Under 2.3.5 the memory usage keeps increasing over time, until the machine finally goes OOM.
I did manage to make a core dump of the process but running under valgrind for a long time isn't something I managed to do.
The config is as follows
as you can see I already disabled sescmd history to rule this out. The core dump is quite large and I cannot upload it publicly as I'm not sure it doesn't contain any sensitive data but if there is anything I can do with it to help out please let me know.