[tor-bugs] #27813 [Core Tor/Tor]: Tor 0.3.4.8 is leaking memory

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#27813: Tor 0.3.4.8 is leaking memory
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 Reporter:  anong                                |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.4.8
 Severity:  Critical                             |     Resolution:
 Keywords:  regression? memleak oom              |  Actual Points:
  034-backport tor-relay                         |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by r1610091651@…):

 Similar story here.

 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.

 [[Image(https://www.dropbox.com/s/5mshoftrnpslima/mem-month.png?dl=1)]]

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

 [[Image(https://www.dropbox.com/s/ojq6dhwi0hcdis0/torconns-
 month.png?dl=1)]]
 (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)

 Os: Ubuntu 16.04.5 LTS

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27813#comment:7>
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