Performance issues under heavy load

Hello all,

I’m having a problem with a flow that I’ve written using only the built in webMethods components (i.e. no Java Services) and under load testing, where we’re invoking the flow via web browser with 24 concurrent threads, we’re seeing a bizarre performance issue. During a 12 hour test, we’re seeing a baseline response time of 28 seconds, which is what we expected. However, every five minutes or so, we see a spike where response time is slower. My intuition is that this is the garbage collector- but this is where things get strange. As we approach the end of the test, the spike grows linearly until the delay is approximately 17 seconds every 5 minutes. Can this be a memory leak?

We’re using the msjvm (we have to since MSMQ is part of our solution) and wM Integration Server 4.6.

Thanks for any help you can offer!