Re: [tor-talk] MaxMemInCellQueues questions

[Gordon Morehouse <gordon@xxxxxxxxxxxx>]

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Hi s7r, I can't answer most of your questions offhand, but this may
have something useful:

https://trac.torproject.org/projects/tor/ticket/9686

It's a bug I opened about the setting on low-memory machines.

s7r@xxxxxxxxxx:
[snip]
> -- in this case, with the default install of Tor (from 
> torproject.org or repositories), without any editing of torrc file 
> from user's side, what is the MaxMemInCellQueues value set to? Or 
> is it not set at all? With an improper configuration for this
> value made by the users running relays, won't this cause a penalty
> over the performance of Tor network overall?

- From the above bug, I know the early minimum was 500MB.  I do not know
if or how the default was calculated.  It should now be 384MB in Tor
0.2.5.x so that relays with ~512MB of physical RAM can function (e.g.
Raspberry Pi and other little ARM boards, and doorstop Pentiums, etc.)

> It could be confusing. How many of current admins are using 
> MaxMemInCellQueues and more important is it used correctly or are 
> honest circuits being killed? (I could add that since few weeks ago
> circuits to OFTC irc server for example do not last more than 24
> Hrs).

It is my understanding, which may be incorrect, that once this feature
- - or more accurately its immediate predecessor discussed in the bug
above - was introduced, that it was turned on by default.

Hope this is helpful.

- -Gordon M.


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