Memory and disk alarms in RabbitMQ - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

Check RabbitMQ memory alarm status

What is the output of the following command when RabbitMQ memory alarm is active?

RabbitMQ

rabbitmqctl status | grep memory

A {memory, false}

B {memory, true}

C memory: active

D No memory alarm found

💡 Hint

Look for the memory field in the status output.

When RabbitMQ memory alarm is active, the status command shows {memory, true}.

🧠 Conceptual

intermediate

Purpose of disk alarm in RabbitMQ

What is the main purpose of the disk alarm in RabbitMQ?

A To prevent RabbitMQ from running out of disk space by blocking producers

B To alert the administrator but allow all operations to continue

C To automatically delete old messages to free disk space

D To restart RabbitMQ service when disk usage is high

💡 Hint

Think about how RabbitMQ protects itself from disk full conditions.

Disk alarms block message producers to prevent RabbitMQ from running out of disk space.

❓ Troubleshoot

advanced

Resolving RabbitMQ memory alarm stuck state

After freeing memory, the RabbitMQ memory alarm remains active. Which command correctly clears the alarm?

A rabbitmqctl clear_memory_alarm rabbit@node

B rabbitmqctl reset_memory_alarm

C rabbitmqctl clear_memory_alarm

D rabbitmqctl clear_memory_alarm rabbit@localhost

💡 Hint

You must specify the correct node name to clear the alarm.

The command requires the exact node name to clear the memory alarm.

✅ Best Practice

advanced

Recommended disk alarm threshold configuration

Which configuration snippet correctly sets the disk alarm threshold to 5GB free space in RabbitMQ?

RabbitMQ

rabbitmq.conf

A disk_free_limit.absolute = 5000000000

B disk_free_limit = 5GB

C disk_free_limit.absolute = 5368709120

D disk_free_limit.absolute = 5GB

💡 Hint

RabbitMQ config supports size suffixes like 5GB, MB for disk limits.

RabbitMQ supports size suffixes such as 5GB for disk_free_limit.absolute in rabbitmq.conf.

🔀 Workflow

expert

Sequence to diagnose and fix RabbitMQ disk alarm

What is the correct order of steps to diagnose and fix a RabbitMQ disk alarm?

A 1,3,2,4

B 2,1,3,4

C 1,2,3,4

D 2,3,1,4

💡 Hint

Start by checking the actual disk usage before confirming alarm and fixing.

First check disk usage, then confirm alarm, free space, and finally clear alarm.