thanks for your answer.
I can share my experience:
parent circuit breaker is configured to 95% (real memory).
I am using G1GC with:
- bundled JDK so it's JDK 12 and this config is the one that is used
I looked the code and the memory calculation is using
So everything looks ok.
The circuit breaker is actually: "Reject the request if it cannot be done without doing GC". GC should start at 75% and the threshold is 95%. So theoretically it's good.
The issue is that I can see the heap of the process at 2.5GB out of 3GB (more than 75%...) for a lot of time (idle time). When the memory goes to 2.8 and more the requests are rejected.
I have a feeling that after sending some requests to the cluster the memory is released (GC) and everything is back to normal. But it's not automatic and I could see the GC was triggered only 30 seconds after rejecting the request (the system wasn't loaded at that time, the memory use shouldn't be 3GB)
Why isn't the GC triggered? Do you want me to do some special checks?