After upgrade from 3.3.7 -> 3.4.8, I've noticed that memory usage is erratic. Please consult the image below, showing memory available in green and memory used in blue on a tor dedicate system.

The upgrade to 3.4.8 took place on Saturday in week 37. The connection count / load was relativity stable:

(green inbound, blue outbound)

I was wondering if there were any changes from 3.3.7 to 3.4.8 which might impact memory behaviour on a middle-relay.

I'm also wander what is the "source" of this usage?

Potentially relevant config entries (remainder is port/ip, accounting & exit(no)):

MaxConsensusAgeForDiffs 4 hours

DirCache 0

MaxMemInQueues 64 MB (but "defaulting" to 256mb now)

Thanks in advance

Seb