Will try that fingerprint but found other clue.
If I play 4 processors and reach about 10k ingest, if I'm adding more it has no effect.
Also, when the above four are in play and I spawn 2 totally different ingesters with stdin input again all of them seem to kneel down at 10k. The different two I mention each can play at 2k.
So clearly not the each single logstash node problem.
Currently using 16 elastic nodes ( 9 spec as mentioned ) and 7 other a little less spec.
Any idea what's the cause? Almost like elastic would have ingest rate hard limit to 10k on cluster. Is that the case?