Hi, I've been testing possible memory leak in my app using JDO. I created a small app with two servlets, the other servlet creating one small JDO entity and the other servlet creating an entity with Objectify. Running the test with JMeter I've realised the memory usage grows quite a bit when using JDO (same can be seen in profiler with dev server too). With Objectify the memory usage grows a little BUT it seems that GAE kills the instance as soon as it has got 9000 requests.
I've run the (objectify) test using threaded and non-threaded mode. With non-threaded I'm sending about 3-4 requests per second which are being handled by single instance. It takes almost 40 minutes to reach 9000 requests and then instance memory usage is about 52-58mb and latency 22-27ms. And when 9000 requests are reached the instance is being killed. When I run the app threaded, I can send about 20 requests per second and it takes just over 7 minutes to reach that 9000 request limit (memory usage is usually at 53mb) and the instance is killed. With upcoming pricing model I pay for at least 15 minutes for each instance? Why does GAE kill my instance at exactly 9000 requests (no matter how soon the 9000 requests are reached and no matter what is the memory usage or latency)? I was closely watching my production app and the same happens also there. This is output of instances in the control panel for my test app just before reaching 9000 requests: QPS*Latency*RequestsErrorsAgeMemoryAvailability20.70026.8 ms897600:07:2151.8 MBytes[image: Dynamic Icon]Dynamic and this just seconds second later: *Instances *[image: help]<http://code.google.com/appengine/docs/adminconsole/instances.html> QPS*Latency*RequestsErrorsAgeMemoryAvailability0.0500.0 ms500:00:0140.3 MBytes[image: Dynamic Icon]Dynamic -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine-java/-/EHmdh2ldi84J. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
