it seems that memory watermark did not work

[4118...@qq.com]

server version: 3.6.6
watermark configuration：Memory limit set to 6354MB of 15886MB total(40%).
describe：
The mq process was killed by the Linux OOM, and the system log records that during the kill, the memory usage of mq is as follows:
total-vm:17600196KB,anon-rss:15291812KB

My question is, since I have set the water level of the memory(40%), why does it appear that this control has failed（Before OOM, there were no errors in the logs regarding restrictions on publishers）

Under what circumstances will memory threshold fail?

this is system log:

• Before OOM, there were no particularly obvious anomalies observed in Grafana:

- the vhost messages in Grafana:

[jo...@cloudamqp.com]

Hi,

Version 3.6.6 of RabbitMQ brings back memories! 

You need to upgrade to RabbitMQ 3.12.

/Johan