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List:       freeradius-users
Subject:    Re: [EXTERNAL] Re: FR 3.0.21 : Failed adding proxy socket: Too many open sockets
From:       "Winfield, Alister via Freeradius-Users" <freeradius-users () lists ! freeradius ! org>
Date:       2020-08-21 10:28:17
Message-ID: 30E6E6B1-D4AC-4B77-A5FB-DEC27D01F4F9 () sky ! uk
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Add to this that you should care about latency. No point queuing 1000's of extra \
requests if it means that the queue is too long to process...

That is the time to process everything in the queue > timeout of clients / devices. \
(Only option if that's the case is more capacity or optimisation wherever the \
bottleneck is).

To get AAA tuning right the only option is test it with realistic requests and \
request rates and see what you get. Get into the habit of doing this for every change \
and you won't get surprised by sudden performance deltas associated with what on the \
face of it are trivial configuration updates. Also beware the hockey stick \
performance case found by graphing request rate vs latency. See a huge latency delta \
for a tiny delta in request rate and you need to be careful if you are running \
anywhere near the limit.

Alister.


On 20/08/2020, 15:55, "Freeradius-Users on behalf of Alan DeKok" \
<freeradius-users-bounces+alister.winfield=sky.uk@lists.freeradius.org on behalf of \
aland@deployingradius.com> wrote:

    On Aug 20, 2020, at 10:46 AM, Arnaud LAURIOU <arnaud.lauriou@renater.fr> wrote:
    > I have a few questions for which I haven't found answer yet :
    > Is there good tuning practices ?

      Set it to a value which is reasonable.  What "reasonable" means depends on your \
situation.

      i.e. a busy server may *normally* have thousands of packets outstanding.  A \
small server may normally have 10 packets outstanding.

    > Is this counter reset ? For example :
    > - If a home_server is temporarly dead, is his value reset when it comes alive \
again ?

      If the home server is dead, then it has no outstanding packets.  And therefore \
the outstanding packet counter is zero.

    > - If a home_server reaches this counter limit, how long will it be unused ?

      Until it either responds to packets (which lowers the outstanding counter), or \
it is marked as dead (which sets the counter to zero).

      i.e. it does what makes sense.

      Alan DeKok.


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