Getting number of messages in a RabbitMQ queue
Question:
We’re using amqplib to publish/consume messages. I want to be able to read the number of messages on a queue (ideally both acknowledged and unacknowledged). This will allow me to show a nice status diagram to the admin users and detect if a certain component is not keeping up with the load.
I can’t find any information in the amqplib docs about reading queue status.
Can someone point me in the right direction?
Answers:
Using the Java API, you can do the following :
channel.queueDeclarePassive(queueName).getMessageCount()
I believe this is also available with amqplib (according to https://code.google.com/p/py-amqplib/source/browse/amqplib/client_0_8/channel.py#1356 it seems that queue_declare()
returns a tuple with the message count)
If you need more precise metrics (especially nack message count), you need to use rabbitmqctl or rabbitmq_management. Rabbitmq_management is probably a good choice due to its HTTP API. More info : http://www.rabbitmq.com/management.html
Using pika:
import pika
pika_conn_params = pika.ConnectionParameters(
host='localhost', port=5672,
credentials=pika.credentials.PlainCredentials('guest', 'guest'),
)
connection = pika.BlockingConnection(pika_conn_params)
channel = connection.channel()
queue = channel.queue_declare(
queue="your_queue", durable=True,
exclusive=False, auto_delete=False
)
print(queue.method.message_count)
Using PyRabbit:
from pyrabbit.api import Client
cl = Client('localhost:55672', 'guest', 'guest')
cl.get_messages('example_vhost', 'example_queue')[0]['message_count']
Using HTTP
Syntax:
curl -i -u user:password http://localhost:15672/api/queues/vhost/queue
Example:
curl -i -u guest:guest http://localhost:15672/api/queues/%2f/celery
Note: Default vhost is /
which needs to be escaped as %2f
Using CLI:
$ sudo rabbitmqctl list_queues | grep 'my_queue'
following the answer of ChillarAnand you can get the value easily. the data is in the object.
import pika
connection = pika.BlockingConnection(pika.ConnectionParameters(
host='localhost',
port=5672,
credentials=pika.credentials.PlainCredentials('guest', 'guest'),
)
channel = connection.channel()
print(channel.queue_declare(queue="your_queue", durable=True, exclusive=False,
auto_delete=False).method.message_count)
and you will get the exact message number
We’re using amqplib to publish/consume messages. I want to be able to read the number of messages on a queue (ideally both acknowledged and unacknowledged). This will allow me to show a nice status diagram to the admin users and detect if a certain component is not keeping up with the load.
I can’t find any information in the amqplib docs about reading queue status.
Can someone point me in the right direction?
Using the Java API, you can do the following :
channel.queueDeclarePassive(queueName).getMessageCount()
I believe this is also available with amqplib (according to https://code.google.com/p/py-amqplib/source/browse/amqplib/client_0_8/channel.py#1356 it seems that queue_declare()
returns a tuple with the message count)
If you need more precise metrics (especially nack message count), you need to use rabbitmqctl or rabbitmq_management. Rabbitmq_management is probably a good choice due to its HTTP API. More info : http://www.rabbitmq.com/management.html
Using pika:
import pika
pika_conn_params = pika.ConnectionParameters(
host='localhost', port=5672,
credentials=pika.credentials.PlainCredentials('guest', 'guest'),
)
connection = pika.BlockingConnection(pika_conn_params)
channel = connection.channel()
queue = channel.queue_declare(
queue="your_queue", durable=True,
exclusive=False, auto_delete=False
)
print(queue.method.message_count)
Using PyRabbit:
from pyrabbit.api import Client
cl = Client('localhost:55672', 'guest', 'guest')
cl.get_messages('example_vhost', 'example_queue')[0]['message_count']
Using HTTP
Syntax:
curl -i -u user:password http://localhost:15672/api/queues/vhost/queue
Example:
curl -i -u guest:guest http://localhost:15672/api/queues/%2f/celery
Note: Default vhost is /
which needs to be escaped as %2f
Using CLI:
$ sudo rabbitmqctl list_queues | grep 'my_queue'
following the answer of ChillarAnand you can get the value easily. the data is in the object.
import pika
connection = pika.BlockingConnection(pika.ConnectionParameters(
host='localhost',
port=5672,
credentials=pika.credentials.PlainCredentials('guest', 'guest'),
)
channel = connection.channel()
print(channel.queue_declare(queue="your_queue", durable=True, exclusive=False,
auto_delete=False).method.message_count)
and you will get the exact message number