I've got a gateway that our company is maintaining for a customer, and we are trying to track down a performance issue and I need some advice on where to go. This is a gateway that is a perspective and webdev system. This gateway is a central gateway in the customer's data center that is communicat…

Bit of an odd memory usage pattern. Typical is a sawtooth. A healthy sawtooth tends to ramp from 40%-ish (or less) to 80%-ish, then GC knocks it back down. Except. Long time spans for requested graphs, especially in the reporting module, randomly spike memory. A couple or more such requests tog…

Yeah... that is something I recognized as well on the memory. Specifically, on this gateway there are not connected devices etc... This is used as a clearing house for remote data monitoring and then handling specific truck ticketing located at remote sites. Do you have any recommended sites so I …

I happen to be using it right now on one of my VMs for driver testing, with this in ignition.conf. wrapper.java.additional.9=-XX:+FlightRecorder wrapper.java.additional.10=-XX:StartFlightRecording=maxsize=2g,filename=porthos81z.jfr 2GB is probably too big. (: And you probably want the dumponexit …

For the GC reporting, I use this: wrapper.java.additional.3=-Xloggc:/var/log/ignition/javagc-%WRAPPER_TIME_YYYYMMDDHHIISS%.log wrapper.java.additional.6=-XX:+PrintGCDetails Adjust that file name pattern to suit your needs. As shown, you'll need to clean them out manually.

Thanks! I've got a local gateway in our office I can play with to try and learn how to decipher the data. Do you think that maybe there just isn't enough memory assigned? I can add quite a bit more to the gateway., I just don't want to go that route and just cover something else up.

To look at the files you get, you will want "JDK Mission Control" and/or "VisualVM". I like the latter for looking at HPROF dumps.

[image] bschroeder: maybe there just isn't enough memory assigned? It's possible. I'd look at the GC details first. And if you get another crash after JFR is set up, look at that, too.