="${BATCH_SIZE}"

CONCURRENCY_LEVEL="${CONCURRENCY_LEVEL}"



# Stop the RabbitMQ service

sudo systemctl stop rabbitmq-server



# Update the configuration file with the new parameters

sudo sed -i "s/^prefetch_count = .*/prefetch_count = $PREFETCH_COUNT/" $RABBITMQ_CONF

sudo sed -i "s/^batch_size = .*/batch_size = $BATCH_SIZE/" $RABBITMQ_CONF

sudo sed -i "s/^concurrency = .*/concurrency = $CONCURRENCY_LEVEL/" $RABBITMQ_CONF



# Start the RabbitMQ service

sudo systemctl start rabbitmq-server



echo "RabbitMQ configuration has been tuned successfully."


```


RabbitMQ Queue Backlog Incident

Overview

Parameters

Debug

Check RabbitMQ status

Check if the RabbitMQ service is running

Check the number of messages in the queue

Check the number of connections to RabbitMQ

Check the number of channels for each connection

Check the number of consumers for each queue

Check the number of exchanges

Check the number of bindings

Check the number of nodes in the RabbitMQ cluster

Repair

Tune RabbitMQ configuration - Tweaking the configuration of RabbitMQ based on the specific requirements of your system can help to optimize its performance and reduce the queue backlog issue.

Learn more

Related Runbooks

Support