On 1/15/07, Rainer Klute <[EMAIL PROTECTED]> wrote:
Rob Davies schrieb:
> The big difference between topics and queues is that for queues, if
> the messages have a persistent delivery mode, they are always added to
> the message store. This is only true for topics if a durable
> subscriber exists and is interested in that topic.
Which is not good. If many messages are added to the topic without being
taken off from the broker by consumers, the memory is soaked up quickly,
Sure - there's a few different solutions for this, plus you can
increase the RAM buffer with the <usageManager>..
.
http://incubator.apache.org/activemq/slow-consumer-handling.html
OutOfMemoryErrors occur, and the whole application gets corrupted.
Well it hangs producers until consumers consume stuff to free up space.
If
the topic is too full, ActiveMQ should start to swap messages to
external memory (disk).
It does :) Though you'll need the latest 4.2-SNAPSHOT to get spooling
to disk for non-persistent messaging.
--
James
-------
http://radio.weblogs.com/0112098/
