[tor-bugs] #11791 [Tor]: Our zlib deflate objects require lots of memory per directory connection

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#11791: Our zlib deflate objects require lots of memory per directory connection
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     Reporter:  nickm    |      Owner:
         Type:  defect   |     Status:  new
     Priority:  normal   |  Milestone:  Tor: 0.2.6.x-final
    Component:  Tor      |    Version:
   Resolution:           |   Keywords:  tor-relay, zlib, 025-backport,
Actual Points:           |  026-triaged-1
       Points:           |  Parent ID:
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Comment (by nickm):

 >My first idea was to store them compressed, so we wouldn't need to do on
 the fly deflation, but that'd mean they don't compress too well.

 Maybe we should look for designs where a bunch of clients will wind up
 requesting the same sets of descriptors?  That might help.  Could be
 tricky, though, and it would represent a big divergence from our current
 design.

 > Can we change the setting dynamically if we've had to invoke the
 oomkiller before?

 Or we could change the settings if we are close to the memory limit.  But
 I don't know whether that's a such win: we'd be using more bandwidth that
 way.

 And maybe we could retain the current settings, but limit the number of
 descriptor downloads that we support concurrently.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11791#comment:3>
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