Performance improvements for creating a lot of subscriptions

[michael10]

We use Hornetq 2.2.14

We have about 7000 topic subscriptions server side and we found out that we get performance problems with an application that creates about ~60 subscriptions more.

With profiling we see that 1 subscription takes about 100ms, so we lost 6sec.

We also knowing that the network and the server need some time (it´s a WAN and the server is sometimes working hard).

So is there a possability for speed up creating subscriptions, e.g do not blocking when creating a new subscription.

We also check to do not stopping the connection when creating a subscription, but there is not much benefit.

I test it on my local machine and creating 7000 subscriptions and 1 subscription takes about 15ms. 

So if you have any hints, it would help us.

Greetings.

[clebert.suconic]

The client will need to block until the subscription is created... Are you doing this on a single application?

Maybe you should pre-create that through management on the server?

[clebert.suconic]

Can you try 2.3.0 on this?

[michael10]

It's a termin-view-module in a framework.  And if you switch to another day, it creates subscriptions (~60) and removes old one. It would be difficuld to redesign this module. 

What you mean with pre-create?

Its not easy to test with new version, but we can try it. Are there made some changes (performance) in creating subscriptions in the new version?