How much memory does ActiveMQ?
Since the messages are persistent, they need to be saved onto the file system. Store usage limit is 512MB. The above screenshot shows the kahadb folder where persistent messages is 543 MB (512MB for the messages and other database related files).
Is ActiveMQ in memory?
ActiveMQ uses memory to store messages awaiting dispatch to consumers. Each message occupies some memory (how much depends on the size of the message) until it is dequeued and delivered to a consumer.
Where is ActiveMQ data stored?
Application saves ActiveMQ queue data in $JAVA_TEMP/activemq-data.
How can I increase my ActiveMQ heap size?
To increase the heap memory utilized by JMS/ActiveMQ on a Windows BVE:
- Install the 64bit Java 1.6 JRE from the Oracle web site (Java 6 is a requirement) on the Traverse BVE, if not already present.
- Stop all Traverse BVE components via the Traverse Service Controller.
How do I use ActiveMQ?
A Short ActiveMQ and JMS Tutorial
- Step 1: Download and start ActiveMQ.
- Step 2: Download the JMS Example file.
- Step 4: Open three additional console windows.
- Step 3: Do the Maven Install.
- Step 4: Start the JMS Consumers and Producer for Topic-based Messaging.
- Step 5: Send JMS messages to the Topic.
What is KahaDB?
KahaDB is a file based persistence database that is local to the message broker that is using it. It has been optimized for fast persistence. It is the the default storage mechanism since ActiveMQ 5.4. KahaDB uses less file descriptors and provides faster recovery than its predecessor, the AMQ Message Store.
How do you clean up ActiveMQ?
However, you can manually delete an unused queue of a stopped instance.
- Log in as administrator into Apache ActiveMQ.
- Click Manage ActiveMQ broker, then click Queues.
- Click Delete in the operations column for the queue that you want to delete.
Why is ActiveMQ used?
ActiveMQ is an open source protocol developed by Apache which functions as an implementation of message-oriented middleware (MOM). Its basic function is to send messages between different applications, but includes additional features like STOMP, JMS, and OpenWire.