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I just completed some load tests with Glassfish v2ur2 on Linux, Clustered, a 4 way, Intel based machine and JDK 1.5 (JDK 1.6 would be better, but was not available in this case). I used a simple CRUD application as load generator, without think-time, and almost empty database, just to stress the appserver as much as possible.

The two load-generators ran remotely (via IIOP, standard EJB 3 client), each with 50 virtual users. Glassfish passed all tests without any problems, the response times and transaction / seconds were very stable. We just increased the number of connnections in the JDBC-pool, and set the -Xmx to 512m: no further tuning was performed.

The performance was impressive: 250 - 500 Transactions / second (we weren't alone on the machine :-(). We performed the tests with another, commercial, application server as well. The results were similar.

I actually performed similar, but not comparable, test several years ago (around 2003) with EJB 2. / CMP 2.0. We had more load generators (250 - 300 virtual users) available and were able to execute 800 transactions / seconds.

Conclusion: The performance of even remote (IIOP!) EJB 3 rocks :-), and Glassfish performs well, even without any further tuning.

In real world, however, most of the performance gets lost in contention / locks and synchronization issues... But you should not blame your server / framework / platform for it :-).

Posted at 11:50AM Aug 21, 2008 by Adam Bien in Java EE 5 Architectures And Idioms  |  Kommentare[0]

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