[tor-bugs] #24782 [Core Tor/Tor]: Set a lower default MaxMemInQueues value

["Tor Bug Tracker & Wiki" <blackhole@xxxxxxxxxxxxxx>]

#24782: Set a lower default MaxMemInQueues value
------------------------------+---------------------------------
     Reporter:  teor          |      Owner:  (none)
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.2.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  tor-relay, tor-ddos
Actual Points:                |  Parent ID:
       Points:  0.5           |   Reviewer:
      Sponsor:                |
------------------------------+---------------------------------
 The default MaxMemInQueues value of 0.75*RAM assumes:
 * there is one tor instance per machine, and
 * MaxMemInQueues covers most queue memory.

 If we instead assumed:
 * two tor instances, and
 * MaxMemInQueues covers half of queue memorym
 this would make Tor more resilient to attacks.

 To do this, we should set MaxMemInQueues to 0.2*RAM, at least if we have a
 lot of RAM (like 4-8GB or more).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24782>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online

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