Slow asynchronous acknowledgments

[adamw]

Hello,

I'm trying to run some performance tests of HornetQ, and I want to send messages in batches, and then wait for an acknowledgment for the whole batch. However big the batch is (I tried 1-10000 messages), getting back acknowledgments takes about 2 seconds. Isn't it a lot as for a server which is located on localhost?

I'm using a non-transacted session, the code is here: https://gist.github.com/adamw/8eebb453e368a9bf079d

Am I doing something wrong, or is it working as expected?

Adam

[jbertram]

I wrote a simple test in the HornetQ test-suite to mimic what you're doing.  You can find the relevant diff it at Simple timing test for send acknowledgements.  When I run the test on my machine I consistently get ~1700 milliseconds so I think what you're seeing is "expected" in the sense that it appears consistent between disparate tests.

[jbertram]

BTW, that diff is for the "master" branch.

[adamw]

I see, thanks a lot for taking the time to repeat the test.

What would be the "recommended" way of sending messages (possibly batched) and getting back acknowledgments that messages indeed have been sent? The way I'm doing it now, or is there a faster way?

Adam

[jbertram]

If you want to batch up a bunch of messages, send them, and receive an ack then the simplest way would be to create a transacted session, send a bunch of messages, and commit the session.  When commit returns then you know you've gotten the ack.

[adamw]

Ok, thanks, I'll try that. Somehow I thought that transactions have some other kind of overhead, and using non-transactional sessions will be faster.

Adam