ok - it looks like you might need to tune KahaDB - set the
indexCacheSize = 1000 - see http://activemq.apache.org/kahadb.html
cheers,
Rob
On 15 Feb 2010, at 18:46, rideallday wrote:
Yes, topics are durable.
Test case:
1. publish messages to queue, let several hundred thousand accumulate.
2. publish topics to queue, let several hundred thousand accumulate
3. begin consuming from queue.
4. begin consuming from topic.
You should see a huge degrade in performance and a bunch of indexing
messages once you start to consume from topic.
rajdavies wrote:
could you provide a test case ?
cheers,
Rob
On 11 Feb 2010, at 21:41, rideallday wrote:
Umm, actually I'm still seeing issues with high Index times for
topics.
My test case is:
Send a huge amount of messages into the broker. Let several hundred
thousand
accumulate. Then start consumers and see how long it takes to drain
the
queues and topics.
The result is:
For queues- excellent. Performance is amazing. A few 1000ms Journal
append
messages, but recovery performance exceeds my requirements.
For topics- Index updates in the 2-700ms range. This happens every
second or
so and locks the consumer, so recovery is extremely slow.
This is very similar behaviour to what I saw with Topics and Queues
before
Rob applied the fix for cursors in KahaDB.
Is it possible that the fix needs to be also applied to topics?
I'm using 5.4 snapshot from Feb 1.
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Rob Davies
http://twitter.com/rajdavies
I work here: http://fusesource.com
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View this message in context:
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Rob Davies
http://twitter.com/rajdavies
I work here: http://fusesource.com
My Blog: http://rajdavies.blogspot.com/
I'm writing this: http://www.manning.com/snyder/
