GAE/Java (EU) - Strange instance behavior.

[Thanasis Delenikas]

Hello All,

I have a GAE (Java, EU) project, running for several years. Billing enabled and all.

During the last weeks, I am experiencing very strange instance lifecycle behavior.

Instances seem to shutdown completely and then restart. This leads to high latencies and high costs as well - because when they stop and restart, 2-3 instances appear (instead of one) probably due to the high latency.

Check the attached graph. This fluctuation is not normal. And has a direct impact on cost. Sometimes I hit 3x the cost of the good, old times when my workload was processed by one, always on instance.

Are you facing capacity issues in the EU datacenter or something?

[George (Cloud Platform Support)]

Hello Thanasis, 

You can limit the number of instances running with parameters such as max_instances in app.yaml. There is no outage or diminished service level on right now, but you may have been affected by such a situation a few days ago. To ascertain this was the case, and to investigate further, we need details such as your project number, copy of app.yaml, etc., which one should never publish in a public forum such as Groups. Instead, you should open an issue in the Public Issue Tracker, and mark it as private. 

[Thanasis Delenikas]

Thank you, will do.